JP5262333B2 - Spiral spring mounting structure - Google Patents

Description

  The present invention relates to a mounting structure for a spiral spring that biases a seat back forward or backward with respect to a seat cushion in a vehicle seat installed in a vehicle.

  Conventionally, a vehicle seat installed in a vehicle includes a seat cushion on which a seated person sits and a seat back that serves as a backrest for the seated person, and for setting the position of the seat back with respect to the seat cushion. A device provided with a reclining device is known. In a vehicle seat provided with such a reclining device, a spiral spring that urges the seat back so as to tilt forward (in the forward tilt direction) is generally attached (see, for example, Patent Document 1). .

The spiral spring that urges the seat back forward is formed in a spiral shape with a metallic material having elasticity, and the outer end hook-like portion serving as the outer end is locked to the seat cushion side, and the inner end and The inner end side hook-like portion is locked to the seat back side, and the seat back is urged forward by using its elastic restoring force.
In the disclosed spiral spring mounting structure, a locking member that matches the hook shape is used to lock the inner end side hook-like portion, and this locking member is fixed to the frame of the seat back. It is fixedly installed on the bracket to be installed.
JP2007-54258

  However, in the above-described spiral spring mounting structure, in order to lock the inner end side hook-shaped portion, the locking member for locking the inner end side hook-shaped portion and the locking member are fixedly installed. The two brackets and the bracket were required. Accordingly, when the inner end side hook-shaped portion is locked, there is a problem that the manufacturing cost becomes expensive due to an increase in the number of parts.

  Further, when welding the locking member to the bracket, it is necessary to secure a welding point in the locking member, which increases the size of the locking member. This has caused a problem that the space on the inner end side of the spiral spring cannot be secured. If the space on the inner end side of the spiral spring cannot be secured, the outer diameter of the spiral spring becomes large because the number of turns of the spiral spring that provides an appropriate biasing force is secured, and the spiral spring cannot be made compact. Such a problem will occur.

  The present invention has been made in view of such circumstances, and the problem to be solved by the present invention is a mounting structure for a spiral spring that urges the seat back to be tilted forward or backward with respect to the seat cushion. Therefore, the manufacturing cost can be reduced by reducing the number of parts, and the volume on the inner end side of the spiral spring can be reduced to make the spiral spring compact while ensuring a large number of turns.

In order to solve the above problems, the spiral spring mounting structure according to the present invention employs the following means.
That is, the spiral spring mounting structure according to the first aspect of the present invention is a spiral spring that is attached to a vehicle seat installed in a vehicle and urges the seat back to be moved forward or backward. The inner end of the spiral spring has an inner end side hook-like portion that is engaged with either the seat cushion or the seat back, and either the seat cushion or the seat back. A bracket-like member is fixedly installed on the side, and the inner end side hook-like portion of the spiral spring is housed and held in a groove-like portion provided in the bracket-like member, whereby the seat cushion or the seat It is characterized by being engaged with either side of the back.

According to this spiral spring mounting structure, the inner end of the spiral spring has an inner end hook-like portion that is engaged with either the seat cushion or the seat back, and is provided on either side of the seat cushion or the seat back. A bracket-like member is fixedly installed, and the hook-like portion on the inner end side of the spiral spring is received and held by a groove-like portion provided in the bracket-like member, thereby locking with either the seat cushion or the seat back. Therefore, when attaching the spiral spring that biases the seat back forward or backward, the inner end can be locked by one member of the bracket-like member.
As a result, the number of parts can be reduced, the manufacturing cost can be reduced, the bulkiness on the inner end side of the spiral spring can be reduced, and the number of turns of the spiral spring can be increased while being compact. .

  The spiral spring mounting structure according to the second invention is the spiral spring mounting structure according to the first invention, wherein the seat back is tilted forward or backward with respect to the seat cushion, and the seat back is moved to a desired position. A rotation lock mechanism for fixing the rotation lock mechanism is provided, and the bracket-like member is provided in a proximity position of the rotation lock mechanism.

According to this attachment structure of the spiral spring, a rotation lock mechanism is provided for fixing the seat back to a desired position by tilting the seat back forward or backward with respect to the seat cushion, and the bracket-like member is provided close to the rotation lock mechanism. Since it is provided at the position, the spiral spring can be installed without interfering with the function of the rotation lock mechanism, while the seat back can be moved forward or backward and fixed at a desired position.
The state of “provided in the proximity position of the rotation lock mechanism” is, for example, a state of “arranged in parallel with the rotation lock mechanism on the rotation axis of the rotation lock mechanism”. .

A spiral spring mounting structure according to a third aspect of the present invention is the spiral spring mounting structure according to the first aspect or the second aspect of the present invention, wherein the bracket-like member is formed by bending a single rigid wire. A groove-shaped part is formed and configured.
According to this spiral spring mounting structure, since the bracket-like member is formed by forming a groove-like portion by bending one rigid wire, the bracket-like member provided with the groove-like portion is formed. In doing so, the structure can be made as small as possible while being easily formed.

  In addition, as a bracket-like member configured by forming a groove-like portion by bending the one rigid wire, the groove-like portion is formed by bending one rigid wire in a spiral shape. What was comprised etc. are mentioned. In this way, when one rigid wire is bent into a spiral shape to form a groove-like portion, the groove-like portion is connected in a diagonal direction by one rigid wire. The tensile strength with respect to the direction can be improved, and the holding force of the inner end side hook-like portion can be improved.

According to the attachment structure of the spiral spring according to the first aspect of the present invention, the inner end of the spiral spring can be locked by one member of the bracket-like member, so that the number of parts can be reduced. By making the manufacturing cost low and reducing the bulkiness on the inner end side of the spiral spring, it is possible to make the spiral spring compact while ensuring a large number of turns.
According to the spiral spring mounting structure of the second invention, the spiral spring can be installed without hindering the function of the rotation lock mechanism while the seat back can be tilted forward or backward and fixed at a desired position. Can do.
According to the spiral spring mounting structure according to the third aspect of the present invention, it is possible to easily form the bracket-like member having the groove-like portion that holds the inner end side hook-like portion from both sides and is fixedly held. However, the configuration can be made as small as possible.

[First Embodiment]
The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a side view schematically showing a vehicle seat 10 including a coupling mechanism 20 having a spiral spring mounting structure.
As shown in FIG. 1, the vehicle seat 10 includes a seat cushion 11 on which a seated person sits and a seat back 15 that serves as a backrest of the seated person, and the seat back 15 is moved forward or backward with respect to the seat cushion 11. Thus, the seat back 15 has a reclining function for fixing the seat back 15 at a desired position.

The seat cushion 11 includes a seat cushion frame 12 that serves as a framework and an appropriate pad member (not shown) that serves as a cushion material. The seat back 15 also includes a seat back frame 16 serving as a framework and an appropriate pad (not shown) serving as a cushion material.
The seat cushion frame 12 and the seat back frame 16 are connected by a connecting mechanism 20 having a spiral spring mounting structure according to an embodiment described below, and are relatively rotated.

FIG. 2 is a side view showing the coupling mechanism 20 having a spiral spring mounting structure according to the embodiment. FIG. 3 is a cross-sectional view of the coupling mechanism 20 of FIG. FIG. 4 is an exploded perspective view showing the coupling mechanism 20 of FIG.
That is, as shown in FIGS. 2 to 4, the connecting mechanism 20 is roughly a seat cushion side bracket 21, a seat back side bracket 25, and a reclining mechanism 30 provided so as to be sandwiched between the brackets 21 and 25. And an urging mechanism 40 provided at a position close to the reclining mechanism 30. This urging mechanism 40 is attached using the spiral spring attachment structure according to the embodiment.

The seat cushion side bracket 21 is fixedly installed on the seat cushion frame 12 by welding, and is provided with a dowel insertion hole 22 for attaching a reclining mechanism 30 described later by welding.
The seat back side bracket 25 is fixedly installed on the seat back frame 16 by welding, and is provided with a dowel insertion hole 26 for attaching a reclining mechanism 30 described later by welding.

  The reclining mechanism 30 corresponds to the rotation lock mechanism according to the present invention. The reclining mechanism 30 has a disk shape, includes a relatively rotating guide 31 and a ratchet 32, and is integrated and configured by caulking with a ring member 33. Although the detailed illustration of the guide 31 and the ratchet 32 is omitted, teeth that mesh with each other are cut on the opposing contact surfaces, and an appropriate cam (not shown) is accommodated between the guide 31 and the ratchet 32. Has been.

  Here, the guide 31 of the reclining mechanism 30 configured in this manner is fixed by fitting a dowel (not shown) into the above-described seat cushion side bracket 21 by fitting a dowel fitting hole 22 (see FIG. 4). Is done. Further, the ratchet 32 of the reclining mechanism 30 is fixed to the above-described seat back side bracket 25 by fitting the dowel 32a with the dowel fitting hole 26 (see FIG. 4) and welding.

  As shown in FIG. 3 (only FIG. 3 is shown), the reclining mechanism 30 is fitted with an operation cam 34 for operating the above-described appropriate cam and an operation shaft 35 for operating the operation cam 34. Has been. The operation shaft 35 is connected to an external operation lever (not shown) via an operation connecting member 36 and is attached in a rotation restricting direction by an energizing spiral spring 37 that restricts relative rotation of the guide 31 and the ratchet 32. It is energized.

  In this way, the reclining mechanism 30 is connected to the guide 31 via the operation cam 34 and an appropriate cam by the biasing force of the biasing spiral spring 37 when the seated person does not operate the external operation lever. The ratchet 32 is engaged with each other, and relative rotation between the guide 31 and the ratchet 32 is restricted. In contrast, when the seated person operates the external operation lever against the urging force of the urging spiral spring 36, the reclining mechanism 30 is connected to the guide 31 and the ratchet via the operation cam 34 and an appropriate cam. The guide 31 and the ratchet 32 can be rotated relative to each other.

Next, the urging mechanism 40 provided at a close position adjacent to the reclining mechanism 30 will be described. The urging mechanism 40 includes a spiral spring 41 that urges the seat back 15 to move forward with respect to the above-described seat cushion 11.
That is, as shown in FIGS. 2 to 4, the urging mechanism 40 is disposed in parallel with the reclining mechanism 30 on the rotational axis of the reclining mechanism 30, and is roughly configured by a spiral spring 41, The spiral spring 41 is configured to include two bracket-like members 51 and 61 for locking both ends of the spiral spring 41.

The spiral spring 41 is formed in a spiral shape as shown in the drawing, and an outer end side hook-like portion 42 is formed at the outer end thereof, and an inner end side hook-like portion 43 is formed at the inner end thereof. Has been.
Specifically, the outer end hook-like portion 42 is a portion that is locked to the outer end bracket-like member 51 on the seat cushion 11 side, and is bent outwardly against the spiral direction. Is formed. Further, the inner end hook-shaped portion 43 is a portion that is locked to the inner end bracket-like member 61 on the seat back 15 side, and is formed so as to be bent inward from the spiral direction. .

The spiral spring 41 formed in this way has an outer end side hook-like part 42 and an inner end side hook-like part 43 on an outer end side bracket-like member 51 and an inner end side bracket-like member 61 configured as follows. Is to be locked.
That is, the outer end side bracket-like member 51 to which the outer end side hook-like portion 42 is locked is formed in an L shape in a side view as shown in FIGS. The fixed plate portion 52 and the locking protrusion plate portion 53 for locking the outer end side hook-like portion 42 are provided.
The fixed plate portion 52 is welded and fixed to the seat cushion side bracket 21. In addition, the outer end side hook-like portion 42 of the spiral spring 41 is locked to the locking protruding plate portion 53.

Further, the inner end side bracket-like member 61 that the inner end side hook-like portion 43 engages is configured by forming a groove-like portion 62 by bending one rigid wire.
The rigidity strength of the rigid wire is such that when the inner end side hook-like portion 43 is locked by accommodating and holding the inner end side hook-like portion 43 in the groove-like portion 62, the groove-like portion The strength is such that 62 is not elastically deformed.

FIG. 5 is an enlarged view of the locking portion showing the locking portion in the side view of FIG. 2 in an enlarged manner.
That is, as shown in FIGS. 4 and 5, the inner end side bracket-like member 61 is configured by forming a groove-like portion 62 by winding and bending one rigid wire in a substantially spiral shape. Specifically, the groove-like portion 62 of the inner end side bracket-like member 61 includes two wall-like portions 621 and 622 that are bent in a U-shape, and U-shaped opening-side diagonals of these wall-like portions 621 and 622. A connecting portion 623 that connects the positions is formed.

  The inner end bracket-like member 61 is formed with two weld fixing parts 63 and 64 so as to extend in a direction orthogonal to the groove direction of the groove-like part 62. In other words, both ends 65 and 66 of the rigid wire forming the inner end side bracket-like member 61 extend in the extending direction in the direction intersecting the groove direction of the groove-like portion 62 (with the force (reference symbol K)). The two welding fixing parts 63 and 64 are formed at symmetrical positions extending in the extending direction.

The inner end side bracket-like member 61 configured as described above is welded and fixed to the seatback side bracket 25 by welding fixing portions 63 and 64, and the inner end side hook-like portion 43 is accommodated and held by the groove-like portion 62. Thus, the inner end side hook-like portion 43 is locked.
The inner end side bracket-like member 61 can receive a fixing support force from the welding fixing portions 63 and 64 by welding and fixing the welding fixing portions 63 and 64 to the seat back side bracket 25, so that the groove The spiral shape forming the shaped portion 62 can be stably maintained.

As described above, according to the coupling mechanism 20 having the spiral spring mounting structure according to the embodiment, the following operational effects can be achieved.
That is, according to the connecting mechanism 20, the inner end side hook-like portion 43 is formed at the inner end of the spiral spring 41, and the inner end side bracket 25 is fixed to the seat back side bracket 25 fixedly installed on the seat back frame 16. The member 61 is fixedly installed, and the inner end side hook-like portion 43 of the spiral spring 41 is accommodated and held by a groove-like portion 62 provided in the inner end side bracket-like member 61. As a result, the seat back 15 is locked, so that when the spiral spring 41 that urges the seat back 15 forward is attached, the engagement of the inner end side hook-like portion 43 serving as the inner end thereof is established. The stop can be locked by one member of the inner end side bracket-like member 61.
Therefore, the number of parts can be reduced, the manufacturing cost can be reduced, the bulkiness of the inner end side of the spiral spring 41 can be reduced, and the number of turns of the spiral spring can be increased while being compact. .

  According to the connecting mechanism 20, the reclining mechanism 30 is provided that moves the seat back 15 forward relative to the seat cushion 11 and fixes the seat back 15 at a desired position, and the inner end side bracket-like member 61 is provided with the reclining mechanism 30. Since the seat back 15 can be moved forward and fixed at a desired position, the spiral spring 41 can be installed without hindering the function of the reclining mechanism 30.

  According to the connecting mechanism 20, the inner end side bracket-like member 61 is formed by forming a groove-like portion 62 by bending a single rigid wire. In forming the end-side bracket-like member 61, the end-side bracket-like member 61 can be easily formed, but can be configured as small as possible.

  Further, as shown in FIG. 5, in forming the inner end side bracket-like member 61, it is configured by forming a groove-like portion 62 by bending one rigid wire into a spiral shape. The inner end side bracket-like member 61 is connected to the diagonal direction (symbol L), and can receive a fixing support force from the welding fixing portions 63 and 64, thereby stabilizing the spiral shape forming the groove-like portion 62. Can be maintained. That is, the inner end side bracket-like member 61 has improved tensile pressing strength with respect to the diagonal direction (symbol L) and the spiral direction (symbol M).

Therefore, the inner end side hook-like portion 43 accommodated and held by the groove-like portion 62 applies a force (reference numeral K) to the inner end-side bracket-like member 61 by the elastic force of the spiral spring 41. The inner end side bracket-like member 61 can be supported by being distributed in the diagonal direction (reference L) and the spiral direction (reference M) with improved tensile pressing strength against this force (reference K).
In this way, the inner end side bracket-like member 61 has improved accommodation and holding force of the inner end side hook-like portion 43, and the inner end-side hook-like portion 43 can be stably locked.

[Second Embodiment]
Next, based on FIG. 6, a second embodiment having a configuration different from the above-described coupling mechanism 20 will be described. That is, the connecting mechanism 20A having the spiral spring mounting structure according to the second embodiment is obtained by changing the configuration of the inner end side bracket-like member 61 of the connecting mechanism 20 described above. Are configured identically. Therefore, in the following, this modified inner end side bracket-like member 61A will be described, and other identically configured portions will be denoted by the same reference numerals and description thereof will be omitted.

FIG. 6A is a side view showing a coupling mechanism 20A having a spiral spring mounting structure according to the second embodiment. FIG. 6B is an enlarged perspective view of the inner end side bracket-like member 61A used for the coupling mechanism 20A.
That is, the connecting mechanism 20A includes an urging mechanism 40A as shown in FIGS. 6 (A) and 6 (B). In the urging mechanism 40A, the inner end side bracket-like member 61A is fixedly installed on the seat back side bracket 25 described above, and the inner end side hook-like portion 43 of the spiral spring 41 is provided in the inner end side bracket-like member 61A. By being housed and held by the shaped part 62A, the seat back 15 is locked.

  The inner end side bracket-like member 61A is formed by bending a rectangular plate-like member, and is provided with a groove-like portion 62A by notching at a central portion. Further, the inner end side bracket-like member 61A is provided with weld fixing portions 63A and 64A which are welded and fixed to the seat back side bracket 25 along the groove direction of the groove-like portion 62A.

According to the connecting mechanism 20A configured as described above, the inner end side bracket-like member 61A is fixedly installed on the seatback side bracket 25 fixedly installed on the seatback frame 16, as in the first embodiment. The inner end side hook-like portion 43 of the spiral spring 41 is held and held by the groove-like portion 62A provided in the inner end side bracket-like member 61A, thereby being engaged with the seat back 15 side. Therefore, when attaching the spiral spring 41 that urges the seat back 15 forward, the inner end side hook-like portion 43 serving as the inner end is locked by one member of the inner end side bracket-like member 61A. Can be stopped.
As a result, the number of parts can be reduced, the manufacturing cost can be reduced, the bulkiness on the inner end side of the spiral spring 41 can be reduced, and the number of turns of the spiral spring can be increased while being compact. it can.

Further, according to this connecting mechanism 20A, the groove-like portion 62A that accommodates and holds the inner-end-side hook-like portion 43 is formed as a part of the inner-end-side bracket-like member 61A having a bracket function. It is possible to improve the rigidity of the groove-shaped portion 62A when the side hook-shaped portion 43 is accommodated and held.
Accordingly, when the inner end side hook-like portion 43 serving as the inner end of the spiral spring 41 is locked, the locking can be made more stable.

[Third Embodiment]
Next, a third embodiment, which is a modification of the second embodiment, will be described with reference to FIG. In other words, the coupling mechanism 20B having the spiral spring mounting structure according to the third embodiment is obtained by changing the configuration of the inner end side bracket-like member 61A of the coupling mechanism 20A described above. Are configured identically. Therefore, in the following, this modified inner end side bracket-like member 61B will be described, and other identically configured portions will be denoted by the same reference numerals and description thereof will be omitted.

FIG. 7A is a side view showing a coupling mechanism 20B having a spiral spring mounting structure according to the third embodiment. FIG. 7B is an enlarged perspective view of the inner end side bracket-like member 61B used for the coupling mechanism 20B.
That is, the coupling mechanism 20B is configured to include an urging mechanism 40B as shown in FIGS. 7 (A) and 7 (B). In the urging mechanism 40B, the inner end side bracket-like member 61B is fixedly installed on the seatback side bracket 25 described above, and the inner end side hook-like portion 43 of the spiral spring 41 is provided in the inner end side bracket-like member 61B. By being accommodated and held by the shape portion 62B, the seat portion 15 is locked.

  The inner end side bracket-like member 61B is formed by drawing a plate-like member appropriately cut out, and is provided with a groove-like portion 62B at the center portion by notching. A rib portion 65B formed by drawing is provided at the central portion where the groove-like portion 62B is provided. The inner end side bracket-like member 61B is provided with weld fixing portions 63B and 64B which are welded and fixed to the seat back side bracket 25 along the groove direction of the groove-like portion 62B. The welding fixing portions 63B and 64B are formed so as to expand in a fan shape.

According to the connecting mechanism 20B configured in this manner, the inner end side bracket-like member 61B is fixedly installed on the seatback side bracket 25 fixedly installed on the seatback frame 16, as in the second embodiment. Then, the inner end side hook-like portion 43 of the spiral spring 41 is received and held by the groove-like portion 62B provided in the inner end side bracket-like member 61B, thereby being engaged with the seat back 15 side. Therefore, when attaching the spiral spring 41 that urges the seat back 15 forward, the inner end hook-like portion 43 serving as the inner end is locked by one member of the inner end bracket-like member 61B. Can be stopped.
As a result, the number of parts can be reduced, the manufacturing cost can be reduced, the bulkiness on the inner end side of the spiral spring 41 can be reduced, and the number of turns of the spiral spring can be increased while being compact. it can.

Further, according to the connecting mechanism 20B, the rib portion 65B is formed at the central portion where the groove-like portion 62B that accommodates and holds the inner-end side hook-like portion 43 is formed. It is possible to improve the rigidity of the groove-like portion 62A when accommodating and holding the.
Accordingly, when the inner end side hook-like portion 43 serving as the inner end of the spiral spring 41 is locked, the locking can be made more stable.

In addition, in the attachment structure of the spiral spring which concerns on this invention, it is not limited to above-described embodiment, In the range which does not change the summary of this invention, it can change suitably.
That is, the urging mechanism 40 attached using the spiral spring attachment structure of the above embodiment urges the seat cushion 11 so as to push the seat back 15 forward. However, the attachment structure of the spiral spring according to the present invention is not limited to this, and it may be configured to urge the seat back 15 to tilt backward with respect to the seat cushion 11. Good. In that case, the outer end side hook-like portion 42 of the spiral spring 41 is locked to the outer end side bracket-like member 51 from the opposite side to the above embodiment.

  Further, in the biasing mechanism 40 attached using the spiral spring attachment structure of the above-described embodiment, the outer end side bracket-like member 51 that the outer end side hook-like portion 42 engages is fixed to the seat cushion 11 side. The inner end side bracket-like member 61 that is installed and locked by the inner end side hook-like portion 43 is fixedly installed on the seat back 15 side. However, the attachment structure of the spiral spring according to the present invention is not limited to this, and conversely, the outer end side bracket-like member 51 to which the outer end side hook-like portion 42 is engaged is provided in the seat back. The inner end side bracket-like member 61 fixedly installed on the 15th side and locked by the inner end side hook-like portion 43 may be fixedly installed on the seat cushion 11 side.

In addition, the rotation lock mechanism according to the present invention is not limited to the configuration of the reclining mechanism 30 described above, and has a function of fixing the seat back to a desired position by moving the seat back forward or backward with respect to the seat cushion. An appropriate configuration can be selected.
Further, the bracket-like member constituted by bending one rigid wire according to the present invention is not limited to the above-described spirally wound and bent member, and a groove-like portion is formed. Thus, there is no problem as long as it is bent, and the shape of the bracket-like member itself can be selected as appropriate.

It is a side view which shows typically a vehicle seat provided with a connection mechanism. It is a side view which shows the connection mechanism with the attachment structure of a spiral spring. It is sectional drawing which shows the III-III cross-section arrow of the connection mechanism of FIG. It is a disassembled perspective view which shows the connection mechanism of FIG. It is a locking part enlarged view which expands and shows a locking part. It is the side view of the connection mechanism which has the attachment structure of the spiral spring used as 2nd Embodiment, and the expansion perspective view of an inner end side bracket-like member. It is the side view of the connection mechanism which has the attachment structure of the spiral spring used as 3rd Embodiment, and the expansion perspective view of an inner end side bracket-like member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle seat 11 Seat cushion 12 Seat cushion frame 15 Seat back 16 Seat back frame 20 Connection mechanism 21 Seat cushion side bracket 25 Seat back side bracket 30 Reclining mechanism 31 Guide 32 Ratchet 33 Ring member 34 Operation cam 35 Operation shaft 36 Operation connecting member 37 Energizing spiral spring 40 Energizing mechanism 41 Spiral spring 42 Outer end side hook-like part 43 Inner end side hook-like part 51 Outer end side bracket-like member 52 Fixed plate part 53 Locking projecting plate part 61 Inner end side Bracket-shaped member 62 Groove-shaped portion 621, 622 Wall-shaped portion 623 Connection portion 63, 64 Weld fixing portion

Claims (2)

A mounting structure of a spiral spring that is attached to a vehicle seat installed in a vehicle and biases the seat back forward or backward with respect to the seat cushion,
The inner end of the spiral spring has an inner end hook-like portion that is engaged with either the seat cushion or the seat back,
A bracket-like member is fixedly installed on either side of the seat cushion or the seat back,
The inner end side hook-like portion of the spiral spring is received and held in a groove-like portion provided in the bracket-like member, and is thereby locked with either the seat cushion or the seat back. We have been,
A mounting structure for a spiral spring, wherein the bracket-like member is formed by forming the groove-like portion by bending a single rigid wire . In the spiral spring mounting structure according to claim 1,
A rotation lock mechanism is provided for moving the seat back forward or backward with respect to the seat cushion and fixing the seat back to a desired position.
A mounting structure for a spiral spring, wherein the bracket-like member is provided in a proximity position of the rotation lock mechanism.

Images