JP5087082B2 - Seat belt retractor - Google Patents

Description

  The present invention relates to a seat belt retractor installed in a vehicle.

  BACKGROUND ART A seat belt device provided in a vehicle seat is a device that restrains an occupant's rapid movement due to an acceleration generated at the time of a vehicle collision and thereby makes the occupant's body safe. This seat belt device generally includes a seat belt (webbing), a seat belt retractor, a buckle device, and the like.

  The retractor winds a seat belt around a winding member (spool) and pulls it in by a spring force, and normally accommodates the seat belt in the retracted state. When the occupant wears a seat belt, the seat belt accommodated is pulled out by pulling the tongue plate provided at one end opposite to the seat belt winding side, and this is engaged with the buckle device provided beside the seat. So, put on your seat belt.

  The retractor configured as described above locks the pull-out of the seat belt from the take-up member at the time of a collision in which an impact is applied, and restrains the body of the occupant moving rapidly forward by the locked seat belt. Here, a pretensioner and a lock mechanism are usually provided in order to restrain the occupant's body more strongly, particularly during sudden deceleration of the vehicle.

The pretensioner removes the slack of the seat belt when the acceleration sensor detects that the vehicle is suddenly decelerated, and improves the restraint force by the seat belt. The locking mechanism includes a locking member (locking base) that rotates together with the spool. And according to the detection signal of the acceleration sensor, the locking member (pawl) provided on the locking base is locked to the internal teeth (ratchet teeth) provided on the fixed side member (retractor frame etc.) of the vehicle, The rotation of the locking base and the spool in the pull-out direction is restricted (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 3-279058

  However, the seat belt retractor described in Patent Literature 1 and the like has a large number of components such as an acceleration sensor and a winding mechanism inside, and there is a problem that these components vibrate together with the vibration of the vehicle. In addition, there is an adverse effect that the hitting sound between these components leaks into the vehicle.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a seat belt retractor that reduces noise generated from the lock mechanism and has higher quietness.

A seatbelt retractor according to the present invention is a seatbelt retractor installed in a vehicle, a pair of side plates arranged opposite to each other, a spool that is installed between the side plates and around which a seat belt is wound, and the side plate A lock mechanism for restraining rotation of the spool, a resin housing member for housing the lock mechanism, and a metal fixed to the outer wall or the inner wall of the housing member. A metal plate or a cylindrical member, and the metal member is attached to an outer wall or an inner wall of the housing member via an adhesive member, and is attached to the outer wall or the inner wall of the housing member. Has an annular rib projecting, and the metal member is an annular plate having an outer diameter substantially the same as the inner diameter of the annular rib, Characterized in that that is affixed to the outer wall or inner wall of the housing member surrounded by said annular rib.

The seat belt retractor according to the present invention is characterized in that the adhesive member is a double-sided tape .

  The seat belt retractor according to the present invention is characterized in that the metal plate is half-punched and attached to the outer wall of the housing member.

  The seat belt retractor according to the present invention is characterized in that the resin-made housing member supports the spool.

  In the present invention, a spool is installed between a pair of side plates arranged opposite to each other, and the spool around which the seat belt is wound winds and unwinds the seat belt. The lock mechanism is attached to the outer surface of the side plate and restrains the rotation of the spool. The resin housing member is attached to the outer surface of the side plate and houses the lock mechanism. A metal member is fixed to the outer wall or the inner wall of the housing member. The metal member is, for example, a plate or a cylindrical member, and the metal member is fixed to the inner wall or the outer wall of the housing member by an adhesive member.

  In the present invention, an annular rib projects from the outer wall or inner wall of the housing member. The metal member is an annular plate having an outer diameter substantially the same as the inner diameter of the annular rib. The annular plate is attached to the outer wall or the inner wall of the housing member surrounded by the annular rib via an annular double-sided tape as an adhesive member.

  In the present invention, the metal member is fixed to the outer wall or the inner wall of the resin housing member via the adhesive member. As a result, the metal member attenuates the vibration, and it is possible to greatly reduce the noise in the vehicle that accompanies the vibration of each component as well as the vibration of the vehicle.

  In the present invention, an annular rib projects from the housing member outer wall or inner wall, and the annular plate is attached to the outer wall or inner wall of the housing member surrounded by the annular rib via an annular double-sided tape. . Accordingly, the strength of the resin-made housing member is increased by the ribs, and the protrusions by the ribs serve as marks when the annular plate is attached, and the annular plate is easily attached to the ribs projected in advance in consideration of the weight balance. It becomes possible. In addition, the present invention has excellent effects such as vibration can be damped more effectively and further silence can be enhanced.

It is a typical perspective view which shows the outline | summary of a seatbelt apparatus. It is a typical perspective view which shows the structure of a seatbelt retractor. It is a typical perspective view which shows the attachment state to the side plate outer surface of a cover. It is sectional drawing which shows the fixed state of a washer. 6 is a schematic perspective view showing an internal structure of a seat belt retractor according to Embodiment 2. FIG. FIG. 6 is a schematic perspective view showing an appearance of a seat belt retractor according to a second embodiment. It is sectional drawing which shows the fixed state of a washer. It is a test result table | surface which shows the change of the noise of each sample accompanying the change of a frequency. It is a typical perspective view which shows the attachment state to the side plate outer surface of a cover. It is sectional drawing which shows the adhering state of a circular plate. FIG. 6 is a schematic perspective view showing an appearance of a seat belt retractor according to a fourth embodiment. It is sectional drawing which shows the adhering state of a plate. FIG. 10 is a schematic perspective view showing the appearance of a seat belt retractor according to a fifth embodiment. It is a bottom view which shows the bottom view of a cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat belt retractor 12, 14 Side plate 10 Frame 18 Spool 20 Seat belt 22, 52 Cover 24 Lock mechanism 30 Flywheel 36 Lock starting device 53 Rib 55 Adhesive member, Double-sided tape 56 Metal member, washer, plate, cylinder 57 Outer wall 58 Inner wall 300 Steering disc

Embodiment 1
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view showing an outline of a seat belt device. The seat belt device 61 is provided inside the vehicle, and the seat belt 20 for restraining the occupant to the seat 60, the seat belt retractor 1 that winds up one side of the seat belt 20 so that the seat belt 20 can be pulled out, and the seat belt. 20 includes a tongue 64 slidably provided at 20 and a buckle device 65 engaged with the tongue 64.

  The seat belt 20 is wound on one side by the seat belt retractor 1 provided in the lower part in the center pillar 68 and passed through the shoulder anchor 62 on the way, and the other side end is rotated at the lower part of the vehicle body by the stopper 67. Connected as possible.

  In the following, a specific configuration of the seat belt retractor 1 will be described. In order to simplify the description, a mechanism related to the pretensioner and a seat belt 20 with a certain amount of feeding resistance immediately after the seat belt 20 is locked are applied. However, description of an energy absorption mechanism (EA (Energy Absorption) mechanism) or the like that retains the predetermined tension load of the seat belt 20 and feeds the seat belt 20 by a predetermined length in that state is omitted. FIG. 2 is a schematic perspective view showing the configuration of the seat belt retractor 1. In the figure, reference numeral 10 denotes a frame. In the present embodiment, the frame has a substantially U shape in plan view. The frame 10 has a pair of rectangular side plates 12 and 14 facing each other, and a rectangular connecting portion 16 that connects the side plate 12 and the side plate 14.

  Support holes (not shown) are provided at symmetrical positions of the side plate 12 and the side plate 14, respectively. Both ends of the spool 18 are installed between the side plate 12 and the side plate 14 so as to be supported by the support holes. The spool 18 around which the seat belt 20 is wound has a cylindrical shape and winds and unwinds the seat belt. A string-wound coil spring (not shown) is disposed on the outer surface of the side plate 12 to apply a rotational force in the direction of winding the seat belt 20 to the spool 18. Hereinafter, in the frame 10 constituted by the side plate 12, the side plate 14, and the connecting portion 16, a surface facing the spool 18 accommodated therein is referred to as an inner surface, and a surface opposite to this is referred to as an outer surface.

  A cover 22 that covers the coiled coil spring is attached to the outer surface of the side plate 12. On the other hand, a lock mechanism 24 for restricting the rotation of the spool 18 is attached to the outer surface of the side plate 14. The lock mechanism 24 includes a ratchet wheel 26 fixed to the spool 18, a lock ring 28 fitted to the spool 18, a flywheel 30, a lever 32 for forcibly locking the ratchet wheel 26, and a fly A lock actuating device 36 having an operating piece 34 engaged with the wheel 30 is included.

  The lock activation device 36 serving as a sensor for detecting acceleration includes a case 38 fixed to the side plate 14, an actuator 40 loosely fitted inside the case 38, and an operating piece in which the protrusion 34 a is in contact with the upper surface of the actuator 40. 34, and a support portion 42 that pivotally supports the operating piece 34. An arm 44 is provided integrally with the lock ring 28, and a long hole 46 is provided in the arm 44. The lower end side of the lever 32 is pivotally attached to the side plate 14 by a pivot pin 48, and the upper end side is tiltable. A pin 50 is fixed to the lever 32, and the pin 50 is engaged with the long hole 46.

  A friction locking member (not shown) is provided inside the flywheel 30, and components such as a hook (not shown) and a hook retainer (not shown) are incorporated in the lock ring 28. A cover 52 serving as a resin-made housing member that houses the lock mechanism 24 has a lid shape with one open surface, and is placed on the lock mechanism 24 so that the open end surface 52 a abuts the outer surface of the side plate 14. 52 b is a hook portion for holding the cover 52 so that it can be attached to and detached from the outer surface of the side plate 14, and the hook portion 52 b is fitted into a circular opening 54 provided in the side plate 14. Hereinafter, when the cover 52 is attached to the side plate 14, the surface that accommodates the lock mechanism 24 is referred to as an inner wall, and the other surface that is exposed to the outside is referred to as an outer wall. The fixing of the cover 52 to the outer surface of the side plate 14 is not limited to this, and it may be fixed by an appropriate locking means such as a screw.

  In the seat belt retractor 1 configured as described above, when the seat belt 20 is pulled out by an occupant, the flywheel 30 and the operating piece 34 are in a disengaged state, so the spool 18 freely rotates and the seat belt 20 is unwound. When the force for pulling out the seat belt 20 is released, the spool 18 is biased in the winding direction by the coiled coil spring in the cover 22, and the seat belt 20 is wound around the spool 18.

  When the vehicle receives a large acceleration change due to a collision or the like, the lock activation device 36 is activated to prevent the seat belt 20 from being unwound. That is, when a large acceleration is applied to the lock activation device 36, the actuator 40 tilts. As a result, the operating piece 34 is pushed up via the protrusion 34a, and the tip of the operating piece 34 is lifted. The tip of the operating piece 34 engages with the claw portion on the outer peripheral surface of the flywheel 30. As the flywheel 30 stops rotating, the lock ring 28 rotates counterclockwise in a right side view by a mechanism (not shown).

  Next, the arm 44 shifts the upper end side of the lever 32 to the right in FIG. In this case, the tip of the lever 32 is engaged with the ratchet wheel 26, and the spool 18 is firmly locked.

  FIG. 3 is a schematic perspective view showing a state in which the cover 52 is attached to the outer surface of the side plate 14. An annular rib 53 for securing the strength of the cover 52 protrudes from the bottom outer wall 57 of the lid-like cover 52 formed of resin. The center of the annular rib 53 exists in the vicinity of the center axis extension line indicated by a one-dot chain line extending in the longitudinal direction of the spool 18. The metal member 56 is fixed to the bottom outer wall 57 of the cover 52 by an adhesive member 55.

  The metal member 56 is a member made of metal such as stainless steel or aluminum, and the shape thereof may be a rectangular plate shape, a disc shape, a columnar shape, a triangular pyramid shape, an annular plate shape, or the like. In the present embodiment, the metal member 56 is assumed to be an annular plate-shaped member made of stainless steel, and the metal member 56 is replaced with a washer 56. The adhesive member 55 only needs to be able to fix the washer 56 on the bottom outer wall 57 of the cover 52. For example, a double-sided tape having a rectangular plate shape, a disk shape, or a washer shape is used. In the following description, it is assumed that the adhesive member 55 is a double-sided tape 55 having an annular plate shape similar to the washer 56 and having a thickness smaller than that of the washer 56.

  The outer diameters of the double-sided tape 55 and the washer 56 are set to be approximately the same as the inner diameter of the rib 53 in order to attach them to the annular rib 53. The center of the washer 56 and the double-sided tape 55 is also in the vicinity of the center axis extension line indicated by the alternate long and short dash line extending in the longitudinal direction of the spool 18, similarly to the center of the annular rib 53. As a result, the centers of the ratchet wheel 26, flywheel 30, rib 53, double-sided tape 55, and washer 56 exist in the vicinity of the center axis extension line of the spool 18.

  FIG. 4 is a cross-sectional view showing a fixed state of the washer 56. One surface of the annular double-sided tape 55 having substantially the same diameter is attached to a region surrounded by the protruding ribs 53 on the bottom outer wall 57 of the cover 52. On the other surface of the double-sided tape 55, an annular washer 56 having substantially the same diameter is attached to a region surrounded by a protruding rib 53 on the bottom outer wall 57 of the cover 52 with the double-sided tape 55 interposed. Thereby, even when the vibration of the component including the spool 18, the lock mechanism 24, the lock activation device 36, or other sensors (not shown) is transmitted to the cover 52, the vibration is attenuated by the washer 56. In addition, an annular rib 53 whose center substantially coincides with the center axis of the spool 18 is provided in advance, and when the washer 56 is attached, the double-sided tape 55 and the washer 56 may be attached using the region surrounded by the rib 53 as a mark. It is possible to improve production efficiency and attenuation characteristics.

Embodiment 2
The second embodiment relates to a form in which the cover 52 functions as a bearing for the spool 18. FIG. 5 is a schematic perspective view showing the internal structure of the seat belt retractor 1 according to the second embodiment. The seat belt retractor 1 according to the second embodiment includes the side plates 12 and 14, the frame 10, the cover 22, the seat belt 20, the lock starting device 36, the lock mechanism 24, the steering disk 300, the spool 18, the rib 53, the cover 52, and the like. Consists of including. The cover 52 according to Embodiment 2 has a lid shape with a circular bottom surface, and an annular bearing hole 180 is provided at a substantially central portion of the circular bottom surface. The center of the bearing hole 180 is provided at the substantially central portion of the cover 52 so as to coincide with the center axis of the spool 18. The bearing hole 180 supports the tip shaft so that the spool 18 can rotate.

  The spool 18 passes through the side plate 14, the center of the steering disk 300, and the bearing hole 180 of the cover 52 in this order, and a part of the tip protrudes from the cover 52. From 9 o'clock to 12 o'clock in the right side view of the steering disk 300, a lock activation device 36 and a lock mechanism 24, which are sensors for detecting acceleration or impact, are provided. When the lock activation device 36 detects a predetermined acceleration or impact, the lock mechanism 24 operates and stops the rotation of the steering disk 300. The spool 18 is fitted to the steering disk 300, and the rotation of the spool 18 is stopped when the steering disk 300 is stopped.

  FIG. 6 is a schematic perspective view showing an appearance of the seat belt retractor 1 according to the second embodiment. FIG. 7 is a cross-sectional view showing a fixed state of the washer 56. As shown in FIG. 7, a concave portion having a circular shape in plan view is provided in the vicinity of the center of the bottom outer wall 57 of the cover 52, and a circular bearing hole 180 is formed at the center of the bottom surface of the concave portion. The tip of the spool 18 is rotatably inserted into the bearing hole 180. The cover 52 projects one end of the spool 18 from a bearing hole 180 formed in the center, covers the lock activation device 36, the lock mechanism 24, and the steering disk 300, and a plurality of screws or the like on the outer surface of the side plate 14. It is attached by locking means. An annular rib 53 protrudes from the outer wall 57 of the cover 52 so as to be concentric with the bearing hole 180 of the cover 52. The annular double-sided tape 55 has adhesive surfaces on both sides, the outer diameter is substantially the same as the inner diameter of the rib 53, and a hole substantially the same as the outer diameter of the bearing hole 180 is provided in the center.

  As with the double-sided tape 55, the washer 56 has an outer diameter that is substantially the same as the inner diameter of the rib 53, and a hole that is substantially the same as the outer diameter of the bearing hole 180 is provided at the center thereof. The double-sided tape 55 is stuck on the outer wall 57 of the cover 52 surrounded by the ribs 53. Thereafter, the washer 56 is also attached to the outer wall 57 of the cover 52 surrounded by the ribs 53 via the double-sided tape 55. After the washer 56 is attached, the center of the spool 18, the center of the steering disk 300, the center of the rib 53, the center of the cover 52, the center of the double-sided tape 55, and the center of the washer 56 are substantially aligned. The accompanying vibration of each component is damped by the appropriately attached washer 56. The internal structure of the seat belt retractor 1 is not limited to that described in the present embodiment, and uses a spool or the like that performs the winding and unwinding operations of the seat belt by driving an electric motor. The form is not limited.

  Then, the effect test by having fixed the washer 56 was implemented. Samples 1 to 4 were prepared. Sample 1 is one in which the washer 56 is not attached to the seat belt retractor 1 according to the second embodiment, and Samples 2 to 4 have thicknesses of the seat belt retractor 1 according to the second embodiment via the double-sided tape 55, respectively. A different washer 56 is attached. The washer 56 is made of stainless steel. The washers 56 of Sample 2 to Sample 4 have an outer diameter of 26 mm, the thickness of Sample 2 is 2.3 mm, the thickness of Sample 3 is 3.2 mm, and the thickness of Sample 4 is 4.5 mm.

As excitation conditions, the frequency was 10 to 40 Hz, the acceleration was 4.9 m / s ² , and the vibration direction was the front-rear direction along the axial direction of the spool 18. Further, the seat belt 20 was fixed at a winding amount of 1500 mm and 200 mm ahead of the seat belt retractor 1. The background noise was 50 dB (A) or less.

  FIG. 8 is a list of test results showing changes in noise of each sample accompanying changes in frequency. Noise was measured by changing the frequency between 10 Hz and 40 Hz every 5 Hz. In the sample 1 where the washer 56 was not attached, noise exceeding 50 dB was measured in all frequency bands. In sample 2, the noise was partially 50 dB or less in a specific frequency band. Furthermore, in sample 3 and sample 4, noise was 50 dB or less in almost all frequency bands. When sample 3 and sample 4 are compared, sample 3 has lower noise in many frequency bands, and sample 3 has the most preferable result. Considering the increase in weight and noise comprehensively, the thickness of the washer is preferably about 2.3 mm to 4.5 mm.

  The second embodiment is configured as described above, and the other configurations and operations are the same as those of the first embodiment. Therefore, corresponding parts are denoted by the same reference numerals, and detailed description thereof is omitted.

Embodiment 3
The third embodiment relates to a form in which a circular plate 56 is attached as the metal member 56. FIG. 9 is a schematic perspective view showing a state where the cover 52 is attached to the outer surface of the side plate 14, and FIG. 10 is a cross-sectional view showing a state where the circular plate 56 is fixed. Unlike the first and second embodiments, a circular plate 56 made of stainless steel is attached to the outer wall 57 of the cover 52 with a circular double-sided tape 55. The center of the rib 53, the center of the double-sided tape 55, and the center of the circular plate 56 substantially coincide with the longitudinal extension line of the central axis of the spool 18 indicated by a one-dot chain line.

  FIG. 10A is a cross-sectional view showing a state in which the circular plate 56 is attached to the outer wall 57 of the cover 52. An annular rib 53 projects from the bottom surface of the cover 52 having a lid shape in a direction opposite to the direction in which the cover 52 is attached to the side plate 14. The inner diameter of the rib 53 and the outer diameter of the double-sided tape 55 and the circular plate 56 substantially coincide with each other. A double-sided tape 55 is attached on the outer wall 57 of the cover 52 surrounded by the ribs 53, and then a circular plate 56 is attached.

  FIG. 10B is a cross-sectional view showing a state in which the circular plate 56 is attached to the inner wall 58 of the cover 52. As shown in FIG. 10B, the ribs 53 may be protruded from the inner wall 58 of the cover 52, and the circular double-sided tape 55 and the circular plate 56 may be attached to the inner wall of the cover 52. An annular rib 53 projects from the bottom surface of the cover 52 having a lid shape in the same direction as the direction in which the cover 52 is attached to the side plate 14. The inner diameter of the rib 53 and the outer diameter of the double-sided tape 55 and the circular plate 56 substantially coincide with each other. On the inner wall 58 of the cover 52 surrounded by the ribs 53, the double-sided tape 55 is first attached, and then the circular plate 56 is attached. Also in the case of mounting on the inner wall 58 side, the center of the rib 53, the center of the double-sided tape 55, and the center of the circular plate 56 substantially coincide with the longitudinal extension of the center axis of the spool 18 indicated by a one-dot chain line.

  The third embodiment is configured as described above, and other configurations and operations are the same as those of the first embodiment. Therefore, the corresponding parts are denoted by the same reference numerals, and detailed description thereof is omitted.

Embodiment 4
The fourth embodiment relates to a form using a half-punched plate. FIG. 11 is a schematic perspective view showing an appearance of the seat belt retractor 1 according to the fourth embodiment, and FIG. 12 is a cross-sectional view showing a state where the plate 56 is fixed. Instead of the washer 56, the metal member 56 according to the fourth embodiment uses a plate-like plate 56 having a recess with a predetermined depth in the center. The stainless steel plate 56 has a recess with a predetermined depth formed by half punching in a direction opposite to the mounting direction of the cover 52 so as to avoid contact with the tip of the spool 18.

  The double-sided tape 55 has an annular shape as in the second embodiment, and is stuck on the outer wall 57 surrounded by the ribs 53 of the cover 52. The flange portion of the plate 56 having substantially the same outer diameter as the inner diameter of the rib 53 is adhered to the double-sided tape 55. Thus, the plate 56 is attached to the outer wall 57 surrounded by the rib 53 of the cover 52 via the double-sided tape 55 so as to cover the tip portion of the spool 18.

  The fourth embodiment is configured as described above, and the other configurations and operations are the same as those of the second embodiment. Therefore, corresponding parts are denoted by the same reference numerals, and detailed description thereof is omitted.

Embodiment 5
The fifth embodiment relates to a form in which a cylindrical metal member 56 is attached to the side surface of the outer wall 57 of the cover 52. FIG. 13 is a schematic perspective view showing the appearance of the seatbelt retractor 1 according to the fifth embodiment, and FIG. 14 is a bottom view showing the cover 52 as viewed from the bottom. The metal member 56 has an inner diameter slightly larger than the outer diameter of the cover 52, has a cylindrical shape with a thickness of several millimeters, and is made of stainless steel or the like. In the following description, the metal member 56 is replaced with the cylindrical body 56.

  The cylindrical body 56 is attached to the side surface of the outer wall 57 of the cover 52 having a circular lid shape on the bottom surface via an adhesive member 55. The adhesive member 55 may be an adhesive or the like in addition to the double-sided tape. The adhesive member 55 is attached so as to cover the side surface of the outer wall 57 of the cover 52. The cylindrical body 56 is pasted so as to cover the side surface of the outer wall 57 of the cover 52 via the adhesive member 55. The cylindrical body 56 may be affixed via an adhesive member 55 by attaching a belt-shaped metal plate around the side surface of the outer wall 57 of the cover 52 in addition to affixed in advance to a ring shape.

  As shown in FIG. 14, the cylindrical body 56 is affixed on a concentric circle with the spool, the rib 53 and the cover 52. In the present embodiment, the cylindrical body 56 is attached to the side surface of the outer wall 57 of the cover 52, but the cylindrical body 56 may be attached to the side surface of the inner wall 58 of the cover 52. In this case, the outer diameter of the cylindrical body 56 is configured to be slightly smaller than the inner diameter of the cover 52 having a lid shape having a circular bottom surface. An adhesive member 55 is attached to the side surface of the inner wall 58 of the cover 52. The outer peripheral surface of the cylindrical body 56 is attached to the side surface of the inner wall 58 of the cover 52 via the adhesive member 55. In addition to the cylindrical body 56 described in this embodiment, the metal member 56 described in Embodiments 1 to 4 may be further attached. That is, the annular double-sided tape 55 described in the first to fourth embodiments, the washer 56, the circular plate 56 or the like on the outer wall 57 or the inner wall 58 of the cover 52 to which the cylindrical body 56 is attached in the configuration of FIG. The punched plate 56 may be further pasted. By doing so, the noise prevention effect is further improved.

  The fifth embodiment is configured as described above, and other configurations and operations are the same as those of the second embodiment. Therefore, corresponding parts are denoted by the same reference numerals, and detailed description thereof is omitted.

Claims (4)

In the seat belt retractor installed in the vehicle,
A pair of side plates disposed opposite to each other;
A spool constructed between the side plates and wound around a seat belt;
A locking mechanism attached to the outer surface of the side plate and restraining rotation of the spool;
A resin containing member attached to the outer surface of the side plate and containing the lock mechanism;
A metal member fixed to the outer wall or the inner wall of the housing member ,
The metal member is a metal plate or a cylindrical member, and the metal member is attached to an outer wall or an inner wall of the housing member via an adhesive member,
An annular rib projects from the outer wall or inner wall of the housing member,
The metal member is an annular plate having an outer diameter substantially the same as the inner diameter of the annular rib, and is attached to the outer wall or inner wall of the housing member surrounded by the annular rib via the adhesive member. Seat belt retractor characterized by. The seat belt retractor according to claim 1, wherein the adhesive member is a double-sided tape . The seat belt retractor according to claim 1 , wherein the metal plate is half-punched and attached to the outer wall of the housing member. The seatbelt retractor according to any one of claims 1 to 3 , wherein the resin housing member supports the spool.

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