Title of Invention

A RECLINER REGULATING DEVICE

Abstract The present invention discloses a recliner regulating device and relates to the mechanical technology field. The present device comprises a locking cam, an unlocking cam with a thickness less than the locking cam, a ratchet gear, a coulisse and a return spring connected with a central shaft. The locking cam is connected with the unlocking cam. Sliders are connected with the unlocking cam and sliding grooves. A jacket is connected with the ratchet gear and the coulisse. The return spring is connected with the coulisse. The thickness of the locking cam and the unlocking cam can be respectively designed in terms of the stress applied thereon. Since the locking cam and the unlocking cam are separately produced, structure of the die is simplified and service life of the die is improved significantly. The locking cam and the unlocking cam can be manufactured by punch, which leads to a greater production efficiency. Moreover, jacket-type configuration is adopted in the device, which makes its entire structure simple, installation flexible and also makes the device need no maintenance.
Full Text FIELD OF THE INVENTION
This invention relates to the field of mechanical technology, in particular to a recliner
regulating device.
BACKGROUND OF THE INVENTION
At present, functions of angle-regulating and back's quick-folding can be realized in most
of the recliner which then will be locked up after the angle-regulating is completed so as to
fix the angle between the recliner seat and the recliner back.
There are mainly two modes to achieve angle-regulating in the prior arts. The first mode
is disclosed for example in Chinese Utility Model Patent No. 200420017699.4 titled "Plate
spring type armchair angle regulating and back folder nuclear installation". As shown in
Figure 1, two-slider configuration is adopted in this device to realize the angle-regulating.
This device possesses the merits of compact conformation and exempt to maintenance.
However, because two sliders are adopted in the device, after the central shaft 101 rotates, the
sliders 102 will make translation in the sliding grooves toward the circumference of ratchet
gear 106 under the action of the return spring 103 until the slider teeth 104 are engaged with
the ratchet gear teeth 105 completely. Also, owing to the two-slider configuration adopted,
after the slider teeth 104 engage with the ratchet gear teeth 105, the central shaft 101 may not
be at the center position due to the effect of the sliders 102. Therefore, the problem is that the
engagement between the slider teeth 104 and the ratchet gear teeth 105 is instable.
The second mode is disclosed for example in Chinese Utility Model Patent No.
01250171.9 titled "Core driving device for chair angle regulator". As shown in the Figure 2
and 3, the cam mechanism of this device includes three sliding grooves and three sliders. The
cam mechanism of the device further includes an unlocking part having cam grooves 202 and
a locking part having reinforcement ribs 201. The cam grooves 202 and central hole of the
cam are produced by punch process. As the intensity of the unlocking part is bigger than that
of the locking part, when the entire thickness of the cam meets the locking requirements,
intensity margin of the unlocking part is oversized, which leads to an increase of the entire
thickness of the device and a bad manufacturability when punching the cam grooves 202 and
the central hole. When the punching condition is satisfied, the thickness of the locking part is
identical with that of the unlocking part, as shown in Figure 3. Since the forces applied on the
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locking part when supporting the sliders are bigger than that applied on the unlocking part,
the stress is different. Moreover, it is difficult to manufacture the cam, because the cam has
reinforcement ribs and the profile thereof includes a plurality of curved segments. This device
adopts an attaching-type configuration, which leads to the structure of the device ponderous
and bulky.
SUMMARY OF THE INVENTION
In views of this, the object of the invention is to provide a recliner regulating device
comprising an unlocking cam, a locking cam, sliders having slider teeth, a ratchet gear having
ratchet gear teeth, a coulisse having sliding grooves, a return spring, a central shaft and a
jacket, wherein the unlocking cam with a thickness less than the locking cam, the locking
cam, the ratchet gear, the coulisse and the return spring are connected with the central shaft;
the locking cam is connected With the unlocking cam; the sliders are connected with the
unlocking cam and the sliding grooves; the jacket is connected with the ratchet gear and the
coulisse; and the return spring is connected with the coulisse.
Preferably, the unlocking cam, the locking cam, the ratchet gear, the coulisse, the return
spring and the central shaft are connected such that the unlocking cam, the locking cam and
the return spring form a shaft connection with the central shaft through their respective square
holes, and that the ratchet gear and the coulisse form a shaft connection with the central shaft
through their respective round holes.
Preferably, the sliders are connected with the unlocking cam and the sliding grooves such
that the sliders are connected through their respective bosses with the respective cam grooves
on the unlocking cam and that the sliders are fitted in the sliding grooves in a manner of a
clearance fit.
Preferably, the locking cam and the unlocking call are connected such that the locking
cam is connected through its respective semi-punched bosses with the respective holes on the
unlocking cam.
Preferably, the ratchet gear has bosses connecting with a connecting plate of the recliner
back.
Preferably, the coulisse has bosses connecting with a connecting plate of the recliner seat.
Preferably, the ratchet gear further has ratchet gear sliding surfaces which come into
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contact with the slider teeth after the unlocking cam and the locking cam are restored through
the central shaft under the action of the return spring.
Preferably, the numbers of the sliding grooves and the sliders are three or more than three,
respectively.
Preferably, the slider teeth are engaged with the ratchet gear teeth after the unlocking cam
and the locking cam are restored under the action of the return spring; and the slider teeth are
disengaged with the ratchet gear teeth after the unlocking cam and the locking cam are
rotated by the central shaft.
The advantages of the device according to the invention are that the thickness of the
locking cam and the unlocking cam can be determined separately depending on their
subjected stress. It is optimal when the thickness of the unlocking cam is less than that of the
locking cam and when the thickness of the locking cam is identical with that of the sliders. In
this case, stress on the locking cam and the unlocking cam is balanced most. Meanwhile,
since the locking cam and the unlocking cam are manufactured separately and satisfy the
punching condition, the production efficiency is significantly improved compared with that of
the integral cam.
When adopting three sliding grooves and three sliders, the device enables both the
self-centering of the central shaft and the angle locking-up of the recliner, so that engagement
between the slider teeth and the ratchet gear teeth are more stable.
Moreover, jacket-type configuration is adopted in the device, which makes its entire
structure simple, installation flexible and also makes the device free of maintenance.
Quick-folding of the recliner can be realized at the same time of angle-regulating of the
recliner.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a sketch-map of the angle-regulating device for a recliner with two sliders
according to the prior arts.
Figure 2 is a front view of the cam configuration with three sliders according to the prior
arts.
Figure 3 is a left view of the cam configuration with three sliders according to the prior
arts.
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Figure 4 is a front view of the connection between three sliders and the cam according to
an embodiment of the invention.
Figure 5 is a left view of the connection between three sliders and the cam according to
the embodiment of the invention.
Figure 6 is an assembling sketch-map according to the embodiment of the invention.
Figure 7 is a further assembling sketch-map according to the embodiment of the
invention.
DETAILED DESCRIPTION OF THE INVENTION
The configuration of the device and the connection relationships among various
components of the device are described in detail by way of an embodiment of the invention
with reference to the attached drawings.
Three sliders are adopted in this embodiment. As shown in Figure 4 and 5, a locking cam
26 is connected with an unlocking cam 27 through respective semi-punched bosses 19 on the
locking cam 26. Sliders 5 are connected with three symmetrical cam grooves 4 on the
unlocking cam 27 through respective semi-punched bosses 18 on the sliders 5. A self-locking
is formed between each self-locking surface 31 of the sliders 5 and each self-locking surface
30 of the locking cam 26.
When the angle-regulation of a recliner is realized through the recliner regulating device
having the configuration of above mentioned three sliders, engagement between the teeth will
become more stable and flexible. The recliner regulating device adopting three sliders will be
described in detail with reference to Figure 4, Figure 5, Figure 6 and Figure 7.
In this embodiment, the recliner regulating device comprises a ratchet mechanism, a cam
mechanism, a return spring 7, a central shaft 11 and a jacket 9 connecting the former
components. The ratchet mechanism is consisted of a ratchet gear 1 and sliders 5, while the
cam mechanism is consisted of an unlocking cam 27, a locking cam 26, a coulisse 13 and
sliders 5.
The ratchet gear 1 provides on its back several semi-punched bosses 2, through which the
ratchet gear 1 can be connected with a connecting plate of the recliner back. Ratchet gear
teeth 28 and ratchet gear sliding surfaces 29 are provided in the inner cavity of the ratchet
gear 1. Three sliding grooves 12 are disposed evenly on the coulisse 13. Three sliders 5 are
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located in the three sliding grooves 12 of the coulisse 13, respectively. A clearance fit is
formed between the side surfaces 6 of the sliders 5 and the side surfaces 10 of the sliding
grooves 12. Semi-punched bosses 25 on the coulisse 13 can be connected with a connecting
plate of the recliner seat.
Each slider 5 provides on its outer side slider teeth 32 which can be engaged with the
ratchet gear teeth 28, provides on its inner side a segment of self-locking surface 31, and
provides on its middle part a semi-punched boss 18. There are three segments of cam
self-locking surfaces 30 corresponding to three slider self-locking surfaces 31 as well as three
semi-punched bosses 19 on the locking cam 26. On the unlocking cam 27, there are three cam
grooves 4 respectively corresponding to the semi-punched bosses 18 on the middle part of the
three sliders 5 simultaneously. Semi-punched bosses 18 on the sliders 5 are connected with
the unlocking cam 27 in the cam grooves 4. On the unlocking cam 27, there are three holes 3
connected with three semi-punched bosses 19 on the locking cam 26. Inner hole of the return
spring 7 is square in shape. The unlocking cam 27 and the locking cam 26 are directly
connected with the outer square part of the central shaft 11 through their inner square holes.
External hook 17 of the return spring 7 is fixed in the hole 24 of the coulisse 13. Clearance
fits are formed between the curved surfaces 14, 16 on both ends of the central shaft 11 and
the central hole 22 of the coulisse 13 as well as the central hole of the ratchet gear 1
respectively. Chamfers 15 are formed on the central shaft 11, which can prevent the
interference between the inner square hole 8 and the central shaft 11 when the inner square
hole 8 of the return spring 7 is connected with the central shaft 11. Jacket 9 is fixedly
connected with the coulisse 13 through clamping. A clearance fit is formed between the inner
circumference 21 of the jacket 9 and the outer circumference 20 of the ratchet gear.
After connecting three semi-punched bosses 25 on the coulisse 13 with the connecting
plate of the recliner seat and connecting six semi-punched bosses 2 on the ratchet gear 1 with
the connecting plate of the recliner back, when an external torque opposite to the direction of
return spring 7 is exerted on the central shaft 11, the unlocking cam 27 is moved by the
central shaft 11 toward the unlocking direction, which is the counterclockwise direction as
shown in Figure 2. At the same time, three cam grooves 4 bring the three sliders 5 to make
translation along the sliding grooves 12 toward the center of the central shaft 11 until the
slider teeth 32 are disengaged with the ratchet gear teeth 28 completely. At this time, the
ratchet gear 1, which is connected with the recliner back, may rotate freely about the center of
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the jacket 9 with respect to the coulisse 13 so as to realize the angle-regulation of the recliner.
When the angle is regulated to a desired angle, the external torque is released. At this time,
the central shaft 11 will rotate clockwise under the acting force of the return spring 7, so that
the sliders 5 are urged by the locking cam 26 to make translation along the sliding grooves 12
away from the central shaft 11 until the slider teeth 32 are engaged with the ratchet gear teeth
28 completely. Under this circumstance, a self-locking is formed between the self-locking
surface 30 of the locking cam 26 and the self-locking surface 31 of the slider, which locks the
recliner back to the desired angle. During the rotation of the locking cam 26, a clearance fit is
formed between the curved surfaces 33 of the locking cam 26 and the inner curved surfaces
34 of the coulisse 13. After the slider teeth 32 are engaged with the ratchet gear teeth 28, the
central shaft 11 is self-centered so that the engagement between the slider teeth 32 and ratchet
gear teeth 28 becomes more stable.
After the central shaft 11 rotates, the recliner back is regulated to a specific angle by the
rotation of ratchet gear 1 when the slider teeth 32 are disengaged with the ratchet gear teeth
28. When the slider teeth 32 face to the ratchet gear sliding surfaces 29, the recliner back can
be quickly folded in a certain scale so that the quick-folding of the recliner back is fulfilled.
The locking cam 26 has a simple profile in which the procedure of adding a
reinforcement rib on the cam is omitted, which facilitates mass production and manufacture.
Adoption of the semi-punched bosses 19 for connecting the locking cam 26 with the
unlocking cam 27 makes the configuration simple and flexible.
It is still adopted a configuration of three sliders in the embodiment of this device, which
enables both locking-up of the recliner after angle-regulating and self-centering of the central
shaft 11.
Of course, the device according to the invention is not limited only to the configuration of
three sliders. The angle-regulating and locking-up also can be carried out by a configuration
of multiple sliders.
The thickness of the locking cam 26 and the unlocking cam 27 can be determined
separately depending on their subjected stress. It is optimal when the thickness of the
unlocking cam 27 is less than that of the locking cam 26 and when the thickness of the
locking cam 26 is identical with that of the sliders 5. In this case, stress on the locking cam 26
and the unlocking cam 27 is balanced most. Meanwhile, since the locking cam 26 and the
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unlocking cam 27 are manufactured separately and satisfy the punching condition, the
production efficiency is significantly improved compared with that of the integral cam.
When adopting three sliding grooves and three sliders, the device enables both the
self-centering of the central shaft and the angle locking-up of the recliner, so that engagement
between the slider teeth 28 and the ratchet gear teeth 32 are more stable.
Moreover, jacket-type configuration is adopted in the device, which makes its entire
structure simple, installation flexible and also makes the device need no maintenance.
Quick-folding of the recliner can be realized at the same time of angle-regulating of the
recliner.
While the invention has been described above by way of embodiments, the invention is
not limited to such embodiments. Various modifications, equivalent substitutions or
improvements may be made to the invention without departing from the spirit and scope of
the invention as set forth in the appended claims.
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WE CLAIM:
1. A recliner regulating device comprising an unlocking cam (27), a locking cam (26),
sliders (5) having slider teeth (32), a ratchet gear (1) having ratchet gear teeth (28), a
coulisse (13) having sliding grooves (12), a return spring (7), a central shaft (11) and a
jacket (9),
wherein the unlocking cam (27) with a thickness less than the locking cam (26), the
locking cam (26), the ratchet gear (1), the coulisse (13) and the return spring (7) are
connected with the central shaft (11); the locking cam (26) is connected with the
unlocking cam (27); the sliders (5) are connected with the unlocking cam (27) and the
sliding grooves (12); the jacket (9) is connected with the ratchet gear (1) and the
coulisse (13); and the return spring (7) is connected with the coulisse (13).
2. The device according to claim 1, wherein the unlocking cam (27), the locking cam
(26), the ratchet gear (1), the coulisse (13), the return spring (7) and the central shaft
(11) are connected such that the unlocking cam (27), the locking cam (26) and the
return spring (7) form a shaft connection with the central shaft (11) through their
respective square holes, and that the ratchet gear (1) and the coulisse (13) form a shaft
connection with the central shaft (11) through their respective round holes.
3. The device according to claim 1, wherein the sliders (5) are connected with the
unlocking cam (27) and the sliding grooves (12) such that the sliders (5) are
connected through their respective bosses (18) with the respective cam grooves (4) on
the unlocking cam (27) and that the sliders (5) are fitted in the sliding grooves (12) in
a manner of a clearance fit.
4. The device according to claim 1, wherein the locking cam (26) and the unlocking cam
(27) are connected such that the locking cam (26) is connected through its respective
semi-punched bosses (19) with the respective holes (3) on the unlocking cam (27).
5. The device according to claim 1, wherein the ratchet gear (1) has bosses (2)
connecting with a connecting plate of the recliner back.
6. The device according to claim 1, wherein the coulisse (13) has bosses (25) connecting
with a connecting plate of the recliner seat.
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10
7. The device according to claim 1, wherein the ratchet gear (1) further has ratchet gear
sliding surfaces (29) which come into contact with the slider teeth (32) after the
unlocking cam (27) and the locking cam (26) are restored through the central shaft (11)
under the action of the return spring (7).
8. The device according to claim 1, wherein the numbers of the sliding grooves (12) and
the sliders (5) are three or more than three, respectively.
9. The device according to claim 1, wherein the slider teeth (32) are engaged with the
ratchet gear teeth (28) after the unlocking cam (27) and the locking cam (26) are
restored under the action of the return spring (7); and the slider teeth (32) ere
disengaged with the ratchet gear teeth (28) after the unlocking cam (27) and the
locking cam (26) are rotated by the central shaft (11).

The present invention discloses a recliner regulating device and relates to the mechanical
technology field. The present device comprises a locking cam, an unlocking cam with a thickness
less than the locking cam, a ratchet gear, a coulisse and a return spring connected with a central
shaft. The locking cam is connected with the unlocking cam. Sliders are connected with the
unlocking cam and sliding grooves. A jacket is connected with the ratchet gear and the coulisse.
The return spring is connected with the coulisse. The thickness of the locking cam and the
unlocking cam can be respectively designed in terms of the stress applied thereon. Since the
locking cam and the unlocking cam are separately produced, structure of the die is simplified and
service life of the die is improved significantly. The locking cam and the unlocking cam can be
manufactured by punch, which leads to a greater production efficiency. Moreover, jacket-type
configuration is adopted in the device, which makes its entire structure simple, installation
flexible and also makes the device need no maintenance.

Documents:

00912-kol-2007-abstract.pdf

00912-kol-2007-claims.pdf

00912-kol-2007-correspondence others 1.1.pdf

00912-kol-2007-correspondence others 1.2.pdf

00912-kol-2007-correspondence others 1.3.pdf

00912-kol-2007-correspondence others.pdf

00912-kol-2007-description complete.pdf

00912-kol-2007-drawings.pdf

00912-kol-2007-form 1.pdf

00912-kol-2007-form 18.pdf

00912-kol-2007-form 2.pdf

00912-kol-2007-form 3.pdf

00912-kol-2007-form 5.pdf

00912-kol-2007-gpa.pdf

00912-kol-2007-others.pdf

00912-kol-2007-priority document.pdf

0912-KOL-2007-CORRESPONDENCE OTHERS 1.6.pdf

912-KOL-2007-ABSTRACT 1.1.pdf

912-KOL-2007-AMANDED CLAIMS.pdf

912-KOL-2007-CORRESPONDENCE 1.4.pdf

912-KOL-2007-CORRESPONDENCE 1.5.pdf

912-KOL-2007-CORRESPONDENCE 1.6.pdf

912-KOL-2007-CORRESPONDENCE 1.7.pdf

912-KOL-2007-CORRESPONDENCE 1.9.pdf

912-KOL-2007-CORRESPONDENCE OTHERS 1.5.pdf

912-KOL-2007-CORRESPONDENCE-1.8.pdf

912-KOL-2007-CORRESPONDENCE.1.3.pdf

912-KOL-2007-DESCRIPTION (COMPLETE) 1.1.pdf

912-KOL-2007-DRAWINGS 1.1.pdf

912-KOL-2007-EXAMINATION REPORT.1.3.pdf

912-KOL-2007-FORM 1-1.1.pdf

912-KOL-2007-FORM 18.1.3.pdf

912-KOL-2007-FORM 2-1.1.pdf

912-KOL-2007-FORM 3-1.1.pdf

912-KOL-2007-FORM 3.1.3.pdf

912-KOL-2007-FORM 5.1.3.pdf

912-KOL-2007-GRANTED-ABSTRACT.pdf

912-KOL-2007-GRANTED-CLAIMS.pdf

912-KOL-2007-GRANTED-DESCRIPTION (COMPLETE).pdf

912-KOL-2007-GRANTED-DRAWINGS.pdf

912-KOL-2007-GRANTED-FORM 1.pdf

912-KOL-2007-GRANTED-FORM 2.pdf

912-KOL-2007-GRANTED-LETTER PATENT.pdf

912-KOL-2007-GRANTED-SPECIFICATION.pdf

912-KOL-2007-INTERNATIONAL SEARCH REPORT.pdf

912-KOL-2007-OTHERS 1.3.pdf

912-KOL-2007-OTHERS-1.1.pdf

912-KOL-2007-OTHERS-1.2.pdf

912-KOL-2007-PA.1.3.pdf

912-KOL-2007-REPLY TO EXAMINATION REPORT 1.1.pdf

912-KOL-2007-REPLY TO EXAMINATION REPORT.1.3.pdf

912-KOL-2007-REPLY TO EXAMINATION REPORT.pdf

912-KOL-2007-SCHEDUAL-ANNEXURE FORM 3.pdf

abstract-00912-kol-2007.jpg


Patent Number 248936
Indian Patent Application Number 912/KOL/2007
PG Journal Number 37/2011
Publication Date 16-Sep-2011
Grant Date 12-Sep-2011
Date of Filing 26-Jun-2007
Name of Patentee HUBEI AVIATION PRECISION MACHINERY TECHNOLOGY CO., LTD.
Applicant Address NO. 8 ZHUIRI ROAD, HIGH-TECH ZONE, XIANGFAN, HUBEI PROVINCE
Inventors:
# Inventor's Name Inventor's Address
1 LUO, XIANHU NO. 8 ZHUIRI ROAD, HIGH-TECH ZONE, XIANGFAN, HUBEI PROVINCE 441003
2 HUANG, ZHENGKUN NO. 8 ZHUIRI ROAD, HIGH-TECH ZONE, XIANGFAN, HUBEI PROVINCE 441003
PCT International Classification Number B60N2/22; B60N2/22
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 200710079391.0 2007-02-16 China