JP2007229350A - Tongue and seat belt device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the separation of molded resin while sufficiently exerting respective effects suppressing emission of abnormal noise when coming into contact with a surrounding member and formation of minor flaws and dents in the member. <P>SOLUTION: A hard resin mold part 5b<SB>2</SB>molded with hard resin is provided in a prescribed area including a through-hole of a core part 5c<SB>1</SB>of a metal plate 5c, while soft resin mold parts 5b<SB>3</SB>and 5b<SB>4</SB>molded with soft resin are provided at end parts at both right/left ends of the core part 5c<SB>1</SB>and the opposite side of a locking piece 5a. The end faces 5b<SB>5</SB>and 5b<SB>7</SB>of the side edges of the respective soft resin mold parts 5b<SB>3</SB>and 5b<SB>4</SB>are defined as slope faces and overmolding parts 5b<SB>6</SB>and 5b<SB>8</SB>of the hard resin mold part 5b<SB>2</SB>are provided over the end faces 5b<SB>5</SB>and 5b<SB>7</SB>. The end faces 5b<SB>5</SB>and 5b<SB>7</SB>of the soft resin mold parts 5b<SB>3</SB>and 5b<SB>4</SB>are covered with the overmolding parts 5b<SB>6</SB>and 5b<SB>8</SB>and pushed toward the core part 3c<SB>1</SB>to prevent the separation. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a technical field of a tongue used for, for example, a seat belt device for protecting an occupant seated on a vehicle seat such as an automobile or a safety belt device for protecting an operator at a work site. It is related with the technical field of the tongue which suppresses the abnormal noise which generate | occur | produces when it contacts the member in this, and protects this member.
The present invention also relates to a technical field of a seat belt device provided with such a tongue.

  For example, a seat belt device mounted on a vehicle such as an automobile restrains and protects the inertial movement of an occupant when a large deceleration is applied to the vehicle such as when a vehicle collides. Conventionally, as one of such seat belt devices, for example, there is a three-point seat belt device as shown in FIG. In the figure, 1 is a seat belt device attached to a vehicle seat 2, and 3 is fixed to a vehicle body in the vicinity of the vehicle seat 2 so that the seat belt 4 can be retracted in a normal state and cannot be pulled out in an emergency. The seat belt retractor 5 is a tongue that is slidably supported by the seat belt 4, 6 is a buckle that is fixed to the vehicle seat 2 or the vehicle body, and the tongue 5 is locked, and 7 is a vehicle such as the center pillar 8. It is a belt guide that guides the seat belt 4 attached to the upper side and pulled out from the seat belt retractor 3. The front end 4a of the seat belt 4 pulled out from the seat belt retractor 3 is fixed to the vehicle seat 2 or the vehicle body. In the state shown in FIG. 3, the tongue 5 is not locked to the buckle 6, but the seat belt 4 is pulled out from the seat belt retractor 3 by a predetermined amount.

  In the seat belt device 1 configured as described above, when the occupant wears the seat belt 4, the occupant sits on the vehicle seat 2, pulls out the seat belt 4 from the seat belt retractor 3, and engages the tongue 5 with the buckle 6. After stopping, when the hand is released from the tongue 5, the excessively pulled out seat belt 4 is wound up by the seat belt retractor 3, the slack of the seat belt 4 is eliminated, and the seat belt 4 is attached to the occupant.

The tongue 5 used in the conventional seat belt device 1 is a metal plate that is latched to the buckle 6 when the latch member (not shown) is latched in the latching hole 5a ₁ when inserted into the buckle 6. And a gripping portion 5b that is formed by resin molding on the core portion of the metal plate and grips the locking piece 5a of the tongue 5 for inserting and locking the buckle 6. Yes. In that case, the tongue 5 is slidably supported by the seat belt device 4 by the seat belt 4 passing through the belt through hole 5b ₁ formed in the grip portion 5b.

  By the way, when the seat belt 4 is not attached, the seat belt 4 is normally wound up to the seat belt retractor 3 to the maximum extent, so that the seat belt 4 from the belt guide 7 to the front end portion 4a is attached to the center pillar 8 or the like. Since it is located along the inner wall of the vehicle, the tongue 5 is also located in the vicinity of the inner wall by a tongue stopper (not shown) provided on the seat belt 4. For this reason, when the occupant hits the tongue 5 when getting on and off the vehicle, the tongue 5 may come into contact with the trim on the inner wall of the vehicle. In addition, when the occupant gets off the tongue 5 with the seat belt attached to the buckle 6 and is released from the tongue 6, the seat belt 4 is wound around the seat belt retractor 3. May be lifted as the seat belt 4 is wound, and may contact the trim of the inner wall of the vehicle. Further, when the vehicle travels, the tongue 5 of the seat belt device 1 in which the occupant is not seated on the vehicle seat 2 and the seat belt 4 is not attached is brought into contact with the trim on the inner wall of the vehicle by the vibration of the vehicle travel. Sometimes. In that case, since the tongue 5 is guided by the tongue stopper so that the locking piece 5a faces toward the inside of the vehicle interior, the grip portion 5b is almost the part that contacts the trim on the inner side wall of the vehicle. When the tongue 5 comes into contact with the trim on the inner side wall of the vehicle in this way, not only abnormal noise may be generated, but there is a possibility that a small scratch or dent may be generated on the trim, which may make the vehicle interior uncomfortable. is there.

Therefore, in order to prevent the occurrence of such abnormal noise and the generation of small scratches and dents on the trim, the seat belt is inserted in the grip portion of the tongue that is likely to come into contact with the trim on the inner wall of the vehicle. A relatively hard plastic was molded on the metal plate of the part, and the molded hard plastic was overmolded with a softer plastic than the hard plastic on the part that was likely to come into contact with the inner wall of the vehicle. A tongue of a seat belt device has been proposed (see, for example, Patent Document 1).
According to this tongue, a predetermined strength required for the tongue is secured by molding the seat belt insertion portion with a hard plastic, and the portion with a high possibility of contact with the inner wall of the vehicle is made of a soft plastic. By molding, the generation of abnormal noise and the generation of small scratches and dents such as trim can be suppressed.
US Pat. No. 6,837,519.

  However, in the tongue disclosed in Patent Document 1, a soft plastic is overmolded on a hard plastic. However, because of the soft nature of the soft plastic, it is easy to peel off when a large external force is applied, and the durability is not good. There are problems such as.

  Further, in order to enhance the soundproofing effect or improve the tactile sensation, it is necessary to increase the thickness of the soft plastic mold part. However, in the tongue disclosed in Patent Document 1, since the soft plastic is overmolded on the hard plastic, the thickness of the soft plastic mold portion is small. For this reason, the soundproofing effect cannot be enhanced effectively, and a good tactile sensation cannot be obtained. Therefore, if the thickness of the soft plastic mold portion on the hard plastic is simply increased, there is a problem that the entire gripping portion 5b of the tongue 5 is enlarged.

The present invention has been made in view of such circumstances, and its purpose is to suppress the generation of abnormal noise when contacting a surrounding member and the effects of suppressing the generation of small scratches and dents on the member. An object of the present invention is to provide a tongue that can be sufficiently obtained, suppress peeling of a molded resin, obtain good durability, and prevent enlargement.
Still another object of the present invention is to provide a seat belt device that can suppress the generation of abnormal noise when the tongue contacts the inner wall of the vehicle and protect the inner wall of the vehicle, thereby making the vehicle interior more comfortable. Is to provide.

  In order to solve the above-described problem, the tongue of the invention of claim 1 is a metal plate having a locking piece engageable with a buckle and a core portion formed integrally with the locking piece, and the core portion. A tongue that is resin-molded and is provided integrally with the locking piece and supported by a belt, and is configured to engage the locking piece with the buckle. The flexible resin mold comprises: a rigid resin mold portion molded with a hard resin at a predetermined portion of the core portion of the plate; and a flexible resin mold portion molded with a resin softer than the hard resin at another predetermined portion of the core portion. At least a part of the end face of the part is covered with an overmolded part overmolded with the hard resin.

  Further, in the tongue of the invention of claim 2, the end surface of the flexible resin mold part is an inclined surface protruding on the side closely contacting the core part, and at least a part of the inclined surface is covered by the overmold part. It is characterized by being.

  Furthermore, the tongue of the invention of claim 3 is characterized in that the surface of the flexible resin mold part protrudes outward from the surface of the hard resin mold part and the surface of the overmold part.

Furthermore, the tongue of the invention of claim 4 is characterized in that the flexible resin mold portion has both the left and right end portions of the core portion and the locking piece when the direction connecting the locking piece and the gripping portion is the front-rear direction. And the flexible resin mold part on the opposite side of the locking piece and the flexible resin mold part on the opposite side of the locking piece are spaced apart from each other.
The space between the flexible resin mold portion at the left and right side ends and the flexible resin mold portion at the end opposite to the locking piece is a hard resin mold portion. Tongue.

Furthermore, the seat belt device of the invention of claim 5 is a seat belt, a seat belt retractor that winds up the seat belt, a tongue that is slidably supported by the seat belt, and the tongue is inserted and engaged. A seat belt device comprising at least a buckle, wherein the seat belt is mounted on an occupant by inserting and engaging the tongue with the buckle;
The tongue is the tongue according to any one of claims 1 to 3.

  According to the tongue of the present invention having such a configuration, a rigid resin mold portion is formed at a predetermined location of the core portion of the metal plate, and a flexible resin mold portion is formed at another predetermined location of the core portion of the metal plate. Therefore, the flexible resin mold part becomes a cushioning material when the member in the vicinity of the tongue contacts the flexible resin mold part, so that small scratches and dents generated on this member can be suppressed, and by contact The generated abnormal noise can be effectively suppressed.

  In addition, since at least a part of the end face of the flexible resin mold part is covered by the overmold part molded with a hard resin, the end face of the flexible resin mold part is pressed against the core part of the metal plate with this overmold part. Will be able to. Accordingly, it is possible to firmly hold the tip edge of the end face of the flexible resin mold part and the core part firmly, and it is possible to prevent the tip edge of the end face of the flexible resin mold part from peeling off from the core part.

  In this way, according to the tongue of the present invention, it is possible to sufficiently obtain the respective suppression effects of the generation of abnormal noise and the generation of small scratches and dents on the member when the tongue is in contact with the neighboring members. However, good durability can be obtained by suppressing the peeling of the molded soft resin.

  In particular, according to the tongue of the invention of the second aspect, the end surface of the flexible resin mold portion is an inclined surface protruding from the side closely contacting the core portion, and at least a part of the inclined surface is covered by the overmold portion. The overmold portion can effectively press the end surface of the flexible resin mold portion against the core portion of the metal plate. Accordingly, it is possible to more firmly hold the tip edge of the end face of the flexible resin mold portion and the core portion, and it is possible to more effectively prevent the tip edge of the end surface of the flexible resin mold portion from peeling off from the core portion.

  Further, according to the tongue of the invention of claim 3, since the surface of the flexible resin mold part is projected outward from the surface of the hard resin mold part and the surface of the overmold part, the flexible resin mold part is It is possible to effectively contact a nearby member, more effectively suppress small scratches and dents generated on the member, and more effectively suppress abnormal noise generated by contact. it can. In particular, the thickness of the flexible resin mold part can be set large in combination with the provision of the flexible resin mold part directly on the core part of the metal plate. Therefore, the soundproofing effect by the flexible resin mold part can be enhanced, the tactile sensation can be improved by the larger soft elasticity of the flexible resin mold part, and the soft resin is directly molded on the metal plate, so the wall thickness is set large Even so, an increase in the size of the tongue gripping portion can be prevented.

  Furthermore, according to the tongue of the invention of claim 4, the flexible resin mold portion provided at the left and right side end portions of the core portion and the locking piece when the direction connecting the locking piece and the gripping portion is the front-rear direction. The flexible resin mold part provided on the opposite end is separated from each other, and the separation region is a rigid resin mold part molded with a hard resin on the core part, so the flexible resin mold part is provided directly on the core part. However, the strength of the grip portion of the tongue can be increased and the durability can be improved.

  Furthermore, according to the seat belt device of the fifth aspect of the invention, by using the tongue capable of obtaining the above-described effect for the tongue of the vehicle seat belt device, even if the tongue contacts the inner wall of the vehicle, the noise Since the generation | occurrence | production of this can be suppressed and the inner wall of a vehicle can be protected, a vehicle interior can be made more comfortable. And since the enlargement of the holding part of a tongue can be prevented, the operativity of a tongue can be improved. Therefore, the tongue can be smoothly inserted into and engaged with the buckle, and the seat belt can be easily attached.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 shows an example of an embodiment of a tongue according to the present invention, where (a) is a plan view of the tongue, (b) is a sectional view taken along line IB-IB in (a), and (c) is (a) ) Is a cross-sectional view taken along the line IC-IC in FIG. In the following description, the same components as those in the conventional example shown in FIG. 3 described above are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIGS. 1 (a) and 1 (b), the tongue 5 of this example is formed in a T-shape from a locking piece 5a and a gripping portion 5b in the same manner as a conventional tongue, and the locking piece is formed on one side. 5a is and the other side is provided is provided with a T-shaped metal plate 5c to be used as a core portion 5c ₁ of the gripper 5b of the resin mold. The core portion 5c ₁ of the metal plate 5c are formed through-holes of substantially similar shape to the belt through hole 5b ₁ for constituting the belt through hole 5b ₁ of the seat belt 4 to pass through (not shown), the core a predetermined portion including the through-hole parts 5c _1, left and right end portions of the core 5c ₁ of the metal plate 5c (upper and lower ends in FIG. 1 (a); that is, right and left, the locking piece 5a in a plan view the gripper 5b and the left and right when the front and rear direction and a direction connecting the) and the core portion 5c ₁ of the other end side of the metal plate 5c; the right end in (end of the locking piece 5a opposite FIGS. 1 (a) ) Except for a region (corresponding to a predetermined portion of the present invention) is provided with a hard resin mold portion 5b ₂ molded with a relatively hard resin. The stiffness resin mold portion 5b ₂ are provided on the inner peripheral surface of the metal plate 5c both surfaces of the core portion 5c ₁ of the outer peripheral surface of the core portion 5c ₁ of the metal plate 5c, and the core portion 5c ₁ of the through hole. A belt through hole 5b ₁ through which the seat belt 4 passes is formed by a hard resin mold portion 5b ₂ provided on the inner peripheral surface of the through hole of the core portion 5c ₁ . The tongue 5 is slidably supported by the seat belt 4 by the seat belt 4 passing through the belt through hole 5b ₁ .

The belt through-hole 5b ₁ is formed with a recessed fitting portion 5b ₁ ′. When the belt is not attached, a well-known tongue stopper (not-known) provided on the seat belt 4 at the recessed fitting portion 5b ₁ ′ is provided. The engaging piece 5a is guided by the tongue stopper so as to face in the direction of the passenger compartment, and is positioned in the vicinity of the side wall of the passenger compartment.

Also, hard resin mold portion 5b ₂ is not provided, left and right end portions of the core 5c ₁ of the metal plate 5c (corresponding to the other predetermined portion of the present invention), respectively, of the hard resin mold portion 5b ₂ molded resin A soft resin mold portion 5b ₃ is provided, and the other end side portion of the core portion 5c ₁ of the metal plate 5c (the end portion on the opposite side of the locking piece 5a; corresponding to another predetermined portion of the present invention) Are provided with a flexible resin mold portion 5b ₄ made of the same soft resin.

In this case, 1 the soft resin mold portion 5b ₃ provided on the left and right end portions of the core 5c ₁ as shown in (c) is double-sided and left and right end portions of the right and left ends of the core portion 5c ₁ It is provided so as to cover the outer peripheral surface. Then, the inclined surface the end face 5b ₅ of side edges opposing to the belt through hole 5b ₁ in the left and right end portions of the soft resin mold portion 5b ₃ is the side in close contact with the core portion 5c ₁ protrudes toward the belt through hole 5b ₁ It is said that.

The hard resin mold part 5b ₂ has an overmold part 5b ₆ in which a hard resin is overmolded on the inclined end face 5b _{5 of the} soft resin mold part 5b ₃ . In that case, the thickness of the soft resin mold portion 5b ₃ (thickness) is set thicker than the thickness of the hard resin mold portion 5b _2, the outer exterior surface of the soft resin mold portion 5b ₃ is hard resin mold portion 5b ₂ It protrudes outward from the surface by a predetermined amount α. Thus, the over-mold part 5b ₆ stiffness resin mold portion 5b ₂ are provided in a region corresponding to the thickness of the hard resin mold portion 5b ₂ at the end face 5b ₅ of soft resin mold portion 5b _3, soft resin mold portion This region of the end face 5b ₅ of 5b ₃ is covered.

By thus over-mold part 5b ₆ stiffness resin mold portion 5b ₂ covers the end face 5b ₅ of soft resin mold portion 5b _3, overmold 5b ₆ stiffness resin mold portion 5b _2, each soft resin mold The end surface 5b ₅ of the part 5b ₃ is pressed against the core part 5c ₁ . Therefore, the distal edge of the end face 5b ₅ of the soft resin mold portion 5b ₃ is adhesion between the core portion 5c ₁ is firmly held, the core 5c ₁ is the distal edge of the end face 5b ₅ of the soft resin mold portion 5b ₃ It will not peel off easily.

On the other hand, soft resin mold portion 5b ₄ provided on the other end side of the core portion 5c ₁ as shown in FIG. 1 (d), like the soft resin mold portion 5b ₃ described above, the core portion 5c ₁ It is provided so as to cover both surfaces of the other end side portion and the outer peripheral surface of the other end side portion. Then, the end surface 5b ₇ of side edges facing the belt through hole 5b ₁ in the soft resin mold portion 5b ₄ of the other end side is inclined to the side in close contact with the core portion 5c ₁ protrudes toward the belt through hole 5b ₁ It is considered as a surface.

The rigid resin mold portion 5b ₂ also has an overmold portion 5b ₈ in which a rigid resin is overmolded on the inclined end surface 5b _{7 of the} flexible resin mold portion 5b ₄ . In that case, the thickness of the soft resin mold portion 5b ₄ is set larger than the thickness of the hard resin mold portion 5b _2, Tokoro than the outer surface of the outer surface of the hard resin mold portion 5b ₂ of soft resin mold portion 5b ₄ It protrudes outward by a fixed amount α. Thus, the over-mold part 5b ₈ stiffness resin mold portion 5b ₂ are provided in a region corresponding to the thickness of the hard resin mold portion 5b ₂ at the end face 5b ₇ of soft resin mold portion 5b _4.

  As a material of the metal plate 5c, S55C, S50C, or the like can be used. Further, as the hard resin, polyamide, polypropylene, or the like can be used, and as the soft resin, elastomer, foamed urethane, or the like can be used. Needless to say, the metal plate 5c, the hard resin, and the soft resin are not limited to these materials, and other materials can be used.

Further, the outer surfaces of the flexible resin mold parts 5b ₃ and 5b ₄ both protrude outward by a predetermined amount α from the outer surface of the hard resin mold part 5b ₂ , so that the flexible resin mold parts 5b of the gripping part 5b. ₃ and 5b ₄ mainly contact members such as a vehicle interior side wall around the tongue 5, and the resin mold portion 5b ₂ of the grip portion 5b hardly comes into contact.
Furthermore, since the thickness of each flexible resin mold part 5b ₃ , 5b ₄ is set large, the soundproofing effect is enhanced and the tactile sensation is improved by the soft elasticity of each flexible resin mold part 5b ₃ , 5b _4. Yes.

As shown in FIG. 1 (a), provided apart from each other without continuous and soft resin mold portion 5b ₄ of both soft resin mold portion 5b ₃ and the other end side of the left and right end portions, of A part 5b _{9 of the} separation region is a hard resin mold part 5b ₂ in which a hard resin is molded on the core part 3c ₁ . Thus, by providing the hard resin mold part 5b ₄ in the part 5b ₉ between the both flexible resin mold parts 5b ₃ and the flexible resin mold part 5b ₄ without providing the soft resin mold part, the core part 5c is provided. _{Even if} each flexible resin mold part 5b ₃ , 5b ₄ is provided directly on ₁ , the strength of the grip part 5b of the tongue 5 is increased and the durability is improved.
The other configuration of the tongue 5 in this example is the same as that of the conventional example shown in FIG. Moreover, the tongue 5 of this example is used for the seat belt apparatus 1 to which the seat belt 4 is mounted by engaging the tongue 5 with the buckle, for example, including the conventional seat belt apparatus 1 shown in FIG. Can do.

According to the tongue 5 of this example, the flexible resin mold parts 5b ₃ and 5b ₄ are provided at the left and right ends of the grip part 5b of the tongue 5 and the end opposite to the locking piece 5a, and the flexible resin mold part 5b ₃ , 5b ₄ is projected from the surface of the hard resin mold portion 5b ₂ so that the flexible resin mold portion 5b is brought into contact with the inner side wall of the vehicle such as the center pillar 8 in the vicinity of the tongue 5. The soft resin mold portion 5b is a cushioning material, so that it is possible to effectively suppress small scratches and dents generated on members such as trims on the inner side wall of the vehicle, and to effectively suppress sounds generated by contact. can do.

Further, since the end surface 5b ₅ of the flexible resin mold portion 5b ₃ is covered by the overmold portion 5b ₆ of the rigid resin mold portion 5b ₂ , the end surface 5b of each flexible resin mold portion 5b ₃ is covered by this overmold portion 5b _{6. 5} it is possible to press the core part 5c ₁ a. Therefore, it is possible to firmly maintain the close contact between the end edge 5b ₅ of each flexible resin mold portion 5b ₃ and the core portion 5c _1, and the end edge of the end surface 5b ₅ of each flexible resin mold portion 5b ₃ is the core portion. it is possible to prevent the peeling from 5c _1.

  In this way, it is possible to sufficiently obtain the respective suppressing effects of the generation of abnormal noise when the tongue 5 contacts the inner wall of the vehicle and the generation of small scratches and dents on members such as the trim of the inner wall. In addition, it is possible to obtain good durability by suppressing peeling of the molded soft resin.

Furthermore, by setting the thickness of each flexible resin mold part 5b ₃ , 5b ₄ to be large, the soundproofing effect can be enhanced, and the soft elasticity of each flexible resin mold part 5b ₃ , 5b ₄ can improve the tactile sensation. Since the soft resin is directly molded on the metal plate 4c, the increase in the size of the grip 5b of the tongue 5 can be prevented even if the wall thickness is set large.

Further, the flexible resin mold portion 5b ₃ provided at the left and right ends of the core portion 5c ₁ and the flexible resin mold portion 5b ₄ provided at the end opposite to the locking piece 5a are separated from each other, and this separation region since a hard resin mold portion 5b ₂ were molded with rigid resin for the core portion 5c ₁ a, even when the provided core 5c ₁ directly soft resin mold portion 5b _3, 5b _4, the strength of the gripper 5b of the tongue 5 It can be increased and durability can be improved.

  Further, by using the tongue 5 capable of obtaining such a special effect for the tongue of the seat belt device 1 of the vehicle, even if the tongue 5 comes into contact with the inner wall of the vehicle, the generation of abnormal noise is suppressed and the vehicle Since the inner wall can be protected, the passenger compartment can be made more comfortable. And since the enlargement of the holding part 5b of the tongue 5 can be prevented, the operability of the tongue 5 can be improved. Therefore, the insertion engagement of the tongue 5 with the buckle 6 can be performed smoothly, and the seat belt 4 can be easily attached.

In the above-described example, the end surfaces 5b ₅ and 5b ₇ of the flexible resin mold portions 5b ₃ and 5b ₄ are inclined surfaces. However, the end surfaces 5b ₅ and 5b ₇ are not necessarily inclined surfaces. For example, as shown in FIGS. 2A and 2B, the end surfaces 5b ₅ and 5b ₇ of the flexible resin mold portions 5b ₃ and 5b ₄ are formed in a stepped shape, and the thin portions 5b ₁₀ , The end faces 5b ₅ and 5b ₇ can also be covered by overmolding 5b ₁₁ with the overmold parts 5b ₆ and 5b ₈ respectively. In short, the end surfaces 5b ₅ and 5b ₇ can be formed in any shape as long as the end surfaces 5b ₅ and 5b ₇ can be covered by the overmolded portions 5b ₆ and 5b _8. it can.

  In the above example, the tongue of the present invention is applied to the tongue of a seat belt device attached to the seat of a vehicle such as an automobile. However, the present invention is not limited to this, and The present invention can also be applied to a tongue used for protecting a member used in a safety belt device for protecting an operator at the site or the like when the member contacts a surrounding member.

  In the tongue of the present invention, for example, a tongue used for a seat belt device for protecting an occupant seated on a seat of a vehicle such as an automobile or a safety belt device for protecting an operator at a work site contacts a member around the tongue. It can be suitably used for an apparatus that needs to suppress abnormal noise that occurs sometimes, and an apparatus that needs to protect this member when the tongue and the member are in contact with each other.

An example of embodiment of the tongue concerning this invention is shown, (a) is a top view of a tongue, (b) Sectional drawing which follows the IB-IB line in (a), (c) is IC-IC in (a) Sectional drawing which follows a line, (d) is a partial expanded sectional view in (b). The other example of embodiment of the tongue concerning this invention is shown, (a) is sectional drawing similar to FIG.1 (c), (b) is sectional drawing similar to FIG.1 (d). It is a perspective view which shows an example of the conventional three-point type seatbelt apparatus.

Explanation of symbols

1 ... seat belt apparatus, 3 ... seat belt retractor, 4 ... seat belt, 5 ... tongue, 5a ... engaging pieces, 5a ₁ ... locking hole, 5b ... gripper, 5b ₁ ... belt through hole, 5b ₂ ... Ken Resin mold part, 5b ₃ , 5b ₄ ... flexible resin mold part, 5b ₅ , 5b ₇ ... end face, 5b ₆ , 5b ₈ ... overmold part, 5c ... metal plate, 5c ₁ ... core part, 6 ... buckle

Claims (5)

A metal plate having a locking piece engageable with the buckle and a core portion formed integrally with the locking piece, and resin-molded on the core portion and provided integrally with the locking piece and supported by a belt In the tongue comprising a grip portion for engaging the locking piece with the buckle,
The gripping portion is a hard resin mold portion molded with a hard resin at a predetermined portion of the core portion of the metal plate, and a soft resin mold portion molded with a softer resin than the hard resin at another predetermined portion of the core portion. Consists of
A tongue having at least a part of an end surface of the flexible resin mold portion covered with an overmold portion overmolded with the hard resin.   2. The end surface of the flexible resin mold part is an inclined surface protruding from the side closely contacting the core part, and at least a part of the inclined surface is covered with the overmold part. The described tongue.   The tongue according to claim 1 or 2, wherein the surface of the flexible resin mold part protrudes outward from the surface of the hard resin mold part and the surface of the overmold part. The flexible resin mold portion is provided at the left and right side end portions of the core portion and the end portion on the opposite side of the locking piece when the direction connecting the locking piece and the gripping portion is the front-rear direction. And the flexible resin mold part on the left and right side ends and the flexible resin mold part on the opposite side to the locking piece are separated from each other,
The space | interval area | region of the flexible resin mold part of the said right-and-left both-ends part and the flexible resin mold part of the edge part on the opposite side to the said locking piece is made into the rigid resin mold part. The tongue according to any one of the above. A seat belt; a seat belt retractor that winds up the seat belt; a tongue that is slidably supported by the seat belt; and a buckle into which the tongue is inserted and engaged, and the tongue is inserted into the buckle. In the seat belt device in which the seat belt is attached to the occupant by being engaged,
5. The seat belt device according to claim 1, wherein the tongue is the tongue according to any one of claims 1 to 4.

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