JP5812590B2 - Buckle and seat belt device - Google Patents

Description

  The present invention relates to a buckle and a seat belt device mounted on a vehicle seat such as an automobile, and more particularly to a buckle having a feature in assembling a buckle cover and a seat belt device having the buckle.

  2. Description of the Related Art A vehicle such as an automobile is generally provided with a three-point seat belt device that restrains an occupant on a seat that includes a seat portion on which the occupant sits and a backrest portion that is positioned on the back of the occupant. Such a seat belt device includes a webbing that restrains an occupant, a seat belt retractor that winds the webbing, a guide anchor that is provided on the vehicle body side and guides the webbing, and a belt anchor that fixes the webbing to the vehicle body side. And a buckle disposed on the side surface of the seat and a tongue disposed on the webbing, and the passenger is restrained by the webbing by fitting the tongue to the buckle.

  The buckle supports, for example, a tongue insertion port for inserting a tongue, a latch member that engages with the inserted tongue, an operation button that releases the engagement of the latch member, and the latch member and the operation button. A base member, an upper cover in which the tongue insertion opening is formed and the base member is mounted; and a lower cover connected to the upper cover and covering the base member (for example, Patent Document 1 and Patent Document 2) reference).

  In the buckle described in Patent Literature 1, an inclined portion that engages with a lower cover (base cover) is formed on a base member (substrate portion). Therefore, in the buckle described in Patent Document 1, when assembling the buckle, the base member is pushed into the recessed portion of the lower cover while the inclined portion is engaged with the lower cover, and the upper cover (lid cover) is placed on the lower cover. The claw portion of the upper cover is covered with the locking portion of the lower cover.

  In addition, the buckle described in Patent Document 2 connects the lower cover (lower cover) and the upper cover (upper cover) with screws in a state where the base member (frame) is mounted on the upper cover (upper cover). .

JP-A-2005-290 International Publication No. 2007/032168

  In the buckle described in Patent Document 1 described above, the base member is supported by the lower cover and the upper cover is connected to the lower cover, but the base member is only inserted and attached to the upper cover, and is locked. Even if it has a part to do, it was a loose locking part.

  Further, in the buckle described in Patent Document 2 described above, the upper cover and the lower cover are firmly connected by screws, but the base member is only inserted and attached to the upper cover and is locked. Even if it had a part, it was a loose locking part.

  Further, the upper cover and the lower cover are molded from a resin, and the base member is formed from a metal, which is a component having a different coefficient of thermal expansion.

  Therefore, play may occur between the base member, the lower cover, and the upper cover due to errors in the manufacturing process and assembly process, temperature changes in the usage environment, etc., causing vibration and abnormal noise, which may cause discomfort to the passengers. There was a problem.

  In addition, when connecting the base member, the lower cover and the upper cover with screws, the manufacturing tolerance of the screw holes becomes strict and the man-hours of the manufacturing process increase or the process of tightening the screws is required. There was also a problem that it would increase.

  The present invention has been devised in view of such a problem, and it is difficult for rattling to occur between the structural parts of the buckle, it is possible to suppress the occurrence of vibration and abnormal noise, and to reduce discomfort given to the occupant. An object of the present invention is to provide a buckle and a seat belt device.

According to the present invention, a buckle that is detachably engaged with a tongue of a seat belt device that restrains an occupant to a seat, the tongue insertion port through which the tongue is inserted, and a latch member that engages with the inserted tongue. An operation button for releasing the engagement of the latch member, a base member for supporting the latch member and the operation button, an upper cover in which the tongue insertion port is formed and the base member is mounted, A lower cover that is connected to the upper cover and covers the base member; and an opening that is formed on the opposite side of the tongue insertion port and passes through a fixing member that is fixed to the base member. An edge portion that forms a part of the opening and covers an upper portion of the base member; a locking hole formed in a bottom portion of the base member; and the lower cover A convex portion which is formed is inserted into the locking holes, and a pair of lightening hole formed in the corner portion over the bottom portion from the side surface of the base member, is formed on the lower surface portion of the lower cover in the lightening hole A pair of guide ribs to be inserted, and by placing the base member on the lower surface portion of the lower cover, the convex portions are inserted into the locking holes and the guide ribs are formed in the cutout holes. A buckle is provided that is configured to be inserted .

According to the present invention, the webbing for restraining the occupant to the seat, the seat belt retractor for winding the webbing, the guide anchor provided on the vehicle body side for guiding the webbing, and the webbing fixed to the vehicle body side. A seat belt device that includes a belt anchor, a buckle disposed on a side surface of the seat, and a tongue disposed on the webbing, and restrains an occupant with the webbing by fitting the tongue to the buckle. The buckle includes a tongue insertion port into which the tongue is inserted, a latch member that engages with the inserted tongue, an operation button that releases the engagement of the latch member, the latch member, and the operation A base member that supports a button, and an upper in which the tongue member is formed and the base member is mounted A lower cover that is connected to the upper cover and covers the base member; and an opening that is formed on the opposite side of the tongue insertion port and passes through a fixing member that is fixed to the base member. Formed at a part of the opening and covering the upper portion of the base member, a locking hole formed at the bottom of the base member, and formed in the lower cover and inserted through the locking hole. Yes and the convex portion that includes a pair of lightening hole formed in the corner portion over the bottom portion from the side surface of the base member, and a pair of guide ribs which are formed on the lower surface portion of the lower cover is inserted through the lightening hole, the Then, by placing the base member on the lower surface portion of the lower cover, the convex portion is inserted into the locking hole and the guide rib is inserted into the meat hole. Is configured, the seat belt apparatus is provided, characterized in that.

  In the buckle and seat belt device of the present invention described above, the upper cover may have a reinforcing rib formed on an inner surface substantially perpendicular to the edge.

The reinforcing rib may include a pair of main reinforcing ribs , and a sub reinforcing rib formed substantially parallel to the edge portion may be formed between the main reinforcing ribs. Furthermore, you may have a notch part which can avoid interference with the drive member of the said latch member or the said operation button. The reinforcing rib may be formed thinner than the edge.

  Moreover, the lower end of the said edge part is arrange | positioned in the position which can cover 50% or more of the height of the said base member, for example.

  Moreover, the said convex part may be formed more thickly than the back surface rib formed in the inner surface of the said lower cover at least partially.

  According to the buckle and the seat belt device according to the present invention described above, the end portion of the base member can be sufficiently held by the upper cover by configuring the predetermined edge portion, and the lower cover and the base member are formed as the convex portion. The holding force of the base member of the lower cover can be improved by locking with the locking holes, and the mutual holding force between the base member, the lower cover, and the upper cover can be improved. Therefore, backlash is unlikely to occur between the structural parts of the buckle, generation of vibrations and abnormal noise can be suppressed, and uncomfortable feeling given to the occupant can be reduced.

  Moreover, the strength of the edge can be improved by forming the reinforcing rib on the edge.

  Moreover, the strength of the edge can be effectively improved by configuring the reinforcing rib with the main reinforcing rib and the auxiliary reinforcing rib.

  In addition, by forming a notch in the sub-reinforcement rib, interference between the buckle drive part and the sub-reinforcement rib can be avoided, and the strength of the edge can be maintained without changing the shape (size) of the upper cover. Can be improved.

  Further, by forming a thin reinforcing rib on the edge, it is possible to suppress the resin sink on the surface of the edge during molding, and it is possible to form a clean design surface.

  Moreover, the edge part of a base member can be hold | maintained effectively by arrange | positioning the lower end of an edge part in the position which can cover 50% or more of the height of a base member.

  Moreover, by forming the convex portion thicker than the other back ribs, the strength of the convex portion can be improved and the holding force of the base member can be improved.

It is a component expanded view of the buckle which concerns on embodiment of this invention. It is a figure which shows the base member shown in FIG. 1, (A) is a perspective view, (B) is a top view, (C) is a side view. It is a figure which shows the upper cover shown in FIG. 1, (A) is a perspective view, (B) is a top view, (C) is a side view, (D) is a D arrow line view in FIG. E) is a view on arrow E in FIG. It is a figure which shows the lower cover shown in FIG. 1, (A) is a perspective view, (B) is a top view, (C) is C arrow directional view in FIG. 4 (B). It is sectional drawing which shows the connection state of a base member, an upper cover, and a lower cover. 1 is an overall configuration diagram of a seat belt device according to an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Here, FIG. 1 is an exploded view of parts of the buckle according to the embodiment of the present invention. 2A and 2B are views showing the base member shown in FIG. 1, wherein FIG. 2A is a perspective view, FIG. 2B is a plan view, and FIG. 2C is a side view. 3 is a view showing the upper cover shown in FIG. 1, in which (A) is a perspective view, (B) is a plan view, (C) is a side view, and (D) is an arrow D in FIG. 3 (B). FIG. 4E is a view taken along arrow E in FIG. 4A and 4B are diagrams illustrating the lower cover illustrated in FIG. 1, in which FIG. 4A is a perspective view, FIG. 4B is a plan view, and FIG. 4C is a view taken along the arrow C in FIG.

  The buckle 1 which concerns on embodiment of this invention is the buckle 1 which engages with the tongue of the seatbelt apparatus which restrains a passenger | crew to a seat so that attachment or detachment is possible, as shown in FIGS. 1-4, Comprising: The tongue which inserts a tongue The insertion port 2, the latch member 3 that engages with the inserted tongue, the operation button 4 that releases the engagement of the latch member 3, the base member 5 that supports the latch member 3 and the operation button 4, and the tongue insertion port 2 and the upper cover 6 on which the base member 5 is mounted, the lower cover 7 connected to the upper cover 6 and covering the base member 5, and formed on the opposite side of the tongue insertion port 2 and fixed to the base member 5. An opening portion 8 through which the fixing member 10 is inserted, an edge portion 61 formed on the upper cover 6 to form a part of the opening portion 8 and covering the upper portion of the base member 5, and the lower cover 7 It has a protrusion 71 formed so as to protrude to the surface, and are formed in the base member 5 projecting portion 71 can be inserted a locking hole 51, a.

  The tongue insertion port 2 is a portion for guiding the insertion of the tongue. Specifically, the tongue insertion port 2 is an opening formed in front of the upper cover 6 as shown in FIG. In addition, a tapered portion 21 is formed on the outer periphery of the tongue insertion port 2 for allowing the tip of the tongue to smoothly enter the buckle 1. The opening adjacent to the tongue insertion port 2 is an operation button opening 62 into which the operation button 4 is inserted.

  The latch member 3 is a part that engages the inserted tongue and restrains the tongue. Specifically, as shown in FIG. 1, the latch member 3 rotates in a direction substantially perpendicular to the pair of flange portions 31 that are rotatably supported by the base member 5 and the tongue entry direction. And a claw portion 32 engaged with the opening of the tongue. The latch member 3 includes a slider 33 slidably disposed on the upper surface portion of the latch member 3 and a slider spring 34 that urges the slider 33 from the flange portion 31 side toward the claw portion 32 side. . The slider 33 has a pair of arm portions 33 a extending in the lateral direction of the buckle 1, and the arm portions 33 a are configured to be able to be locked to the operation buttons 4.

  The operation button 4 is a part that allows the tongue to be pulled out from the buckle 1 by releasing the engagement of the latch member 3. Specifically, as illustrated in FIG. 1, the operation button 4 is configured to be slidable along the longitudinal direction of the base member 5, and is provided with an operation unit 41 disposed on the front surface and pressed by the occupant, and an operation unit An inner guide portion 42 extending from 41 to be disposed inside the base member 5, and an outer guide portion 43 extending from the operation portion 41 to be disposed outside the base member 5. .

  The base member 5 is a component serving as a substrate that supports driving components such as the latch member 3 and the operation buttons 4. In addition to the latch member 3 and the operation button 4, the buckle 1 is a lock that restrains the movement of the latch member 3 supported by the base member 5 and engaged with the tongue in the disengagement direction, as shown in FIG. A pin 52, an ejector 53 that is slidable in the longitudinal direction of the base member 5, can be urged in a direction to detach the tongue from the buckle 1, an ejector spring 54 that urges the ejector 53, and a base member 5. And a lever member 55 that is movably supported and restrains the movement of the slider 33 when the tongue and the latch member 3 are engaged.

  When the tongue is inserted into the tongue insertion port 2, the ejector 53 is pushed in by the tongue, the ejector 53 comes into contact with the flange portion 31, and the latch member 3 is rotated in a direction to engage the tongue. As the latch member 3 rotates, the slider 33 also rotates, and the slider 33 restrained by the side surface of the lock pin 52 slides under the lock pin 52 by the biasing force of the slider spring 34. By this operation, the latch member 3 is engaged with the tongue, and the tongue can be restrained by the buckle 1.

  On the other hand, when releasing the tongue, the slider 33 is pushed by pushing the operation button 4, and the slider 33 is pushed from the lower side of the lock pin 52 to the side surface by the urging force of the slider spring 34. Accordingly, the latch member 3 rotates in the disengagement direction, and the tongue is released from the latch member 3. Then, the tongue is released to the outside of the buckle 1 through the ejector 53 by the urging force of the ejector spring 54.

  Further, as shown in FIG. 2A, the base member 5 has a flat bottom portion 5a and a pair of side surface portions 5b provided upright on both sides of the bottom portion 5a.

  2B, the ejector passage 5c that holds the ejector 53 slidably, the ejector spring holding portion 5d that supports the ejector spring 54, and a part of the fixing member 10 are inserted into the bottom 5a. A possible fixing opening 5e and a locking hole 51 through which the convex portion 71 formed in the lower cover 7 can be inserted are formed. The locking hole 51 may be a through hole or a recess formed in the bottom 5a.

  As shown in FIG. 2C, the side surface portion 5b includes a latch member support portion 5f that rotatably supports the flange portion 31 of the latch member 3, a slider passage 5g that allows the slider 33 to move, The lock pin support portion 5h for supporting the lock pin 52, the operation button guide holes 5i and 5j for guiding the convex portions and the claw portions formed in the outer guide portion 43 of the operation button 4, and the lever member 55 are rotatable. And a lever member support portion 5k to be supported. In addition, since the base member 5 is generally a metal part, the lightening holes 5m and 5n are appropriately formed to reduce the weight.

  The upper cover 6 is a part that houses the base member 5 on which the latch member 3 and the operation buttons 4 are arranged. Specifically, as shown in FIG. 3A, the upper cover 6 includes an upper surface portion 6a that forms the upper surface of the buckle 1, and a pair of side surface portions 6b that are erected on both sides of the upper surface portion 6a. Have. As shown in FIGS. 3A to 3C, a bridge portion 6 c that spans between the side surface portions 6 b and forms the tongue insertion port 2 is formed in front of the upper cover 6. As shown in FIG. 3C, a recess 6d is formed behind the bridge portion 6c, and the lower cover 7 is connected to the recess 6d. As shown in FIG. 3D, a tapered portion 21 is formed on the outer periphery of the tongue insertion port 2 on the front surface of the bridge portion 6c. Further, the operation portion 41 of the operation button 4 is inserted into the operation button opening 62 which is adjacent so as to communicate with the tongue insertion port 2.

  As shown in FIG. 3C, the upper surface portion 6a has an inclined surface that is gently inclined at the rear side opposite to the front side (on the tongue insertion port 2 side), and an edge portion 61 is erected at the end portion thereof. Has been. As shown in FIG. 6E, the edge 61 has a recess 8 a that constitutes a part of the opening 8.

  As shown in FIGS. 3A and 3B, the upper cover 6 has reinforcing ribs 63 formed on the inner surface substantially perpendicular to the edge portion 61. By forming the reinforcing rib 63, the strength of the edge portion 61 can be improved. The reinforcing rib 63 includes a pair of main reinforcing ribs 63a and a plurality of sub reinforcing ribs 63b formed between the main reinforcing ribs 63a and substantially parallel to the edge 61. With this configuration, the strength of the edge 61 can be easily improved. Further, the main reinforcing rib 63 a connected to the edge portion 61 is formed thinner than the edge portion 61. By forming the thin main reinforcing rib 63a on the edge portion 61, resin sink on the edge surface during molding can be suppressed, and a clean design surface can be formed. Further, the auxiliary reinforcing rib 63b has a notch 63c that can avoid interference with the driving member (for example, the slider 33) of the latch member 3 or the operation button 4. By forming the notch 63c, interference between the driving component of the buckle 1 and the auxiliary reinforcing rib 63b can be avoided, and the strength of the edge 61 can be changed without changing the shape (size) of the upper cover 6. Can be improved.

  The lower cover 7 is a lid member that covers the base member 5 attached to the upper cover 6. Specifically, as shown in FIG. 4A, the lower cover 7 includes a lower surface portion 7a that forms the lower surface of the buckle 1, and a pair of side surface portions 7b that are erected on both sides of the lower surface portion 7a. Have Further, as shown in FIG. 4C, the lower cover 7 has an edge portion 7c connected to the lower surface portion 7a and the side surface portion 7b behind the lower cover 7, and the edge portion 7c includes a part of the opening portion 8. The recessed part 8b which comprises is formed. Also, as shown in FIGS. 4A and 4C, a pair of lower surface portions 7 a are engaged with recesses formed in the inner surface of the side surface portion 6 b of the upper cover 6 when connected to the upper cover 6. A claw portion 7d is erected. The base member 5 is disposed in the gap between the pair of claw portions 7d, and the pair of claw portions 7d also has a function as a guide member for guiding the base member 5.

  Also, as shown in FIGS. 4B and 4C, rectangular guide ribs 7e that can be locked in the hollow holes 5n of the base member 5 are arranged at the bases of the claw portions 7d that face each other. Since the guide rib 7e is also a component that restrains the movement of the base member 5 in the longitudinal direction of the buckle 1, the guide rib 7e is formed thicker than the other back ribs 7f formed on the inner surface of the lower cover 7.

  In addition, a convex portion 71 is provided upright at an intermediate portion between the pair of guide ribs 7e. The convex portion 71 is inserted through the locking hole 51 of the base member 5. Similarly to the guide rib 7 e, the convex portion 71 is a part that restrains the movement of the buckle 1 in the longitudinal direction of the base member 5, so that it is at least partially thicker than the other back rib 7 f formed on the inner surface of the lower cover 7. Has been. With this configuration, the strength of the convex portion 71 can be easily improved, and the holding force of the base member 5 can be improved. In addition, the thickness of the convex portion 71 may be formed to a uniform thickness that can be locked in the locking hole 51.

  The opening 8 is an opening through which a part (for example, the fixing member 10) led out from the inside of the buckle 1 is inserted. Specifically, when the lower cover 7 is connected to the upper cover 6, the recess 8a of the upper cover 6 and the recess 8b of the lower cover 7 are combined to form one opening 8 (see FIG. 5).

  For example, as shown in FIG. 1, the fixing means 10 includes a bracket 10 a connected to the vehicle body side and a rivet 10 b that fixes the bracket 10 a to the base member 5. The bracket 10a is fixed to a fixing opening 5e (see FIG. 2) formed in the base member 5 via a rivet 10b.

  Further, the buckle 1 may include a buckle switch 9 having a movable contact 91 and a fixed contact 92 as shown in FIG. The movable contact 91 is held by a switch slider 93 that can move in the longitudinal direction of the buckle 1 together with the ejector 53. The fixed contact 92 is fixed to fixed contact holding means 94 disposed on the base member 5. Further, a shield plate 95 that protects the contact portion may be disposed above the fixed contact holding means 94.

  In the buckle switch 9, when the tongue is inserted into the buckle 1, the ejector 53 is pushed backward, and at the same time, the switch slider 93 moves. The movable contact 91 comes into contact with the fixed contact 92 and is energized with the latch member 3 engaged with the tongue. A signal that the tongue is engaged with the buckle 1 by such energization is transmitted to a predetermined electronic control unit (ECU). The wiring (harness) of the buckle switch 9 is led out from the opening 8 to the outside. The buckle switch 9 is not limited to the slide switch described above, and may be a hall switch using a magnetic field.

  Here, FIG. 5 is a cross-sectional view showing a connection state of the base member 5, the upper cover 6 and the lower cover 7. In FIG. 5, other parts such as the latch member 3 and the operation button 4 are not shown.

  As shown in FIG. 5, the edge portion 61 formed on the upper cover 6 is formed with a width A that sufficiently faces the step portion 5 p formed on the side surface portion 5 b of the base member 5. Further, the lower end of the edge portion 61 is disposed at a position that can cover 50% or more of the height H of the base member 5. That is, the lower end of the edge portion 61 is disposed at a position away from the uppermost portion of the base member 5 by a distance Z, and is disposed at a position satisfying the condition of distance Z / height H ≧ 1/2. In addition, in a state where the lower cover 7 is connected to the upper cover 6, the convex portion 71 erected on the lower cover 7 is inserted into a locking hole 51 formed in the base member 5.

  Therefore, according to the buckle 1 according to the embodiment of the present invention, the end portion (stepped portion 5p) of the base member 5 can be sufficiently held by the upper cover 6 by configuring the edge portion 61 having the width A. The holding force of the base member 5 of the lower cover 7 can be improved by locking the lower cover 7 and the base member 5 by the convex portion 71 and the locking hole 51, and the base member 5, the upper cover 6 and the lower cover can be improved. It is possible to improve the mutual holding force between the seven members. As a result, large backlash is unlikely to occur between the structural parts of the buckle 1, generation of vibration and abnormal noise can be suppressed, and discomfort given to the occupant can be reduced.

  Finally, a seat belt device according to an embodiment of the present invention will be described. Here, FIG. 6 is an overall configuration diagram of the seat belt device according to the embodiment of the present invention. In addition, about the same component as the component shown in FIG. 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  The seat belt device according to the embodiment of the present invention shown in FIG. 6 includes a webbing W for restraining an occupant to the seat 11, a seat belt retractor 12 for winding the webbing W, and a webbing W provided on the vehicle body side. A guide anchor 13, a belt anchor 14 for fixing the webbing W to the vehicle body side, a buckle 1 disposed on the side surface of the seat 11, and a tongue 15 disposed on the webbing W. The tongue 15 is a buckle 1 1 is a seat belt device that restrains an occupant with a webbing W, and the buckle 1 has the configuration shown in FIGS.

  The seat 11 includes, for example, a seat 11a on which an occupant sits, a backrest 11b located on the back of the occupant, and a headrest 11c that supports the occupant's head. The seat belt retractor 12 is stored in, for example, the center pillar 16 on the vehicle body side. In general, the buckle 1 is often disposed on the side surface of the seat 11a, and the belt anchor 14 is often disposed on the lower surface of the seat 11a. Further, the guide anchor 13 is often disposed on the center pillar 16 of the vehicle body.

  When the occupant wears the seat belt, the tongue 15 is fitted to the buckle 1. At this time, the webbing W is pulled out from the seat belt retractor 12 and is extended between the belt anchor 14 and the seat belt retractor 12 via the tongue 15 fixed to the guide anchor 13 and the buckle 1 to restrain the occupant. Further, when the seat belt is released as when the passenger gets off (when the tongue 15 is released from the buckle 1), the webbing W is rewound onto the seat belt retractor 12.

  Such a seat belt device employs the buckle 1 according to the embodiment of the present invention described above. Therefore, the end portion of the base member 5 can be sufficiently held by the upper cover 6, the holding force of the base member 5 of the lower cover 7 can be improved, and the space between the base member 5, the upper cover 6 and the lower cover 7 can be improved. Mutual holding power can be improved. As a result, rattling is unlikely to occur between the structural parts of the buckle 1, generation of vibration and abnormal noise can be suppressed, and discomfort given to the occupant can be reduced.

  The present invention is not limited to the above-described embodiments, and is used for various vehicles such as a driver's seat belt device, a passenger seat belt device, a rear seat belt device, a child seat, an aircraft other than a vehicle, a ship, and a playground equipment. Needless to say, various modifications can be made without departing from the spirit of the present invention, such as being applicable to a seat belt apparatus.

DESCRIPTION OF SYMBOLS 1 ... Buckle 2 ... Tongue insertion port 3 ... Latch member 4 ... Operation button 5 ... Base member 5a ... Bottom part 5b ... Side face part 5c ... Ejector passage 5d ... Ejector spring holding part 5e ... Fixing opening 5f ... Latch member support part 5g ... Slider passage 5h ... Lock pin support parts 5i, 5j ... Operating button guide holes 5k ... Lever member support parts 5m, 5n ... Thickening holes 5p ... Step part 6 ... Upper cover 6a ... Upper surface part 6b ... Side part 6c ... Bridge part 6d ... concave part 7 ... lower cover 7a ... lower surface part 7b ... side face part 7c ... edge part 7d ... claw part 7e ... guide rib 7f ... back rib 8 ... opening parts 8a and 8b ... concave part 9 ... buckle switch 10 ... fixing member 11 ... seat 11a ... Seat part 11b ... Backrest part 11c ... Headrest part 12 ... Seat belt retractor 13 ... Guide anchor 14 ... Belt anchor 15 ... Tan 16 ... Center pillar 21 ... Tapered part 31 ... Flange part 32 ... Claw part 33 ... Slider 33a ... Arm part 34 ... Slider spring 41 ... Operation part 42 ... Inner guide part 43 ... Outer guide part 51 ... Locking hole 52 ... Lock pin 53 ... Ejector 54 ... Ejector spring 55 ... Lever member 61 ... Edge 62 ... Operation button opening 63 ... Reinforcement rib 63a ... Main reinforcement rib 63b ... Sub-reinforcement rib 63c ... Notch 71 ... Convex part 91 ... Movable contact 92 ... Fixed contact 93 ... switch slider 94 ... fixed contact holding means 95 ... shield plate

Claims (8)

A buckle detachably engaged with a tongue of a seat belt device for restraining an occupant to a seat,
A tongue insertion port for inserting the tongue, a latch member engaged with the inserted tongue, an operation button for releasing the engagement of the latch member, and a base member for supporting the latch member and the operation button; An upper cover in which the tongue insertion port is formed and the base member is mounted, a lower cover connected to the upper cover and covering the base member, and formed on the opposite side of the tongue insertion port and fixed to the base member And an opening through which the fixing member is inserted,
An edge formed on the upper cover and forming a part of the opening and covering an upper portion of the base member;
A locking hole formed in the bottom of the base member;
A convex portion formed in the lower cover and inserted through the locking hole;
A pair of lightening holes formed at the corners from the side surface to the bottom of the base member;
A pair of guide ribs formed on the lower surface portion of the lower cover and inserted through the meat hole ,
By placing the base member on the lower surface portion of the lower cover, the convex portion is inserted into the locking hole and the guide rib is inserted into the meat hole.
A buckle characterized by that.   The buckle according to claim 1, wherein the upper cover includes a reinforcing rib formed on an inner surface substantially perpendicular to the edge portion.   The said reinforcing rib is provided with a pair of main reinforcing rib, The sub-reinforcing rib formed in parallel with the said edge part is formed between this main reinforcing rib, The Claim 2 characterized by the above-mentioned. buckle.   4. The buckle according to claim 3, wherein the sub-reinforcing rib has a notch that can avoid interference with the latch member or the drive part of the operation button. 5.   The buckle according to claim 2, wherein the reinforcing rib is formed thinner than the edge portion.   The buckle according to claim 1, wherein a lower end of the edge is disposed at a position that can cover 50% or more of the height of the base member.   The buckle according to claim 1, wherein the convex portion is formed to be thicker than a back rib formed at least partially on the inner surface of the lower cover. A webbing for restraining an occupant to a seat; a seat belt retractor for winding the webbing; a guide anchor provided on a vehicle body side for guiding the webbing; a belt anchor for fixing the webbing to the vehicle body side; A seat belt device having a buckle disposed on a side surface and a tongue disposed on the webbing, and restraining an occupant with the webbing by fitting the tongue to the buckle;
The seat belt device according to any one of claims 1 to 7, wherein the buckle is the buckle according to any one of claims 1 to 7.