JP2002177082A - Gear mechanism for angle regulation, and reclining seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gear mechanism for an angle regulation which can ensure a sufficient strength of gear teeth, and which can be miniaturized. SOLUTION: For this gear mechanism, a rotary fitting 30 is rotatably supported by a rotating shaft 60 between a pair of external plates 11 of a fixing metal fitting 20. The rotary metal fitting 30 has a pair of internal plates 41 which are arranged to be apart, and a gear main body 50, which is a separate body form the internal plates 41, and on which gear teeth 55 are formed. In this case, the gear main body 50 is connected and integrated in a space between the pair of the internal plates 41 by fastening with rivets. On the external surface of the fixing metal fitting, a spiral spring 13 which urges the rotary metal fitting 30 in the closing direction is fitted. In the fixing metal fitting, a claw member 80 is provided detachably from the gear teeth 55 of the gear main body 50. On the external surface of the fixing metal fitting, a tensile coil spring 12 and an operation lever 90 are arranged. In this case, the tensile coil spring 12 urges the claw member 80 in the engaging direction. The operation lever 90 disengages the claw member 80 from the gear teeth 55 through a cam member 70 while resisting the urging force of the spring 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclining seat capable of adjusting a backrest angle of, for example, a chair or a vehicle seat, and to an angle adjustment employed in a backrest rotary connecting portion of such a chair. It relates to a gear mechanism.

[0002]

2. Description of the Related Art As a gear mechanism for adjusting a backrest angle of a seat chair or the like, usually, a rotating bracket on a back frame side is rotatably fixed to a fixing bracket on a seat frame side, and a gear integrally formed with the rotating bracket. A detachable pawl member is provided on the fixing bracket on the tooth, and the pawl member is disengaged from the gear teeth by lever operation, so that the lock of the rotating bracket to the fixing bracket can be released. When adjusting the backrest angle, unlock the rotating bracket by operating the lever,
After the backrest is set at a desired angle, the lever operation is released, the pawl member is engaged with the gear teeth to lock the rotating bracket, and the backrest is maintained at a predetermined angle (actually 7-). 55957, etc.).

[0003] Rotary fittings and fixing fittings in such a backrest angle adjusting gear mechanism of a seat or the like are often manufactured from a press-formed product, and the gear teeth of the rotating fitting are rotated during press forming. At the same time, they are usually formed integrally. Accordingly, the thickness of the gear teeth is reduced as well as the thickness of the rotating bracket, and it is difficult to improve the strength of the gear teeth. For this reason, when the above-mentioned gear mechanism is adopted in a portion receiving a large load, it is common to attach a member for reinforcing the gear teeth or to form the gear teeth in a large shape.

[0004]

However, in the above-mentioned conventional backrest angle adjusting gear mechanism, when a member for reinforcing the gear teeth is assembled, the number of parts increases correspondingly, and the assembling work becomes difficult. At the same time, there is a problem that the cost increases. In addition, when the shape of the gear teeth is increased, the number of gear teeth decreases, the number of steps when changing the backrest angle decreases, and fine adjustment cannot be performed. There was a problem that it would be.

The present invention solves the above-mentioned problems of the prior art, and can reduce the number of parts, reduce the cost while simplifying the assembly while ensuring sufficient strength for the gear teeth. It is an object of the present invention to provide a gear mechanism for angle adjustment that can sufficiently increase the number of stages at the time of change, can perform fine adjustment of the rotation angle, and can achieve downsizing, and a reclining seat using the mechanism.

[0006]

According to a first aspect of the present invention, there is provided a fixing device having a pair of outer plates arranged in parallel and spaced apart from each other, and a fixing bracket arranged in parallel and spaced apart from each other. A pair of inner plates, and a gear body that is formed separately from the inner plates and has gear teeth provided on a part of the outer periphery, wherein the gear body is disposed between the pair of inner plates. In this state, a rotating bracket connected and integrated via a fixing tool, a rotating shaft for rotatably supporting the rotating bracket in a state where the rotating bracket is disposed between the pair of outer plates, and a rotating shaft for rotating the rotating bracket in a rotational direction. A rotating bracket biasing means for biasing the rotating body to one side, and the rotating bracket is provided between the pair of outer plates so as to be freely disengageable from gear teeth of the gear body, and is engaged with the gear teeth. The rotation of the bracket is restricted, and when the A claw member that allows rolling, a claw member urging means for urging the claw member in a direction to engage the gear teeth, and a urging force of the claw member against the urging force of the claw member urging means. The present invention also provides an angle adjusting gear mechanism including an operating lever for performing a disengagement operation with respect to the gear teeth.

In the gear mechanism for angle adjustment according to the first aspect of the present invention, the rotating bracket includes a rotating bracket main body having a pair of inner plates, and a gear body separate from the main body. Since it is arranged between the inner plates and connected and integrated by the fixing tool, for example, unlike the one in which the gear teeth are formed integrally with the rotating bracket, regardless of the thickness and shape of the rotating bracket main body, the gear The thickness and shape of the main body can be freely adjusted. For this reason, the gear teeth in the gear body can be formed to be thick and stable, and the gear teeth can have sufficient strength.

In the first invention, an engagement projection is provided on an outer surface of the gear body, while a cutout is provided on the pair of inner plates corresponding to the engagement protrusion, and the notch is provided in the cutout. It is preferable to adopt a configuration in which the engagement protrusion is housed and engaged in a position fixed state.

That is, when this configuration is adopted,
The positioning of the gear main body with respect to the rotary fitting main body can be easily achieved only by the operation of fitting the engagement projection.

In the first invention, the gear body is composed of a plurality of gear component plates laminated in the axial direction, and each gear component plate is constituted by a press-formed product obtained by stamping a metal plate. It is desirable to adopt the following.

That is, in this case, the gear body can be manufactured only by simple press molding, and the thickness of the gear teeth and the like can be appropriately set appropriately according to the intended use.

In the first aspect of the present invention, a cam member is rotatably provided between the pair of outer plates corresponding to the claw members, and the operation lever is rotatably provided on an outer surface of the outer plate on one side. Attached, the cam member is configured to rotate by a rotation operation of the operation lever, and the claw member is rotatably provided on the pair of outer plates, and the claw member is rotated with the rotation operation of the operation lever. It is preferable to employ a structure in which the pawl member is disengaged from the gear teeth of the gear main body by being pushed by the cam member when the cam member rotates.

That is, in this case, the pawl member is engaged with the gear teeth in a stable state with a sufficient pressing force as compared with a method in which the pawl member is directly pressed against the gear teeth by a compression coil spring or the like. Can be.

Further, in the first invention, it is more preferable that the claw member urging means is constituted by a tension coil spring which is bridged between the operation lever and the fixing bracket. desirable.

That is, in this case, since the urging force of the spring does not act on the operating force transmitting portion of the operating lever to the cam member or the like at the time of the lock release operation, the operating force transmitting portion has a strength greater than necessary. It is not necessary to have
The operating force transmitting unit can be configured by a simple member such as a folded piece.

In the first aspect of the present invention, the rotary fitting is fixed to the rotating shaft, and the rotary fitting biasing means is constituted by a spiral spring disposed on the outer surface of the outer plate on one side. The inner end of the spiral spring is fixed to the rotating shaft, the outer end is fixed to the outer plate on one side, and the biasing force of the spiral spring rotates the rotating bracket in a direction to close the fixed bracket. It is more preferable to adopt a configuration that is biased.

That is, when this configuration is adopted,
By the spiral spring having a large urging force, a sufficient rotational urging force can be applied to the rotary fitting.

Further, in the first aspect of the present invention, the gear main body can be securely connected to the rotary fitting main body by riveting the gear main body to the rotary fitting main body.

That is, the first invention more preferably employs a configuration in which rivets are used as fixing tools for fixing the gear body to the pair of inner plates.

On the other hand, the second invention specifies a reclining seat having the first invention as a main part.

That is, the second invention comprises a seat frame and a back frame, and the base end of the back frame is provided at a rear end of the seat frame. A reclining seat rotatably connected by an adjusting gear mechanism, wherein a rear end of the seat frame is fixed to the fixing bracket, and a base end of the back frame is fixed to the rotating bracket, The gist of the present invention is that the back frame is rotationally biased to the seat frame by the rotating bracket biasing means in the front standing direction.

[0022]

1 to 6 are views showing the periphery of a gear mechanism of a chair according to an embodiment of the present invention. As shown in these figures, in the chair of this embodiment, a rear end of a metal pipe seat frame (2) and a lower end (base end) of a metal pipe back frame (3) are provided. The gear mechanism (10) for angle adjustment is on one side (right side) between
Is provided.

The gear mechanism (10) has a fixing bracket (20) fixed to the seat frame (2) side and a rotating bracket (30) fixed to the back frame (3) side.

As shown in FIG. 7, the fixing bracket (20) is formed of an integrally molded product formed by press molding, and includes a pair of outer plates (21) and (21) which are arranged in a separated state and parallel to each other. And a cylindrical mounting portion (25) continuously provided on the base end side of the pair of outer plates (21).

The pair of outer plates (21) and (21) are connected to each other via a lower wall (21a) of the lower end thereof, and the upper ends thereof are bent inward to form upper bent pieces (21b) and (21b). )
And a pair of outer plates (21) and (21), a lower wall (21a), and upper bent pieces (21b) and (21b) form a substantially bag-like shape whose upper, lower, left, and right sides are substantially closed. .

A shaft mounting hole (22) is formed coaxially on the distal end side of the pair of outer plates (21) and (21), and the base end side of one outer plate (21) is A crescent-shaped operation hole (23) is formed.

As shown in FIGS. 1 to 6, the rotating fitting (30) includes a rotating fitting body (40) and a gear body (5).
0).

As shown in FIG. 8, the rotating bracket main body (40) is formed of an integrally molded product formed by press molding, and has a pair of inner plates (4) arranged in parallel in a separated state.
1) (41), and a tubular mounting portion (45) provided continuously on the base end sides of the pair of inner plates (41) and (41).

The pair of inner plates (41) and (41) are connected to each other via a lower wall (41a) at the lower end thereof, and the upper ends thereof are bent inward to form upper bent pieces (41b) and (41b). )
A pair of outer plates (21) and (21), a lower wall (41a), and upper bent pieces (41b) and (41b) form a substantially bag-like shape whose upper, lower, left and right sides are closed.

A hexagonal shaft mounting hole (42) is formed coaxially on the distal end side of the pair of inner plates (41) and (41) in the rotating metal fitting body (40), and a rivet is formed on the base end side. A mounting hole (43) is formed. Further, a total of four notches (44) are formed on the tip edges of the pair of inner plates (41) (41), two on each side.

As shown in FIG. 9, the gear body (50) is composed of a laminated plate in which two gear sector plates (51) and (51) of a deformed sector shape formed by punching a metal plate are laminated. Have been. Each gear component plate (51) (5
1) are formed in the same size and shape as described later, and have hexagonal shaft mounting holes (52) (5) in the center.
2) is formed. A plurality of gear teeth (55) are formed on the outer peripheral edge of the gear component plate (51) over substantially half a circumference, and a rivet mounting hole (53) is formed at an end on the side where the gear teeth (55) are not formed. Is formed.

Engagement projections (54) (54) are formed on the outer surface side of each gear component plate (51), corresponding to the notches (44) of the pair of inner plates (41) (41). ing. A connection protrusion (56a) is formed on substantially the same circumference as the engagement protrusion (54) on the upper inner surface side of one of the gear component plates (51), and a connection hole (56a) is formed on the lower portion. Have been. Further, a connection hole (56b) is formed in the upper part of the other gear component plate (51) corresponding to the connection protrusion (56a) of the one gear component plate (51), and a lower inner surface side is formed. A connection projection (56a) is formed corresponding to the connection hole (56b) of the one gear component plate (51).

The connecting projection (56a) of one gear component plate (51) is fitted and fixed in the connecting hole (56b) of the other gear component plate (51), and the other gear component plate (51). The coupling projection (56a) is fitted and fixed in the coupling hole (56b) of one of the gear component plates (51), and the two gear component plates (51) are laminated and integrated to form the gear body (50).
Is formed.

In the present embodiment, the two gear component plates (51) have the same configuration, and one side thereof is inverted so that the two gear component plates (51) are connected to each other between the connection protrusion (56a) and the connection hole (56b). A configuration is adopted in which they are opposed to each other and connected and integrated. Since the two gear component plates (51) have exactly the same configuration in this way, the gear component plate (51) can be efficiently manufactured, cost can be reduced, and a mold for manufacturing the gear component plate is provided. And the like can be used as one set, and the cost can be further reduced.

In the present embodiment, the gear body (50) is formed by laminating and integrating two gear component plates (51). However, the present invention is not limited to this. It is possible to form a thicker and higher-strength gear body (50) by laminating and integrating the above-mentioned gear constituent plates. However, in the case where the strength is not so required, or in a case where a gear component plate is manufactured by punching a thick metal plate, the gear body may be constituted by one gear component plate. .

The gear body (50) having the above-described structure is connected to and integrated with the rotating bracket body (40) to form the rotating bracket (30). That is, the gear body (50) is arranged between the pair of inner plates (41) and (41) of the rotating metal fitting body (40). At this time, the notch (44) of the pair of inner plates (41) and (41) accommodates the engagement protrusion (54) of the gear body (50), so that the pair of inner plates (41) and (41) are accommodated.
The gear body (50) is engaged and fixed in a positioning state, and the shaft mounting hole (52) and the rivet mounting hole (53) of the gear body (50) are aligned with the shaft mounting hole (42) of the inner plate (41).
And the rivet mounting hole (43).

Then, from one side, the rivet (1
1) is inserted into and fixed to the rivet mounting holes (43) and (53) of the inner plate (41) and the gear body (50), so that the rotating metal fitting body (40) and the gear body (50) are firmly connected to each other. The rotation fitting (30) is formed by being connected and integrated.

In this embodiment, as shown in FIG. 1, both side edges (59) and (59) of the gear body (50).
Is brought into contact with the lower wall (41a) of the inner plate (41) and the edge of the upper bent piece (41b) of the rotating metal fitting body (40), whereby the rotating metal fitting ( The connection (rotation stop) to (40) is made stronger.

The rotating fitting (30) having this configuration is rotatably attached to the fixing fitting (20). That is,
Between the pair of outer plates (21) and (21) of the fixing bracket (20), a pair of inner plates (41) and (41) of the rotating bracket (30).
Is arranged, and from one side surface, the rotation shaft (60)
The shaft mounting holes (2) for the fixing bracket (20) and the rotating bracket (30)
2) The rotary fitting (30) is rotatably attached to the fixing fitting (20) via the rotary shaft (60) by being inserted through the (42).

Here, as shown in FIG.
Is provided with a rotating bracket support portion (62) having a hexagonal cross section corresponding to the hexagonal shaft mounting hole (22) of the rotating bracket (30). The hexagonal rotation metal support (62) is provided with hexagonal shaft mounting holes (42) (52) in the rotation metal fitting body (40) and the gear main body (50).
The rotation shaft (60) is configured to rotate in conjunction with the rotation fitting (30) by being fitted around the shaft and being adapted to rotate around the shaft.

On the other hand, as shown in FIGS. 1 and 2, a cam member (70) and a claw member (8) are provided inside the fixture (20).
0) is accommodated.

The center of the cam member (70) is rotatably attached to the outer plate (21) of the fixture (20). One end of the cam member (70) has a rectangular hole (73) corresponding to the operation hole (23) of the fixing bracket (20).
Is formed, the other end is formed to be narrow, and the tip is formed in an arc-shaped cam (75).

The claw member (80) is provided on the gear body (50).
One end (81) is rotatably attached to the outer plate (21) of the fixture (20) so as to be arranged between the cam member (70) and the cam member (70). A plurality of lock claws (85) are formed on the edge of the other end of the claw member (80) facing the gear body (50), and the cam member (7) is formed.
A cam accommodating recess (87) is formed in a portion opposed to (0). Further, the cam receiving recess (87) in the claw member (80)
A pressing surface (88) is formed on one edge of the opening on one side.

Then, as shown in FIG.
0) rotates clockwise in the figure, and the cam (75) presses the pressing surface (88) of the claw member (80), and the claw member (80)
Is pressed in the counterclockwise direction in FIG.
0) is engaged with the gear teeth (55) of the gear body (50), and the fixing bracket (2) of the rotating bracket (30) is engaged.
2), the cam member (70) rotates counterclockwise in FIG. 2 so that the cam (75) is turned into the cam receiving recess (87) of the claw member (80). When the claw member (80) is rotated in the clockwise direction in the figure, the lock claw (85) of the claw member (80) is disengaged from the gear teeth (55), and the engagement is released. Metal fittings (3
It is configured so that rotation of the fixing bracket (0) with respect to the fixing bracket (20) is permitted.

As shown in FIGS. 4 and 10, the outer surface of one outer plate (21) of the fixing bracket (20) is
An operation lever (90) is rotatably mounted on the same rotation shaft as the cam member (70). The operation lever (90) includes a handle mounting piece (91) extending along the outer surface of the fixing bracket (20), a spring mounting piece (92) protruding outward, and an operation hole () of the fixing bracket (20). 23)
And an operating force transmitting piece (93) protruding inward. The operating force transmitting piece (93) is inserted through the operation hole (23) of the fixing bracket (20), and the fixing fitting ( 2
0), and the operating force transmitting piece (93) is inserted and arranged in the rectangular hole (73) of the cam member (70),
It is connected to the cam member (70).

A handle (not shown) is attached to a handle attachment piece (91) of the operation lever (90).
Hold this handle with your hand and move it to the operating lever (9
0) is configured to be rotated.

As shown in FIGS. 4 and 5, one end of a tension coil spring (12) as a claw member urging means is attached to a spring attachment piece (92) of the operation lever (90). The other end of (12) is a fixing bracket (20)
In an ordinary state, the operating lever (90) is rotationally urged clockwise in FIG. 1 by the urging force of the spring (12).

When the operating lever (90) is rotated counterclockwise in FIG. 2 against the urging force of the tension coil spring (12) by operating the handle (not shown) by hand. As the operation force transmitting piece (93) of the lever (90) rotates, the cam member (70) rotates counterclockwise, and as described above, the gear body (5) of the claw member (80).
0) is released to allow rotation of the rotating metal fitting (30). In this unlocked state, when the user releases his / her hand from a handle (not shown), the operating lever (90) is pulled by the tension coil spring. Due to the biasing force of (12), the cam member (70) rotates clockwise in FIG.
Is rotated, the engagement of the claw member (80) with the gear body (50) is released as described above, and the rotating metal fitting (30) is locked, and is held at the rotation angle. .

On the other hand, as shown in FIGS. 5 and 6, on the outer surface of the other outer plate (21) of the fixing bracket (20),
A spiral spring (13) is disposed as a rotating bracket urging means. The inner end of the spiral spring (13) is fixed to the rotation shaft (60) of the rotation fitting (30),
The outer end is fixed to the outer surface of the fixing fitting (20), and the rotating fitting (3) is pressed by the biasing force of the spiral spring (13).
0) is rotationally urged in the direction in which it is closed with respect to the fixing bracket (20), in other words, in the direction in which the back frame is lifted (the front standing direction).

As shown in FIG. 1, the cylindrical mounting portion (25) of the fixing bracket (20) in the gear mechanism (10) for angle adjustment having the above-described structure is attached to one rear end of one side of the seat frame (2). In the state of being fitted outside, it is fixed and welded by the rivet (2a). When a large-diameter pipe having a size slightly larger than the pipe size is used as the seat frame (2), FIG.
As shown in the figure, the cylindrical mounting portion (25) of the fixing bracket (20)
And the large-diameter seat frame (2) with the joint pipe (1
00) may be connected and fixed.

As shown in FIG. 1, similarly to the above, the cylindrical mounting portion (45) of the rotating bracket (30) in the gear mechanism (10) is attached to the lower end of one side of the back frame (3). In the fitted state, it is fixed and welded by the rivet (3a). Even in the case of using a large-diameter pipe having a slightly larger pipe size as the back frame (3), the cylindrical mounting portion (45) of the rotary fitting (30) is connected via the joint pipe in the same manner as in FIG. ) May be connected to the large-diameter back frame (3).

Thus, in the present embodiment, the right side between the rear end of the seat frame (2) and the lower end of the back frame (3) is connected by the gear mechanism (10), while the right side is not shown. Has no gear mechanism, and the two frames (2) and (3) are rotatably connected.

In the seat chair to which the gear mechanism (10) having the above structure is applied, pulling a handle (not shown),
For example, when the load on the backrest (back frame 3) is removed in a state where the operation lever (90) is rotated to unlock the rotation fitting (30), the rotation fitting is rotated by the urging force of the spiral coil spring (13). (30), that is, the back frame (3) rotates in the lifting direction. And
When the hand is released from the handle at a desired lifting angle, the operating lever (90) is returned to the initial state by the urging force of the extension coil spring (12), and the rotating bracket (30) is locked, whereby the spine frame (3) is locked. ) Is maintained at the desired angle.

Needless to say, in the unlocked state, for example, by applying a load to the back frame (3), the back frame (3) is tilted backward against the urging force of the spiral coil spring (13). It is also possible to release the lock in such a tilted state, so that the spine frame (3) can be maintained at the rotation angle.

As described above, according to the gear mechanism (10) for adjusting the angle of the chair according to the present embodiment, the rotating bracket (3) is used.
0) is composed of a rotating bracket main body (40) having a pair of inner plates (41) and (41) and a gear main body (50) separate from the main body (40). Since it is arranged between the pair of inner plates (41) and (41) and connected and integrated by riveting, unlike the case where gear teeth are integrally formed on the pair of inner plates, for example, the rotating bracket body Regardless of the thickness or shape of (40), the gear body (5
The thickness and shape of 0) can be freely set. Therefore, the gear teeth (55) can be formed thick and in a stable shape, so that the gear teeth (55) can have a sufficient strength, and a gear tooth reinforcing member or the like is not required. Accordingly, the number of parts can be reduced, the assembling work can be performed easily, and the cost can be reduced. Furthermore, since the gear teeth (55) have sufficient strength, the gear teeth (55) can be formed small, and the gear mechanism (1)
0) The overall size and weight can be reduced, and the number of teeth, that is, the number of steps when changing the backrest angle can be increased by the downsizing of the gear teeth (55), and the backrest angle can be finely adjusted. Comfortable sitting comfort for the user can be reliably provided.

In the present embodiment, the gear body (5
0), engaging projections (54) are formed on both side surfaces, and notches (44) are formed in the rotating bracket main body (40).
The gear main body (50) is engaged with the notch (44) by fitting the engagement projection (54) into the notch (44).
0), the engagement projection (54)
The positioning of the gear main body (50) with respect to the rotary fitting main body (40) can be easily achieved only by the fitting operation of the gear, and the assembling work can be performed more easily. Further, since the gear main body (50) is engaged with the rotary fitting main body (40), even with only one rivet (11), both can be reliably connected and integrated. Since it is not necessary to use a large number of fasteners for assembly, the number of components can be reduced, and in this regard, assembling work can be performed easily and the structure can be simplified.

In this embodiment, the claw members (8
0) is rotatably provided on the fixture (20), and the claw member (80) is rotated via the cam member (70) by the urging force of the tension coil spring (12) to rotate the gear body (50).
The claw member (80) is stably pressed with a sufficient pressing force as compared with a method in which the claw member is directly pressed against the gear teeth by, for example, a compression coil spring. And rattling can be reliably prevented. Further, as a biasing means for biasing the claw member (80) toward the gear body (50), a tension coil spring (12) bridged between the operation lever (90) and the fixing bracket (20) is used. Therefore, at the time of the lock release operation, the urging force of the spring (12) is applied to the operation force transmission piece (93) for transmitting the operation force of the operation lever (90) to the cam member (70) and the claw member (80). Does not act directly, it is not necessary to give the operating force transmitting piece (93) greater strength than necessary. For this reason, the operating force transmitting piece (93) can be constituted by a simple member such as a folded piece as in the present embodiment, and the components can be simplified, and the cost can be reduced.

Further, in the present embodiment, since the rotating metal fitting (30) is urged in a predetermined direction by the spiral spring (13), the lifting force is sufficiently applied to the back frame (3) in the rotating direction. And good operability can be obtained.

In the above embodiment, the case where the gear mechanism (10) is attached to only one side of the chair has been described. However, the present invention is not limited to this case. You may do it.

[0060]

As described above, according to the gear mechanism for adjusting the angle of the first aspect of the present invention, the rotating bracket is composed of the rotating bracket body having the pair of inner plates and the gear body separate from the body. Since the gear body is arranged between a pair of inner plates and connected and integrated by a fixing tool such as a rivet, the thickness of the gear body is reduced regardless of the thickness or shape of the rotating bracket body. The shape can be freely set, the gear teeth can be formed thick and stable, and the gear teeth can have sufficient strength. Accordingly, the number of parts can be reduced, so that the assembling work can be performed easily and the cost can be reduced.
Further, since the gear teeth can be reduced, the size and weight can be reduced, and the number of teeth, that is, the number of steps at the time of adjusting the angle of the rotating bracket can be increased, and the rotation angle can be finely adjusted. This has the effect.

In the first aspect of the present invention, when the gear main body is fixed to the rotary fitting main body by fixing the gear main body to the rotary fitting main body by fitting the engagement projection of the gear main body into the notch of the rotary fitting main body and engaging the same. The positioning of the gear body with respect to the rotating bracket body can be easily achieved only by the fitting operation of the gear body, and the assembling work can be performed more easily, and the gear body can be securely attached to the rotating bracket body with a small number of fixing tools. It is advantageous in that the number of parts can be reduced and the assembling work can be further simplified and the structure can be simplified.

In the first aspect of the present invention, when the gear body is formed by laminating a plurality of gear component plates made of a stamped press-formed product, the strength of the gear teeth is appropriately optimized according to the intended use. There is an advantage that the gear main body can be easily manufactured while setting to.

In the first aspect of the present invention, when the claw member rotatably provided on the fixing bracket is rotated via the cam member by the urging force of the urging means and pressed against the gear body, for example, By using a compression coil spring or the like, the claw member can be engaged with the gear teeth in a stable state with a sufficient pressing force, as compared with a method in which the claw member is directly pressed against the gear teeth.
There is an advantage that rattling or the like can be reliably prevented.

Further, in the first aspect of the present invention, when the claw member urging means is constituted by a tension coil spring between the operation lever and the fixing bracket, a cam member or the like of the operation lever at the time of unlocking operation is provided. Since the urging force of the spring does not act on the operating force transmitting portion to the, the operating force transmitting portion does not need to have an unnecessarily large strength. For this reason, the operating force transmitting unit can be formed by a simple member such as a folded piece, and there is an advantage that the constituent members can be simplified and the cost can be reduced.

In the first aspect of the present invention, when the rotating bracket urging means is constituted by a spiral spring attached to the outer surface of the fixed bracket, there is an advantage that a sufficient rotating biasing force of the rotating bracket can be secured. is there.

On the other hand, the second aspect of the present invention specifies the reclining seat to which the angle adjusting gear mechanism of the first aspect of the present invention is applied, and thus has the same effects as above.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing the periphery of an angle adjusting gear mechanism of a seat chair according to an embodiment of the present invention.

FIG. 2 is a side view showing the vicinity of a claw member in the gear mechanism of the embodiment in an unlocked state.

FIG. 3 is an exploded perspective view showing the gear mechanism of the embodiment.

FIG. 4 is a side view showing the gear mechanism of the embodiment.

FIG. 5 is a plan view showing the gear mechanism of the embodiment.

FIG. 6 is another side view showing the gear mechanism of the embodiment.

FIG. 7 is a side sectional view showing a fixing bracket in the gear mechanism according to the embodiment.

FIG. 8 is a side cross-sectional view showing a rotary fitting main body in the gear mechanism of the embodiment.

9A and 9B are diagrams showing a gear body in the gear mechanism according to the embodiment, wherein FIG. 9A is a side view, FIG. 9B is a plan view showing the disassembled state, and FIG. It is an exploded sectional view which follows an XX line of (a).

10A and 10B are diagrams illustrating an operation lever in the gear mechanism according to the embodiment, wherein FIG. 10A is a side view and FIG. 10B is a plan view.

FIG. 11 is a side sectional view showing a seat frame connecting portion of a gear mechanism as a modification of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 ... Seat frame 3 ... Back frame 10 ... Angle adjustment gear mechanism 11 ... Rivet (fixing tool) 12 ... Tension coil spring (claw member urging means) 13 ... Spiral spring (rotary metal bracket urging means) 20 ... Fixed metal fitting 21 ... Outer plate 30 ... Rotating bracket 40 ... Rotating bracket body 41 ... Inner plate 44 ... Notch 50 ... Gear body 51 ... Gear component plate 54 ... Engaging projection 55 ... Gear teeth 60 ... Rotating shaft 70 ... Cam member 80 ... Claw member 90 ... Operation lever

Claims (8)

[Claims] 1. A fixing bracket having a pair of outer plates arranged parallel and spaced apart from each other; a pair of inner plates arranged parallel and spaced apart from each other; And a gear having a gear body provided with gear teeth on a part of the outer periphery, wherein the gear body is arranged between the pair of inner plates, and a rotating bracket integrally connected via a fixing tool, A rotating shaft for rotatably supporting the rotating fitting in a state where the rotating fitting is disposed between the pair of outer plates; a rotating fitting biasing unit for biasing the rotating fitting to one side in a rotation direction; Are provided between the outer plates of the gear body so as to be freely engageable and disengageable with the gear teeth of the gear body. When the gear teeth are engaged with the gear teeth, the rotation of the rotation metal fitting is restricted. A pawl member to be allowed; An angle comprising: a claw member urging means for urging in a direction to be engaged; and an operation lever for disengaging the claw member from the gear teeth against the urging force of the claw member urging means. Gear mechanism for adjustment. 2. An engaging projection is provided on an outer surface of the gear body, while a cutout portion is provided on the pair of inner plates corresponding to the engaging projection, and the engaging protrusion is housed in the cutout portion. 2. The angle adjusting gear mechanism according to claim 1, wherein the gear mechanism is engaged in a fixed position. 3. The gear body according to claim 1, wherein the gear body comprises a plurality of gear component plates laminated in the axial direction, and each gear component plate comprises a press-formed product obtained by stamping a metal plate. 2. The gear mechanism for angle adjustment according to 2. 4. A cam member is rotatably provided between the pair of outer plates corresponding to the claw members, and the operation lever is rotatably attached to an outer surface of the outer plate on one side. The cam member is configured to be rotated by a rotation operation of an operation lever, the claw member is rotatably provided on the pair of outer plates, and the cam member is rotated with the rotation operation of the operation lever. The gear mechanism for angle adjustment according to any one of claims 1 to 3, wherein the claw member is disengaged from the gear teeth of the gear body by being pushed by the cam member. 5. The angle adjusting device according to claim 1, wherein said claw member urging means is constituted by a tension coil spring bridged between said operation lever and said fixing bracket. Gear mechanism. 6. The rotary fitting is fixed to the rotating shaft, and the rotary fitting biasing means includes a spiral spring disposed on an outer surface of the outer plate on one side. An end is fixed to the rotating shaft, an outer end is fixed to the outer plate on one side, and the rotating metal is rotationally urged in a direction to close the fixing metal by the urging force of the spiral spring. The angle adjusting gear mechanism according to claim 1. 7. The angle adjusting gear mechanism according to claim 1, wherein a rivet is used as a fixing tool for fixing the gear body to the pair of inner plates. 8. A seat frame and a back frame, wherein a base end of the back frame is provided at a rear end of the seat frame.
A reclining seat rotatably connected by the angle adjusting gear mechanism according to any one of claims 1 to 7, wherein a rear end of the seat frame is fixed to the fixing bracket and the back frame. A base end portion of the reclining seat is fixed to the rotating bracket, and the back frame is urged to rotate forward in the upright direction with respect to the seat frame by the rotating bracket biasing means.