Fastener

Abstract

To provide a fastener in which a hooking object is hardly detached even when an external force is applied.SOLUTION: In a fastener, a left hook body 21 and a right hook body are overlapped and pivotally supported in a part between a front side plate part having an opening part 6 and a rear side plate part 7, energization is performed by a spring member 60 in a direction of closing the opening part 6, a left hook part 24 is opened when a left finger hook part 30 of the left hook body is pressed, a right hook part is opened when a right finger hook part 50 of the right hook body is pressed, a hooking object can be inserted to the inside of the opening parts 4, 6, and the left hook part 24 and the right hook part are hooked on the hooking object by the spring member 60 when it is released.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a fastener, and more particularly to a fastener suitable for use in fastening and unfastening a pet's collar and lead. [Background technology]

[0002] When taking a pet dog for a walk, a fastener attached to the end of the lead is attached detachably to a ring on the collar. Conventionally, a type of fastener called a snap hook has been commonly used. This snap hook has a movable piece that opens and closes the opening and is biased in the closing direction by a spring. While out on a walk, a dog may suddenly start running, exerting a large external force on the snap hook. However, the snap hook type has the drawback that when an external force is applied to the movable part, it opens, making it easy for the hooked object to come off. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention has been made in consideration of the above-mentioned problems of the prior art, and has as its object to provide a fastener that is difficult for an object to be fastened to come off even when an external force is applied. [Means for solving the problem]

[0004] In the invention described in claim 1, a support body including a U-shaped front plate portion having an opening that opens upward and a U-shaped rear plate portion having an opening that opens upward, which are integrated with a space therebetween; a drawstring attachment member coupled to the support; a pair of left and right hook bodies, one of which is stacked front to back in the space between the front plate portion and the rear plate portion and whose lower portions are pivotally supported by the support; a biasing means interposed between the pair of left and right hook bodies for biasing the left hook body in a clockwise direction and the right hook body in a counterclockwise direction; Equipped with The left hook body has a left finger hook portion protruding outward from the left side of the support body, a left hook portion that closes the front end portions of the openings of the front plate portion and the rear plate portion by rotating clockwise and engages with the object to be engaged, and that opens the front end portions of the openings by rotating counterclockwise and releases the engagement with the object to be engaged; The right hook body has a right finger hook portion protruding from the right outer side of the support body, a right hook portion that, when rotated counterclockwise, closes the front ends of the openings of the front plate portion and the rear plate portion, and engages with the object to be engaged, and that, when rotated clockwise, opens the front ends of the openings, and releases the engagement with the object to be engaged; By rotating the left hook body counterclockwise and the right hook body clockwise, the interior of the openings in the front plate part and the rear plate part communicate with the space above and outside, so that an object to be engaged can be inserted and removed from the openings from above. It is characterized by: In the invention described in claim 2, an engaging portion and an engaging receiving portion are provided on the left hook body and the support body, which engage with each other when the left hook portion rotates counterclockwise until it opens the front ends of the openings in the front plate portion and the rear plate portion, thereby holding the left hook body in the engaged position; The right hook body and the support body are provided with an engaging portion and an engaging receiving portion that engage with each other when the right hook portion rotates clockwise until the front and rear plate portions open near the tip ends of the openings, thereby holding the right hook body in the engaged position. It is characterized by: In the invention described in claim 3, The left hook body includes a left abutment portion exposed inside the opening, closer to the axis than the left hook portion that opens the openings of the front plate portion and the rear plate portion near the tip thereof by rotating counterclockwise; When the object to be engaged is inserted from above into the openings in the front and rear plates, a clockwise moment is applied to the left hook body. The right hook body includes a right abutment portion exposed inside the opening, closer to the axis than the right hook portion that opens the openings of the front plate portion and the rear plate portion near the tip by rotating clockwise, When an object to be engaged inserted from above into the openings of the front plate portion and the rear plate portion comes into contact with the right abutment portion, a counterclockwise moment is applied to the right hook body. It is characterized by: [Effects of the Invention]

[0005] According to the invention described in claim 1, when the left and right finger hooks are operated against the biasing means and the left hook body is rotated counterclockwise and the right hook body is rotated clockwise, the openings in the front and rear plate portions open toward the tips, allowing the object to be inserted from above into the openings. Then, when the left hook body is rotated clockwise and the right hook body is rotated counterclockwise, the left and right hook portions close the openings in the front and rear plate portions and double-hook the object, making it difficult for the object to come off the fastener even if an external force is applied to it. Furthermore, the biasing means biases the left and right hook portions in the closing direction, which also makes it difficult for the left and right hook portions to open. Furthermore, according to the invention described in claim 2, by rotating the left hook body counterclockwise to engage the left engagement portion with the left engagement receiving portion of the support, and by rotating the right hook body clockwise to engage the right engagement portion with the right engagement receiving portion of the support, even if the left finger loop portion and the right finger loop portion are released, the left hook portion and the right hook portion can be kept in an open state, making it easier to insert the object to be hooked into the opening. According to the invention described in claim 3, when the object to be hooked is inserted into the opening from above, a clockwise moment is applied to the left contact portion of the left hook body, and a counterclockwise moment is applied to the right contact portion of the right hook body, causing the left hook body to rotate clockwise and the right hook body to rotate counterclockwise, thereby automatically closing the left and right hook portions. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is a front view of the appearance of a fastener according to an embodiment of the present invention. [Figure 2] FIG. 2 is a rear view of FIG. [Figure 3] FIG. 2 is a left side view of FIG. [Figure 4] FIG. 2 is a diagram illustrating the configuration of FIG. 1 with the front plate portion omitted. [Figure 5] FIG. 4 is a diagram showing the configuration of FIG. 3 with the left hook body and spring member omitted. [Figure 6] FIG. 4 is a front view of the spring member in FIG. 3. [Figure 7] 10A and 10B are explanatory diagrams illustrating the operation of the fastener. [Figure 8] 10A and 10B are explanatory diagrams illustrating the operation of the fastener. [Figure 9] 10A and 10B are explanatory diagrams illustrating the operation of the fastener. [Figure 10] 10A and 10B are explanatory diagrams illustrating the operation of the fastener. [Figure 11] FIG. [Figure 12] 10A and 10B are explanatory diagrams illustrating the operation of the fastener. DETAILED DESCRIPTION OF THE INVENTION

[0007] Preferred embodiments of the present invention will now be described with reference to examples. [Example]

[0008] An embodiment of a fastener according to the present invention will be described with reference to Figures 1 to 6. Figure 1 is an external front view of a fastener according to one embodiment of the present invention, Figure 3 is a left side view of Figure 1, Figure 2 is a rear view of Figure 1, Figure 4 is a structural diagram in which the front plate portion of Figure 1 is omitted, Figure 5 is a structural diagram in which the left hook body and spring member of Figure 4 are omitted, and Figure 6 is a front view of the spring member in Figure 4. In these figures, reference numeral 1 denotes a fastener made entirely of metal, which is attached, for example, to the end of a dog's leash 2. This fastener 1 can be detachably hooked onto a metal ring on a collar (not shown). Within fastener 1, reference numeral 3 denotes a support body formed symmetrically on both sides, and is composed of a U-shaped front plate portion 5 having an opening 4 that opens upward and a U-shaped rear plate portion 7 having an opening 6 that opens upward, which are arranged parallel to each other with a space between them and integrated at their lower ends. The front plate portion 5 and the rear plate portion 7 are identical in shape, and support body 3 is formed in a long, narrow U-shape with an upward opening when viewed from the side (see Figure 3). Two pins 8 and 9 are attached symmetrically near the left and right upper ends of support body 3 to secure front plate portion 5 and rear plate portion 7 in parallel. Reference numeral 10 denotes a track-shaped drawstring attachment member rotatably connected to a shaft 11 fixed to the lower end of the support 3.

[0009] In the space between the front plate portion 5 and the rear plate portion 7 of the support body 3, a pair of plate-shaped left hook body 21 and right hook body 41 are provided, stacked one on top of the other in the front and rear, with their lower parts journalled to the support body 3 by shaft 20. Left hook body 21 has a recessed left engagement portion 25 formed on the outer periphery of the tip of left hook portion 24, which is formed by connecting two arc portions 22, 23 to form an L-shape, a left protrusion 26 at the corner of arc portions 22 and 23, and a shaft hole 28 formed in base end 27 of arc portion 22. A shaft 20 fixed to support body 3 is inserted into shaft hole 28, thereby pivotally supporting left hook body 21. A thumb-shaped left abutment portion 29 extends from base end 27 so as to face arc portion 23. Left hook body 21 is formed in an overall Y shape.

[0010] Left abutment portion 29 is provided facing left hook portion 24 closer to the axis than the tip thereof, and when left hook body 21 rotates counterclockwise, it retreats from openings 4 and 6 in front plate portion 5 and rear plate portion 7, and is exposed inside openings 4 and 6 in place of left hook portion 24, which opens the tips of openings 4 and 6. This left abutment portion 29 is designed to apply a clockwise moment to left hook body 21 when an engagement object inserted from above into openings 4 and 6 abuts against it.

[0011] A left finger hook 30 that protrudes outward from the front plate 5 is provided on the outer periphery near the base end 27 of the left hook body 21. A spring hole 31 is formed in the middle of the arc portion 22, and the left end of a spring member (described later) is fitted into this hole. An opening 32 is formed between the left hook 24 and the left abutment 29, through which an object to be hooked can be inserted and removed. Furthermore, when left hook body 21 is rotated clockwise to its maximum position, left protrusion 26 abuts against pin 8, limiting its movement. Conversely, when left hook body 21 is rotated counterclockwise nearly to its maximum position and left engagement portion 25 engages with pin 8, the rotated position of left hook body 21 is maintained at the engagement position (at this time, left hook portion 24 is retracted from openings 4 and 6 in front plate portion 5 and rear plate portion 7).

[0012] The right hook body 41 is formed symmetrically with the left hook body 21. That is, the right hook portion 44 is formed by connecting two arc portions 42, 43 to form an L-shape, and includes a recessed right engagement portion 45 on the outer periphery of the tip of the right hook portion 44, a right protrusion 46 at the corner of the arc portions 42 and 43, and a shaft hole 48 at the base end 47 of the arc portion 42. The shaft 20 is inserted through the shaft hole 48, thereby pivotally supporting the right hook body 41 for free rotation. A thumb-shaped right abutment portion 49 extends from the base end 47 so as to face the arc portion 43. The right hook body 41 is formed in an overall Y-shape.

[0013] The right abutment portion 49 is provided facing the right hook portion 44 and closer to the axis than the tip thereof, and when the right hook body 41 rotates clockwise, it retreats from the openings 4 and 6 of the front plate portion 5 and the rear plate portion 7 and is exposed inside the openings 4 and 6 in place of the left hook portion 44, which opens near the tips of the openings 4 and 6. This right abutment portion 49 is designed to apply a counterclockwise moment to the right hook body 41 when an engagement object inserted from above into the openings 4 and 6 abuts against it.

[0014] A right finger hook 50 that protrudes outward from the rear plate portion 7 is provided on the outer periphery near the base end 47 of the right hook body 41. A spring hole 51 is formed in the middle of the arc portion 42, and the right end of a spring member (described later) is fitted into the spring hole 51. An opening 52 is formed between the right hook 44 and the right abutment 49, through which an object to be hooked can be inserted and removed. Furthermore, when the right hook body 41 is rotated counterclockwise to the maximum position, the right protrusion 46 comes into contact with the pin 9, limiting its movement. Conversely, when the right hook body 41 is rotated clockwise to near the maximum position and the right engagement portion 45 engages with the pin 9, the rotational position of the right hook body 41 is maintained at the engagement position (at this time, the right hook portion 44 is retracted from the openings 4 and 6 of the front plate portion 5 and the rear plate portion 7).

[0015] Reference numeral 60 in Fig. 2 denotes a U-shaped spring member in a front view that serves as a biasing means interposed between left hook body 21 and right hook body 41. This spring member 60 is formed from a single wire material and, as shown in Fig. 6, comprises a left wire portion 61, a right wire portion 62, a left coil portion 63 formed at the lower end of left wire portion 61, a right coil portion 64 formed at the lower end of right wire portion 62, and a linear connecting portion 65 connecting left coil portion 63 and right coil portion 64. The tip of left wire portion 61 is bent into an L-shape and fitted into spring hole 31 of left hook body 21, and the tip of right wire portion 62 is bent into an L-shape and fitted into spring hole 51 of right hook body 41. Spring member 60 biases left hook body 21 in a clockwise direction and right hook body 41 in a counterclockwise direction.

[0016] Next, the operation of the above embodiment will be described with reference to FIGS. As an example, the case will be described where the fastener 1 attached to the end of the dog's leash 2 is detachably hooked onto the ring of the collar (reference numeral 70 in Figure 9). (1) Recovery state Initially, when the left finger hook portion 30 and the right finger hook portion 50 of the fastener 1 are released, the left hook body 21 is biased by the spring member 60 to rotate clockwise, with the left hook portion 24 closing the distal ends of the openings 4 and 6, and the right hook body 41 rotates counterclockwise, with the right hook portion 44 closing the distal ends of the openings 4 and 6, resulting in a restored state. The left abutment portion 26 of the left hook body 21 abuts against the pin 8, limiting its rotation in the clockwise direction, and the right abutment portion 46 of the right hook body 41 abuts against the pin 9, limiting its rotation in the counterclockwise direction. The left finger hook portion 30 protrudes leftward from the support body 3, and the right finger hook portion 50 protrudes rightward from the support body 3 (see FIGS. 1 to 5).

[0017] (2) Opening the opening When openings 4 and 6 are to be opened to the outside, the thumb and index finger are hooked on left and right finger hooks 30 and 50, respectively, and the left and right finger hooks 30 and 50 are pressed counterclockwise and clockwise, respectively, against the spring member 60 (arrows A and B in FIG. 7), and the left hook body 21 is rotated counterclockwise and the right hook body 41 is rotated clockwise (arrows a and b in FIG. 7). This causes the tips of left hook 24 and right hook 44 to retract into support 3, opening the tips of openings 4 and 6. When left hook body 21 is rotated counterclockwise nearly to its maximum extent and the recessed left engagement portion 28 engages with pin 8, the left hook body 21 does not move and stops at the engaged position even if the finger is released from left finger hook 30 (the spring member 60 is assumed to be formed so that the engagement resistance force is greater than the return force). Similarly, when right hook body 41 rotates clockwise nearly to the maximum position and recessed right engagement portion 48 engages with pin 9, even if you remove your finger from right finger hook portion 50 and release it, right hook body 41 will not move and will stop at the engaged position (spring 60 is formed so that the engagement resistance force is greater than the return force). Therefore, the left hook 24 and the right hook 44 keep the tip ends of the openings 4 and 6 open even when the fingers are released from the left finger hook 30 and the right finger hook 50 (see FIGS. 7 and 8).

[0018] (3) Insert the ring attached to the collar and close the opening. Hold fastener 1 in your hand, bring it close to ring 70 of a collar as the object to be hooked, and insert ring 70 into openings 4, 6 (see Figure 9). Then, ring 70 abuts against left abutment portion 29, applying a clockwise moment to left hook body 21, and in parallel, ring 70 abuts against right abutment portion 49, applying a counterclockwise moment to right hook body 41 (see arrows c, d in Figures 10 and 11). As a result, the left engaging portion 28 disengages from pin 8 serving as the left engagement receiver, and the biasing force of spring member 60 causes left hook body 21 to rotate clockwise, causing left hook portion 24 to close the distal ends of openings 4 and 6. The right engaging portion 48 disengages from pin 9 serving as the right engagement receiver, and the biasing force of spring member 60 causes right hook body 41 to rotate counterclockwise, causing right hook portion 44 to close the distal ends of openings 4 and 6. The loops of ring 70 cross the left hook portion 24 and the right hook portion 44, forming a double engagement, thereby closing openings 4 and 6. The left abutting portion 26 of left hook body 21 abuts against pin 8, restricting clockwise rotation, and the right abutting portion 46 of right hook body 41 abuts against pin 9, restricting counterclockwise rotation (see FIGS. 11 and 12).

[0019] (4) Removing the collar ring When it is desired to remove collar ring 70, as in (3) above, place your fingers on left finger loop portion 30 and right finger loop portion 50, press left finger loop portion 30 counterclockwise and right finger loop portion 50 clockwise against spring member 60, rotate left hook body 21 counterclockwise and right hook body 41 clockwise, and open openings 4 and 6.

[0020] According to this embodiment, when the left finger hook portion 30 and the right finger hook portion 50 are operated against the spring 60 and the left hook body 21 is rotated counterclockwise and the right hook body 41 is rotated clockwise, the openings 4 and 6 in the front plate portion 5 and the rear plate portion 6 are opened toward their tips, allowing an object to be hooked, such as a ring 70, to be inserted into the openings 4 and 6 from above. Thereafter, when the left hook body 21 is rotated clockwise and the right hook body 41 is rotated counterclockwise, the openings 4 and 6 are closed by the left hook portion 24 and the right hook portion 44 of the right hook body 41, and the object to be hooked is doubly hooked onto the loop of the ring 70, making it difficult for the object to be hooked to come off the fastener 1 even if an external force is applied to the object to be hooked. Furthermore, the left hook portion 24 and the right hook portion 44 are biased in the closing direction by the spring member 60, which also makes it difficult for the left hook portion 24 and the right hook portion 44 to open. Furthermore, by rotating the left hook body 21 counterclockwise to engage the left engagement portion 28 with pin 8 as the left engagement receiver of the support body 3, and by rotating the right hook body 41 clockwise to engage the right engagement portion 48 with pin 9 as the right engagement receiver of the support body 3, the left hook portion 24 and the right hook portion 44 can be held in an open state even when the left finger hook portion 30 and the right finger hook portion 50 are released. Therefore, the fastener 1 can be held at any position to insert the object to be hooked, making it easy to insert the object to be hooked into the opening. Furthermore, when an object to be hooked is inserted into the openings 4, 6 from above, a clockwise moment is applied to the left abutment portion 29 and a counterclockwise moment is applied to the right abutment portion 49, causing the left hook body 21 to rotate clockwise and the right hook body 41 to rotate counterclockwise, thereby automatically closing the left hook portion 24 and the right hook portion 44. [Industrial Applicability]

[0021] The present invention can be applied to a fastener used when connecting a dog's leash to a collar, for example. [Explanation of symbols]

[0022] 1 Fastener 3 Support 4, 6 Openings 5 Front plate part 7 Rear plate 21 Left hook to the body 24 Left hook 29 Left contact part 30 Left finger rest 41 Right hook to the body 44 Right hook part 49 Right contact part 50 Right finger rest 60 Spring member

Claims

1. a support body including a U-shaped front plate portion having an opening that opens upward and a U-shaped rear plate portion having an opening that opens upward, which are integrated with a space therebetween; a drawstring attachment member coupled to the support; a pair of left and right hook bodies, one of which is stacked front to back in the space between the front plate portion and the rear plate portion and whose lower portions are pivotally supported by the support; a biasing means interposed between the pair of left and right hook bodies for biasing the left hook body in a clockwise direction and the right hook body in a counterclockwise direction; Equipped with The left hook body has a left finger hook portion protruding outward from the left side of the support body, a left hook portion that closes the front end portions of the openings of the front plate portion and the rear plate portion by rotating clockwise and engages with the object to be engaged, and that opens the front end portions of the openings by rotating counterclockwise and releases the engagement with the object to be engaged; The right hook body has a right finger hook portion protruding from the right outer side of the support body, a right hook portion that, when rotated counterclockwise, closes the front ends of the openings of the front plate portion and the rear plate portion, and engages with the object to be engaged, and that, when rotated clockwise, opens the front ends of the openings, and releases the engagement with the object to be engaged; By rotating the left hook body counterclockwise and the right hook body clockwise, the interior of the openings in the front plate part and the rear plate part communicate with the space above and outside, so that an object to be engaged can be inserted and removed from the openings from above. A fastener characterized by:

2. an engaging portion and an engaging receiving portion are provided on the left hook body and the support body, which engage with each other when the left hook portion rotates counterclockwise until it opens the front ends of the openings in the front plate portion and the rear plate portion, thereby holding the left hook body in the engaged position; The right hook body and the support body are provided with an engaging portion and an engaging receiving portion that engage with each other when the right hook portion rotates clockwise until the front and rear plate portions open near the tip ends of the openings, thereby holding the right hook body in the engaged position. The fastener according to claim 1, characterized in that

3. The left hook body includes a left abutment portion exposed inside the opening, closer to the axis than the left hook portion that opens the openings of the front plate portion and the rear plate portion near the tip thereof by rotating counterclockwise; When the object to be engaged is inserted from above into the openings in the front and rear plates, a clockwise moment is applied to the left hook body. The right hook body includes a right abutment portion exposed inside the opening, closer to the axis than the right hook portion that opens the openings of the front plate portion and the rear plate portion near the tip by rotating clockwise, When an object to be engaged inserted from above into the openings of the front plate portion and the rear plate portion comes into contact with the right abutment portion, a counterclockwise moment is applied to the right hook body.

3. The fastener according to claim 1 or 2, characterized in that:

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