JP6336907B2 - Belt adjuster - Google Patents

Description

  The present invention relates to a belt adjuster that adjusts the length of a belt.

  As a conventional belt adjuster, a belt insertion portion is formed by an opposed bottom wall portion, a front wall portion, and opposed side wall portions, and a locking piece is provided on the front wall portion so as to be elastically deformable by a slit. A locking claw that locks the belt so that it cannot be returned to one side is projected at the tip of the belt, and tapered portions are provided on both side portions of the locking piece, and both side wall portions are provided with tapered portions on both side portions of the locking piece. There has been known one that is provided with an operation unit that abuts and deforms the front end of the locking piece outward (see, for example, Patent Document 1).

  Other conventional belt adjusters include a belt having adjustment protrusions protruding on the surface at equal intervals, and an adjuster body having a belt insertion portion penetrating in the left-right direction and having an operation piece insertion hole formed on the upper surface. The operation piece is inserted between the operation piece insertion hole so as to be slidable in the vertical direction, and is provided between the adjuster body and the operation piece. A thing provided with the spring which urges an operation piece upwards is known (for example, refer to patent documents 2).

Japan National Fair No. 02-027763 Japanese Unexamined Patent Publication No. 10-179215

  By the way, in the buckle described in Patent Document 1, the engagement between the locking claw and the belt cannot be released unless the two operation parts are pressed simultaneously. Further, in the buckle described in Patent Document 2, the engagement between the locking claw and the belt can be released by operating only one operation piece, but the adjustment protrusions are formed in two rows on the belt. For this reason, the belt width dimension is large, and the belt adjuster has become larger.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to release the engagement between the locking claw and the belt only by operating one operation piece, and to increase the size of the belt adjuster. An object of the present invention is to provide a belt adjuster that can prevent the formation of a belt.

The above object of the present invention can be achieved by the following constitution.
(1) A belt in which a large number of locking portions are formed on the surface, a front plate and a back plate that are spaced apart in parallel in the front and back directions, and an upper plate that connects the upper ends of the front plate and the back plate, An adjuster main body having a belt insertion portion formed along the left-right direction, through which the belt is inserted by the front surface plate, the rear surface plate, the upper surface plate, and the lower surface plate. And an operation piece slidably disposed on the belt insertion portion, the surface plate forms a slit, and one end portion in the left-right direction is connected to the surface plate. It has a stop piece, and the lock piece is a belt adjuster having a lock claw that can be engaged with the lock portion of the belt at the tip, and the operation piece and the lock piece are arranged facing each other in the front and back direction. is, the locking piece has a first cam which is protruded toward the operating pieces on the front and back direction, Sakuhen is protruded toward the engaging piece on the front and back direction, a second cam contacting the first cam contact, together with the first cam is provided in the vertical direction substantially central portion of the rear surface of the locking piece , Having an inclined surface whose projection amount gradually increases as the operation piece slides away from the second cam, and the second cam is arranged so as to always overlap the locking piece in the sliding direction of the operation piece. Belt adjuster characterized by that.
(2) The belt adjuster according to (1), further comprising a spring that urges the operation piece in one of the vertical directions, and the operation piece has a spring fitting recess that holds the spring.
(3) The belt adjuster according to (2), wherein the spring fitting concave portion has a pair of spring locking convex portions for locking one leg portion and the other leg portion of the spring, respectively.
(4) The belt adjuster according to (2) or (3), wherein the spring is a torsion coil spring.
(5) The belt adjuster according to (1), further comprising a spring that biases the operation piece in one of the vertical directions.
(6) The operation piece is inserted into the operation piece insertion holes of the upper surface plate and the lower surface plate, and the operation piece is elastically deformed in the left-right direction when the operation piece is inserted into the operation piece insertion hole, and the width is reduced. The belt adjuster according to any one of (1) to (5), wherein the belt adjuster has a pair of left and right retaining portions that are wide in the direction and are in contact with the lower surface of the upper plate.
(7) The belt adjuster according to (1) or (6), wherein the operation piece integrally includes a spring portion that urges the operation piece in one of the vertical directions.

According to the belt adjuster of the present invention, the operation piece and the locking piece are arranged to face each other in the front and back direction, and the locking piece has a first cam that protrudes toward the operation piece in the front and back direction , Since the operating piece has a second cam that protrudes toward the locking piece in the front and back direction and contacts the first cam, the engagement between the locking claw and the belt can be released by operating only one operating piece. can do. Moreover, since the width direction dimension of the belt does not increase as in the prior art, it is possible to prevent the belt adjuster from becoming large. In addition, the first cam is provided at a substantially central portion in the vertical direction on the back surface of the locking piece, and has an inclined surface whose protruding amount gradually increases as the operation piece slides away from the second cam. Since the two cams are arranged so as to always overlap with the locking piece in the sliding direction of the operation piece, the push-up force is appropriately applied to the vertical central portion of the locking piece without twisting the locking piece. It is pushed up with good balance. For this reason, the engagement between the locking claw of the locking piece and the belt can be released with a minimum push-up amount.

It is a surface view explaining one Embodiment of the belt adjuster which concerns on this invention. It is the sectional view on the AA line shown in FIG. It is the BB sectional view taken on the line shown in FIG. It is CC sectional view taken on the line shown in FIG. It is a perspective view which shows the state which deleted the surface plate and the belt from FIG. It is a top view which shows the state which deleted the surface plate from FIG. It is an enlarged view of the periphery of the coil spring of FIG. It is a right view of the periphery of the coil spring of FIG. It is sectional drawing corresponding to FIG. 2 which shows the state by which the latching piece was pushed up by the press of the operation piece. FIG. 5 is a cross-sectional view corresponding to FIG. 4 showing a state in which the engagement piece is pushed up and the engagement between the engagement claw of the engagement piece and the engagement recess of the belt is released. It is a top view corresponding to FIG. 6 explaining the 1st modification of one Embodiment of the belt adjuster which concerns on this invention. It is a top view corresponding to Drawing 6 explaining the 2nd modification of one embodiment of a belt adjuster concerning the present invention.

  Hereinafter, an embodiment of a belt adjuster according to the present invention will be described in detail with reference to the drawings. In the following description, the upper side is the upper side with respect to the paper surface of FIG. 1, the lower side is the lower side with respect to the paper surface of FIG. 1, the right side is the right side with respect to the paper surface of FIG. The left side of the paper surface, the front surface side is the front side of the paper surface of FIG. 1, and the back surface side is the back side of the paper surface of FIG.

  The belt adjuster 10 of the present embodiment includes a belt 11, an adjuster body 20, an operation piece 40, and a coil spring (spring) 50 that urges the operation piece 40 upward, as shown in FIGS. The length of the belt 11 inserted through the belt 20 in the left-right direction can be adjusted. The adjuster body 20 and the operation piece 40 are formed by injection molding of synthetic resin.

  The belt 11 is formed into a thin thin plate shape by using an elastically deformable synthetic resin, leather, synthetic rubber or the like, and a rectangular locking recess (engagement) extending along the width direction of the belt 11 is formed on the surface thereof. A number of stop portions 12 are formed.

  The adjuster body 20 includes a front surface plate 21 and a back surface plate 22 that are spaced apart in parallel in the front and back directions, a top surface plate 23 that connects the upper end portions of the front surface plate 21 and the back surface plate 22, and the front surface plate 21 and the back surface plate 22. And a lower surface plate 24 connecting the lower end portions of the lower surface plate.

  Further, the adjuster body 20 is formed with a belt insertion portion 25 defined by the front surface plate 21, the back surface plate 22, the upper surface plate 23, and the lower surface plate 24 along the left-right direction. Is inserted.

  As shown in FIG. 2, the upper plate 23 and the lower plate 24 are respectively formed with operation piece insertion holes 26 through which the operation pieces 40 are slidably inserted. The sliding of the operation piece 40 is guided by the upper and lower operation piece insertion holes 26. The belt insertion part 25 is formed closer to the back plate 22 than the operation piece insertion hole 26. For this reason, the space extending in the left-right direction of the belt insertion portion 25 and the space connecting the upper and lower operation piece insertion holes 26 are separated from each other in the front-back direction within the adjuster body 20 and are in cross communication. Therefore, it can be said that the operation piece 40 is slidably disposed on the belt insertion portion 25.

  Further, as shown in FIG. 1, a U-shaped slit 27 is formed on the surface plate 21, and a cantilever-shaped locking piece 28 whose right end is connected to the surface plate 21 is formed. Yes. Further, as shown in FIG. 4, a locking claw 29 extending toward the back plate 22 is formed at the tip of the locking piece 28. Engages with the locking recess 12. The U-shaped slit 27 described above means that the upper side, the lower side, and the left side of the locking piece 28 in FIG. 1 are not connected to the surface plate 21, that is, the slit 27 is the surface plate. 21 is a slit hole penetrating 21 in the plate thickness direction.

  As shown in FIG. 2, a first cam 30 that protrudes toward the operation piece 40 is formed at a substantially vertical central portion on the back surface of the locking piece 28. The first cam 30 has an inclined surface 30a in which the protruding amount gradually increases as it goes downward.

  As shown in FIGS. 5 and 6, the operation piece 40 is guided by the operation piece insertion holes 26 of the upper surface plate 23 and the lower surface plate 24 and is slidably inserted. A pressing operation portion 42 provided on the upper portion and projecting upward from the operation piece insertion hole 26 of the upper surface plate 23.

  Further, as shown in FIG. 2, a second cam 43 that protrudes toward the locking piece 28 and abuts on the first cam 30 is formed on the surface of the plate-like portion 41. When the operation piece 40 is pressed downward, the second cam 43 presses the first cam 30 and pushes the locking piece 28 upward.

  Further, as shown in FIGS. 5 and 6, a pair of left and right retaining portions 45 are formed on the left and right side surfaces of the operation piece 40 so as to protrude obliquely upward and downward in a substantially reverse C shape. The pair of left and right retaining portions 45 can be elastically deformed in the left-right direction.

  When the operation piece 40 is inserted into the operation piece insertion hole 26, the pair of left and right retaining portions 45 elastically deform in the left and right direction to reduce the width and pass through the operation piece insertion hole 26, thereby adjusting the main body 20. Assembled into. Then, after passing through the operation piece insertion hole 26, it opens in the left-right direction by an elastic force, becomes wide, and comes into contact with the lower surface 23 a of the upper surface plate 23. As a result, the operation piece 40 is prevented from coming out of the adjuster body 20.

  As shown in FIGS. 5 to 8, the operation piece 40 is formed with a spring fitting recess 46 that houses and holds the coil spring 50. The spring fitting recess 46 is formed in a substantially U shape that opens in the right direction in FIG.

  A cylindrical spring fitting convex portion 47 is formed at the center of the U-shaped arc portion 46 a of the spring fitting concave portion 46. A pair of spring locking projections 48 a and 48 b are formed at the upper and lower opening ends of the spring fitting recess 46 so as to protrude into the spring fitting recess 46, respectively.

  The coil spring 50 is a torsion coil spring made of a metal wire having elasticity, and includes a coil part 51 and a pair of leg parts 52 and 53 extending from the coil part 51 as shown in FIGS. The coil spring 50 is accommodated in the spring fitting concave portion 46 with the coil portion 51 fitting into the spring fitting convex portion 47. Thereby, since the thickness of the operation piece 40 can be suppressed to the minimum, the belt adjuster 10 can be made thin.

  The upper leg 52 abuts against the upper surface of the spring fitting recess 46, and the upper spring locking projection 48a prevents the spring fitting recess 46 from dropping off. The lower leg 53 is prevented from dropping from the spring fitting recess 46 by the lower spring locking projection 48b. Further, the lower leg portion 53 is locked to a spring locking groove 31 formed on the upper surface of the lower surface plate 24 of the adjuster body 20. For this reason, the operation piece 40 is always urged upward by the elastic force of the coil spring 50.

  In the belt adjuster 10 configured as described above, as shown in FIGS. 2 and 4, the operation piece 40 is positioned upward by the urging force of the coil spring 50 in a normal state. At this time, since the second cam 43 of the operating piece 40 does not press the first cam 30 of the locking piece 28, the locking claw 29 of the locking piece 28 engages with the locking recess 12 of the belt 11. The movement of the belt 11 in the left-right direction is restricted.

  When the length of the belt 11 is adjusted, as shown in FIGS. 9 and 10, the operation piece 40 is pushed down against the urging force of the coil spring 50 (see the arrow D), so that the second of the operation piece 40 is adjusted. The cam 43 presses the first cam 30 of the locking piece 28, and the locking piece 28 is pushed up to the surface side (see arrow E). As a result, the engagement between the locking claw 29 of the locking piece 28 and the locking recess 12 of the belt 11 is released, and the belt 11 can be moved in the left-right direction.

  At this time, since the first cam 30 is arranged at the center in the vertical direction of the locking piece 28, a pushing force acts on the central part in the vertical direction of the locking piece 28, and the locking piece 28 is twisted. It is pushed up with good balance. For this reason, it is possible to release the engagement between the locking claw 29 of the locking piece 28 and the locking recess 12 of the belt 11 with a minimum push-up amount.

  Further, after the belt length is adjusted, the operation piece 40 is moved upward by the urging force of the coil spring 50 by releasing the depression of the operation piece 40, and the locking piece 28 is returned to the original position. As a result, the locking claw 29 of the locking piece 28 engages with the locking recess 12 of the belt 11 and the movement of the belt 11 in the left-right direction is restricted. Thus, the length of the belt 11 can be easily adjusted by operating the operation piece 40. Further, when removing the belt 11 from the adjuster body 20, the belt 11 may be removed from the adjuster body 20 while the operation piece 40 is kept pressed down.

  As described above, according to the belt adjuster 10 of the present embodiment, the locking piece 28 has the first cam 30 that protrudes toward the operation piece 40, and the operation piece 40 has the locking piece 28. And the second cam 43 that abuts against the first cam 30, the locking claw 29 of the locking piece 28 and the locking recess of the belt 11 can be simply operated by operating one operating piece 40. The engagement can be released. Further, since the belt width dimension is not increased as in the prior art, it is possible to prevent the belt adjuster 10 from being enlarged.

  Further, according to the belt adjuster 10 of the present embodiment, the operation piece 40 has the spring fitting recess 46 that holds the coil spring 50, and the spring fitting recess 46 engages the leg portions 52 and 53 of the coil spring 50, respectively. Since the pair of spring locking projections 48a and 48b to be stopped is provided, the assembly of the belt adjuster 10 can be improved by preventing the coil spring 50 from falling off the operation piece 40 when the belt adjuster 10 is assembled. it can. Further, since the coil spring 50 is accommodated in the spring fitting recess 46, the thickness of the operation piece 40 can be minimized, and the belt adjuster 10 can be made thin.

  Further, according to the belt adjuster 10 of the present embodiment, the operation piece 40 is elastically deformed to be reduced in width when inserted into the operation piece insertion hole 26, and is widened by opening in the left-right direction after insertion. Since the pair of left and right retaining portions 45 abutting against the lower surface 23 a are provided, the operation piece 40 can be assembled to the adjuster body 20 simply by inserting the operation piece 40 into the operation piece insertion hole 26 when the belt adjuster 10 is assembled. it can. Therefore, the assemblability of the belt adjuster 10 can be improved.

  Further, according to the belt adjuster 10 of the present embodiment, since the sliding of the operation piece 40 is guided by the upper and lower operation piece insertion holes 26, the operation piece 40 can be operated smoothly, and the belt adjuster 10 Operability can be improved.

  As a first modification of the present embodiment, as shown in FIG. 11, the spring fitting recess 46 and the coil spring 50 are deleted from the above embodiment, and the operation piece 40 is attached to the lower end portion of the operation piece 40 upward. A thin plate-like spring portion 60 that is energized may be integrally formed, and a bottom plate 61 that receives the elastic force of the spring portion 60 may be formed at the lower end portion of the lower operation piece insertion hole 26. Thereby, the operation piece insertion hole 26 is formed in a concave shape. Moreover, the front-end | tip part 60a of the spring part 60 is formed in circular shape or spherical shape.

  Further, as a second modification of the present embodiment, as shown in FIG. 12, a normal U-shaped or J-shaped spring 70 may be used instead of the coil spring 50 that is a torsion coil spring. The spring 70 includes a bending portion 71 and a pair of leg portions 72 and 73 extending from the bending portion 71, and is housed in the spring fitting recess 46, similar to the coil spring 50.

In addition, this invention is not limited to what was illustrated to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.
For example, in the above-described embodiment, the adjuster body 20 and the operation piece 40 are made of synthetic resin, but are not limited thereto, and may be made of metal.
Moreover, in the said embodiment, although the many latching recessed parts 12 of the belt 11 are rectangular recessed parts, it is not limited to this, The cross-sectional saw blade-like continuous unevenness | corrugation may be sufficient.
Moreover, in the said embodiment, although the slit 27 is formed in the U shape, it is not limited to this, A C shape, a semi-elliptical shape, etc. may be sufficient and the shape is arbitrary.

10 Belt adjuster 11 Belt 12 Locking recess (Locking portion)
20 adjuster body 21 surface plate 22 back plate 23 upper surface plate 23a lower surface 24 lower surface plate 25 belt insertion portion 26 operation piece insertion hole 27 slit 28 locking piece 29 locking claw 30 first cam 40 operation piece 43 second cam 45 retaining Part 46 Spring fitting concave part 48a Spring locking convex part 48b Spring locking convex part 50 Coil spring (spring)
51 Coil part 52 Leg part 53 Leg part 60 Spring part 70 Spring

Claims (7)

A belt (11) having a number of locking portions (12) formed on the surface;
A front surface plate (21) and a back surface plate (22) which are arranged in parallel apart from each other in the front and back direction, and an upper surface plate (23) connecting the upper end portions of the front surface plate (21) and the back surface plate (22); And a lower surface plate (24) for connecting lower ends of the front surface plate (21) and the back surface plate (22), and the front surface plate (21), the back surface plate (22), and the upper surface plate (23). And an adjuster body (20) in which a belt insertion part (25) through which the belt (11) is inserted by the lower surface plate (24) is formed along the left-right direction;
An operation piece (40) slidably disposed on the belt insertion part (25),
The surface plate (21) has a cantilever-shaped locking piece (28) that forms a slit (27) and has one end in the left-right direction connected to the surface plate (21). ,
The locking piece (28) is a belt adjuster (10) having a locking claw (29) engageable with the locking portion (12) of the belt (11) at a distal end portion.
The operation piece (40) and the locking piece (28) are arranged to face each other in the front-back direction,
The locking piece (28) has a first cam (30) protruding toward the operation piece (40) in the front and back direction ,
The operation piece (40) has a second cam (43) that protrudes toward the locking piece (28) in the front-back direction and contacts the first cam (30),
The first cam (30) is provided at a substantially central portion in the vertical direction on the back surface of the locking piece (28), and is separated from the second cam (43) in the sliding direction of the operation piece (40). And has an inclined surface (30a) in which the protruding amount gradually increases according to
The belt adjuster (10), wherein the second cam (43) is disposed so as to always overlap the locking piece (28) in a sliding direction of the operation piece (40). A spring (50, 70) for urging the operation piece (40) in one of the vertical directions;
The belt adjuster (10) according to claim 1, wherein the operation piece (40) has a spring fitting recess (46) for holding the spring (50, 70).   The spring fitting recess (46) has a pair of spring locking projections (50, 70) for locking one leg (52, 72) and the other leg (53, 73), respectively. The belt adjuster (10) according to claim 2, characterized in that it has 48a, 48b).   The belt adjuster (10) according to claim 2 or 3, wherein the spring (50) is a torsion coil spring.   The belt adjuster (10) according to claim 1, further comprising a spring (70) for urging the operation piece (40) in any one of the vertical directions. The operation piece (40) is inserted into the operation piece insertion hole (26) of the upper surface plate (23) and the lower surface plate (24),
When the operation piece (40) is inserted into the operation piece insertion hole (26), the operation piece (40) is elastically deformed in the left-right direction to reduce the width thereof. The belt adjuster (10) according to any one of claims 1 to 5, further comprising a pair of left and right retaining portions (45) that abut on (23a).   The belt adjuster according to claim 1 or 6, wherein the operation piece (40) integrally includes a spring portion (60) for urging the operation piece (40) in one of the vertical directions. (10).

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