Key clip

Abstract

A key clip, comprising an upper clip plate (1) and a lower clip plate (2), two hinge mechanisms (3) being arranged between one side of the upper clip plate (1) and one side of the lower clip plate (2). Each hinge mechanism (3) comprises an upper connecting rod (301) and a lower connecting rod (302). A hinge is provided between one end of one of the two connecting rods (301, 302) and one end of the other. The one end of one of the two connecting rods and the one end of the other are respectively rotatably connected to the corresponding upper clip plate (1) and lower clip plate (2) and respectively extend into the interior of the corresponding clip plates (1, 2). Sections of the surfaces of the two connecting rods (301, 302) respectively located in the interior of the clip plates (1, 2) each have a torsion spring (304) sleeved thereon. When a key is mounted or removed, it is only necessary to manually pry apart the upper clip plate (1) and the lower clip plate (2), so that a pin (4) of the upper clip plate (1) and a pin cylinder (5) of the lower clip plate (2) are completely opened. A hole of a key bow is sleeved on the pin cylinder (5), and the key is turned so that the key enters the interior of a gap between the upper clip plate (1) and the lower clip plate (2). The torsion springs (304) return to the original positions thereof under the action of the elastic force of the torsion springs, thereby storing the key.

Description

keychain Technical Field

[0001] The invention belongs to the technical field of key chains, and in particular relates to a key chain that is easy to use. Background Art

[0002] When keys are not in use, they are stored in bags or pockets. The sharp parts of the keys may damage the bags or pockets. This is why key handles were invented. When keys are not in use, they can be stored in the key handles. Storing the key handles in bags or pockets can prevent the keys from scratching the bags or pockets.

[0003] A movable riveted structure is often used between the key and the key handle, so that the key can be rotated and stored in the key handle. However, the movable riveted structure makes it difficult to install and remove the key and the key handle.

[0004] Therefore, it is necessary to design a key chain that is easy to use to solve the above problems. Summary of the Invention

[0005] In response to the above problems, the present invention provides a key chain. By utilizing a hinge mechanism, when installing and removing the key, the hole in the key head is placed into the surface of the pin barrel, and the torsion spring returns to its original position under the action of its own elastic force. The key is rotated to make the key enter the gap between the upper buckle plate and the lower buckle plate, completing the installation of the key. It is simple and convenient, and can solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A key chain is provided, which includes an upper buckle plate and a lower buckle plate, and at least one hinge mechanism is arranged between the upper buckle plate and the lower buckle plate; the at least one hinge mechanism includes an upper connecting rod and a lower connecting rod, one end of the upper connecting rod is rotatably connected to one end of the lower connecting rod, and the other end of the upper connecting rod and the other end of the lower connecting rod are respectively rotatably connected to the corresponding upper buckle plate and the lower buckle plate, and extend into the corresponding upper buckle plate and the lower buckle plate respectively, and the other ends of the upper connecting rod and the lower connecting rod are both sleeved with torsion springs, and the upper buckle plate and the lower buckle plate are provided with accommodating grooves for accommodating the torsion springs; a latch or a pin barrel is provided on the upper buckle plate, and a pin barrel that cooperates with the latch on the upper buckle plate or a latch that cooperates with the pin barrel on the upper buckle plate is provided on the lower buckle plate, and the latch and the pin barrel are movably plugged in to position or remove the key.

[0007] As a further improvement of the present technical solution, the hinge mechanism is arranged between the upper gusset plate and the lower gusset plate and is located on the opposite side or the same side of the upper gusset plate and the lower gusset plate.

[0008] As a further improvement of the present technical solution, the upper gusset plate and the lower gusset plate are provided with a notch groove for accommodating one end of the upper connecting rod and the lower connecting rod on one side where the at least one hinge mechanism is installed.

[0009] As a further improvement of the present technical solution, the ends of the upper connecting rod and the lower connecting rod that are sleeved with the torsion spring are provided with mounting slots, one end of the torsion spring is engaged with the inside of the mounting slot, and the other end is arranged to abut against the inner wall of the accommodating groove.

[0010] As a further improvement of the present technical solution, the upper buckle plate or the lower buckle plate is provided with an elastic abutting mechanism for abutting against the key, and the elastic abutting mechanism includes an elastic member and an abutting member connected to the elastic member.

[0011] As a further improvement of the technical solution, it also includes a stud that cooperates with the pin barrel. The stud is inserted into the pin barrel and cooperates with the thread provided in the pin barrel and extends from the other end of the pin barrel to increase the length of the pin barrel.

[0012] As a further improvement of the present technical solution, the upper buckle plate includes an upper cover plate and an upper connecting plate connected to the upper cover plate; the lower buckle plate includes a lower cover plate and a lower connecting plate connected to the lower cover plate.

[0013] As a further improvement of the technical solution, a positioning clip for fixing the key chain is also included.

[0014] As a further improvement of the present technical solution, one end of the key chain is further provided with a hanging buckle for conveniently hanging the key chain.

[0015] As a further improvement of the present technical solution, one end of the upper connecting rod is rotatably connected to one end of the lower connecting rod via a rotating shaft.

[0016] The present invention provides another technical solution as follows: a key chain is provided, which includes an upper buckle plate and a lower buckle plate, and at least one hinge mechanism is provided between the upper buckle plate and the lower buckle plate; the at least one hinge mechanism includes an upper connecting rod and a lower connecting rod, one end of the upper connecting rod is rotatably connected to one end of the lower connecting rod, the upper connecting rod and the lower connecting rod rotate and open to push the upper buckle plate and the lower buckle plate to move backwards, and the accommodating space generated between the upper buckle plate and the lower buckle plate is used to accommodate the key, the lower buckle plate is provided with a pin barrel that cooperates with the latch on the upper buckle plate or a latch that cooperates with the pin barrel on the upper buckle plate, and the latch and the pin barrel are movably plugged in to position or remove the key; during the rotation and opening of the upper connecting rod and the lower connecting rod, the elastic element on the key chain generates an elastic restoring force to cause the upper connecting rod and the lower connecting rod to rotate and return to their original position.

[0017] As a further improvement of this other technical solution, the elastic element is a torsion spring, which is sleeved on one end of the upper connecting rod and the lower connecting rod, and a receiving groove for receiving the torsion spring is provided inside the upper buckle plate and the lower buckle plate.

[0018] As a further improvement of this other technical solution, the ends of the upper connecting rod and the lower connecting rod that are sleeved with the torsion spring are provided with mounting slots, one end of the torsion spring is engaged with the inside of the mounting slot, and the other end is arranged to abut against the inner wall of the accommodating groove.

[0019] As a further improvement of another technical solution of the present invention, the upper buckle plate or the lower buckle plate is provided with an elastic abutting mechanism for abutting against the key, and the elastic abutting mechanism includes an elastic member and an abutting member connected to the elastic member.

[0020] As a further improvement of this other technical solution, it also includes a stud that cooperates with the pin barrel. The stud is rotated and inserted into the pin barrel and cooperates with the thread provided in the pin barrel and extends from the other end of the pin barrel to increase the length of the pin barrel.

[0021] As a further improvement of this other technical solution, the upper buckle plate includes an upper cover plate and an upper connecting plate connected to the upper cover plate; the lower buckle plate includes a lower cover plate and a lower connecting plate connected to the lower cover plate.

[0022] As a further improvement of another technical solution of this invention, a positioning clip for fixing the key chain is also included.

[0023] As a further improvement of another technical solution of this invention, the at least one hinge mechanism is two hinge mechanisms arranged on the same side or opposite sides.

[0024] The technical effects and advantages of the present invention are as follows: 1. The present invention utilizes a hinge mechanism. When installing and removing the key, you only need to manually pry the upper buckle plate and the lower buckle plate to fully open the latch and the pin barrel, put the hole in the key head into the outer surface of the pin barrel, and the torsion spring returns to its original position under the action of its own elastic force. Turn the key to make the key enter the gap between the upper buckle plate and the lower buckle plate, thereby realizing the folding of the key, which is simple and convenient.

[0025] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] FIG1 shows a schematic diagram of the overall structure of a first embodiment of the present invention;

[0028] FIG2 shows a partial schematic diagram of the overall structure of the first embodiment of the present invention;

[0029] FIG3 shows an exploded view of the overall structure of the first embodiment of the present invention;

[0030] FIG4 shows a schematic diagram of a hinge mechanism according to a first embodiment of the present invention;

[0031] FIG5 shows an exploded view of the hinge mechanism according to the first embodiment of the present invention;

[0032] FIG6 shows an exploded view of the overall structure of the second embodiment of the present invention;

[0033] FIG7 shows an enlarged view of the hinge structure of the second embodiment of the present invention;

[0034] FIG8 shows an open view of the keychain according to the second embodiment of the present invention;

[0035] FIG9 shows a perspective view of a keychain according to a second embodiment of the present invention;

[0036] FIG10 shows another perspective view of the keychain according to the second embodiment of the present invention;

[0037] FIG11 shows a perspective view of the keychain according to the second embodiment of the present invention when in use;

[0038] FIG12 shows a perspective view of a keychain according to a second embodiment of the present invention with multiple keys loaded therein;

[0039] FIG13 shows a perspective view of the key fob of the second embodiment of the present invention when removing the key;

[0040] FIG14 shows a perspective view of a keychain equipped with a hanging buckle according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0042] A first embodiment of the present invention provides a key chain, as shown in FIG1-5 , which includes an upper plate 1 and a lower plate 2 , and two hinge mechanisms 3 are provided between one side of the upper plate 1 and the lower plate 2 .

[0043] The hinge mechanism 3 includes an upper connecting rod 301 and a lower connecting rod 302. The bottom end of the upper connecting rod 301 is flat and has a hinge hole 303. The end of the lower connecting rod 302 close to the upper connecting rod 301 is open, and hinge protrusions 307 are fixedly provided on the inner walls on both sides. The two hinge protrusions 307 are rotatably connected to the hinge holes 303, and the distance between the two hinge protrusions 307 is greater than the depth of the hinge holes 303. When the upper connecting rod 301 and the lower connecting rod 302 rotate, the hinge hole 303 at the bottom of the upper connecting rod 301 rotates on the surface of the two hinge protrusions 307 of the lower connecting rod 302 to form a hinge effect. One end of the upper connecting rod 301 and one end of the lower connecting rod 302 are respectively The upper and lower connecting rods 301 and 302 are respectively located on the inner surface of the upper and lower connecting rods 1 and 2 and are sleeved with torsion springs 304. The upper and lower connecting rods 301 and 302 are respectively provided with accommodating grooves 305 for accommodating the torsion springs 304. The ends of the upper and lower connecting rods 301 and 302 that are sleeved with the torsion springs 304 are provided with mounting grooves 308. One end of the torsion spring 304 is clamped with the inside of the mounting groove 308, and the other end is in contact with the inner wall of the accommodating groove 305. When the torsion spring 304 is installed, one end thereof is inserted into the inside of the mounting groove 308 to limit the position of one end thereof, and the other end is in contact with the inside of the accommodating groove 305 to bear force.

[0044] As shown in Figures 1-3, a latch 4 is fixedly connected to the bottom of one end of the upper buckle plate 1, and a pin barrel 5 matching the latch 4 is fixedly connected to the top of one end of the lower buckle plate 2. The latch 4 and the pin barrel 5 are movably plugged into each other. The hinge mechanism 3 is opened to fully open the latch 4 and the pin barrel 5, and then the hole in the key head is placed in the outer surface of the pin barrel 5, so that the pin barrel 5 is inserted into the hole in the key head to position the key.

[0045] Manually bend the upper buckle plate 1 and the lower buckle plate 2 to open the upper connecting rod 301 and the lower connecting rod 302 of the hinge mechanism 3, and rotate the upper connecting rod 301 and the lower connecting rod 302. The upper connecting rod 301 and the lower connecting rod 302 open and change the angle between the upper connecting rod 301 and the lower connecting rod 302, and elastically compress the torsion spring 304 at the end of the upper connecting rod 301 and the lower connecting rod 302. Then release the upper buckle plate 1 and the lower buckle plate 2, and the torsion spring 304 returns to its original position under the action of its own elastic restoring force, thereby restoring the hinge mechanism 3 to its initial state. The latch 4 is inserted into the pin barrel 5 to realize the closure of the key, which is simple and convenient.

[0046] As shown in Figures 1 and 2, a hanging buckle 6 is provided at the other end of the lower buckle plate 2. The hanging buckle 6 is semicircular and has a notch on one side. It is movably connected to both sides of the lower buckle plate 2. By providing the hanging buckle 6, the key chain is easy to carry.

[0047] As shown in Figures 1-3, the upper clasp plate 1 and the lower clasp plate 2 are located on one side of the hinge mechanism 3 for installing a notch groove 306 that matches the middle part of the upper connecting rod 301 and the lower connecting rod 302. The two notches 306 at the same position of the upper clasp plate 1 and the lower clasp plate 2 accommodate one end of the upper connecting rod 301 and the lower connecting rod 302. When the hinge mechanism 3 is in use, it is convenient for one end of the upper connecting rod 301 and the lower connecting rod 302 to rotate in the notch groove 306, and when the upper clasp plate 1 and the lower clasp plate 2 are combined, one end of the upper connecting rod 301 and the lower connecting rod 302 can be in the two notches 306 to prevent it from protruding outward and avoid interference with external objects.

[0048] As shown in FIG. 1-3 , there is a gap between the upper buckle plate 1 and the lower buckle plate 2 , and the distance of the gap is greater than or equal to the thickness of multiple keys, which is conducive to installing multiple keys.

[0049] The working principle of the first embodiment of the present invention is as follows:

[0050] 1-5, when the key chain is used, the upper and lower plates 1 and 2 are manually pried open to make the upper connecting rod 301 and the lower connecting rod 302 of the hinge mechanism 3 rotate relative to each other, and the upper and lower connecting rods 301 and 302 are opened and the angle between the upper and lower connecting rods 301 and 302 is changed, and the torsion springs 304 at the ends of the upper and lower connecting rods 301 and 302 are compressed and elastically deformed until the latch 4 and the pin barrel 5 are fully opened, and then the hole (not shown) of the key head is placed into the outer surface of the pin barrel 5, so that the pin barrel 5 is inserted into the hole of the key head, and then the upper and lower plates 1 and 2 are released, and the torsion spring 304 returns to its original position under the action of its own elastic force, thereby restoring the hinge mechanism 3 to its initial state, and the latch 4 is inserted into the pin barrel 5, and the key is set between the upper and lower plates 1 and 2, and then the key is rotated to make the key enter the gap between the upper and lower plates 1 and 2, thereby realizing the folding of the key.

[0051] As an improvement to the technical solution of the present application, a hinge mechanism 3 is provided in the middle position of one side of the upper buckle plate 1 and the lower buckle plate 2, or a hinge mechanism 3 is provided on each opposite side. However, the position of the hinge mechanism 3 provided on the other side is based on the premise of not interfering with the folding of the key.

[0052] As an improvement to the technical solution of the present application, the hinge of the upper connecting rod 301 and the lower connecting rod 302 is achieved by a rotating shaft passing through a hinge hole provided at one end of the upper connecting rod 301 and the lower connecting rod 302. Of course, other structures can also be used to achieve the hinge.

[0053] As an improvement of the technical solution of the present application, the torsion spring 304 can be other elastic elements, such as a tension spring, an elastic band, etc. When the user stops manually prying the upper buckle plate 1 and the lower buckle plate 2 and releases the upper buckle plate 1 and the lower buckle plate 2, as long as an elastic mechanism or elastic element is used to realize that the upper connecting rod 301 and the lower connecting rod 302 automatically return to their initial positions, it is within the scope of protection of the present invention.

[0054] The second embodiment of the present invention provides a key chain 100a, as shown in Figure 6-14, which includes an upper buckle plate 1a and a lower buckle plate 2a, and a hinge mechanism 3a is provided on both sides between the upper buckle plate 1a and the lower buckle plate 2a. Similar to the first embodiment of the present invention, the upper buckle plate 1a includes an upper cover plate 11a and an upper mounting plate 13a, and the lower buckle plate 2a includes a lower cover plate 21a and a lower mounting plate 23a. A fixing block 26a fixed to the lower cover plate 21a is provided on the outer side of the lower cover plate 21a, and a positioning clamp 28a is also installed on the fixing block 26a. The positioning clamp 28a and the fixing block 26a are fixed to the lower cover plate 21a and the lower mounting plate 23a by two screws.

[0055] The hinge mechanism of the second embodiment of the present invention is substantially the same as the hinge mechanism of the first embodiment. The hinge mechanism 3a includes an upper connecting rod 31a and a lower connecting rod 32a. One end of the upper connecting rod 31a is hingedly connected to one end of the lower connecting rod 32a, so that the upper connecting rod 31a and the lower connecting rod 32a can rotate relative to each other. In addition, the other ends of the upper connecting rod 31a and the lower connecting rod 32a are respectively rotatably connected to the corresponding upper gusset plate 1a and lower gusset plate 2a, and extend into the interior of the corresponding upper gusset plate 1a and lower gusset plate 2a, respectively. That is, the other end of the upper connecting rod 31a extends and is disposed between the upper cover plate 11a and the upper mounting plate 13a; the other end of the lower connecting rod 32a extends and is disposed between the lower cover plate 21a and the lower mounting plate 23a.

[0056] The upper connecting rod 31a and the lower connecting rod 32a are located on a section of the interior of the upper gusset plate 1a and the lower gusset plate 2a, respectively, and each is sleeved with at least one torsion spring 34a (elastic element). In the second embodiment, two torsion springs 34a are sleeved. Receiving slots 35a for the torsion springs 34a are defined within the upper gusset plate 1a and the lower gusset plate 2a. The ends of the upper connecting rod 31a and the lower connecting rod 32a that receive the torsion springs 34a are each sleeved with mounting slots 38a. One end of the torsion spring 34a is engaged with the interior of the mounting slot 38a, while the other end contacts the inner wall of the receiving slot 35a. During installation, the torsion spring 34a is inserted into the mounting slot 38a to restrict the position of one end, while the other end contacts the interior of the receiving slot 35a to receive force.

[0057] As shown in Figure 6-11, the upper buckle plate 1a is fixedly connected to the pin barrel 4a, and the lower buckle plate 2a is fixedly connected to the latch 5a that matches the pin barrel 4a. The pin barrel 4a and the latch 5a are movably plugged into each other (the diameter of the pin barrel 4a is larger than the diameter of the latch 5a). Open the hinge mechanism 3 to fully open the latch 4a and the pin barrel 5a, and then put the hole (not shown) in the head of the key 7a on the outer surface of the pin barrel 4a, so that the pin barrel 4a is inserted into the hole in the head of the key 7a to position the key 7a.

[0058] Manually bend the upper buckle plate 1a and the lower buckle plate 2a to open the upper connecting rod 31a and the lower connecting rod 32a of the hinge mechanism 3a, and rotate the upper connecting rod 31a and the lower connecting rod 32a relative to each other. The upper connecting rod 31a and the lower connecting rod 32a open and change the angle between the upper connecting rod 31a and the lower connecting rod 32a, and elastically compress the torsion spring 34a installed at the end of the upper connecting rod 31a and the lower connecting rod 32a. Then release the upper buckle plate 1a and the lower buckle plate 2a, and the torsion spring 34a returns to its original position under the action of its own elastic restoring force, thereby restoring the hinge mechanism 3a to its initial state, and the pin 4a is inserted into the pin tube 5a to realize the storage and folding of the key 7a, which is simple and convenient.

[0059] As shown in Figure 6-14, the upper clasp plate 1a and the lower clasp plate 2a are located on one side of the installed hinge mechanism 3a, and a notch groove 36a is provided that matches the middle part of the upper connecting rod 31a and the lower connecting rod 32a. The two notches 36a at the same position of the upper clasp plate 1a and the lower clasp plate 2a accommodate one end of the upper connecting rod 31a and the lower connecting rod 32a. When the hinge mechanism 3 is in use, it is convenient to make one end of the upper connecting rod 31a and the lower connecting rod 32a rotate in the notch groove 36a, and when the upper clasp plate 1a and the lower clasp plate 2a are combined, one end of the upper connecting rod 31a and the lower connecting rod 32a can be in the two notches 36a to prevent it from protruding outward and avoid interference with external objects.

[0060] As shown in Figures 6 to 8, the lower clasp plate 2a is also equipped with a pair of springs 72a (elastic members) and a pair of abutting members 74a connected to the corresponding springs 72a for abutting against the keys 7a. The springs 72a and abutting members 74a cooperate to elastically abut and position multiple keys 7a. Specifically, the springs 72a and abutting members 74a are mounted between the lower cover plate 21a and the lower mounting plate 23a. When not under pressure, the abutting members 74a protrude above the plane of the lower mounting plate 23a. When under pressure, the abutting members 74a compress the springs 72a, causing them to sink below the plane of the lower mounting plate 23a. It is understood that the springs 72a and abutting members 74a can also be located on the upper clasp plate 1a. In short, either the upper or lower clasp plate can be equipped with this elastic abutting mechanism for abutting against keys.

[0061] As shown in Figure 11, after multiple keys are installed, if the distance between the pin barrel 4a and the latch 5a is too large, the key in the middle may not fit on the pin barrel 4a or the latch 5a. In this case, the stud 80a can be used to increase the length of the pin barrel 4a. Specifically, the stud 80a is inserted into the pin barrel 4a, engages with the threads therein, and extends from the other end of the pin barrel 4a. This increases the length of the pin barrel 4a, thereby ensuring that all keys fit on the pin barrel and the latch 5a and do not fall off.

[0062] As shown in Figure 14, the other end of the keychain 100a is fixedly provided with a hanging buckle 8a, and the shape of the hanging buckle 8a is square, semicircular or oval, etc. By providing the hanging buckle 8a, it is convenient to hang the keychain 100a on the inside of a belt or a backpack for easy carrying.

[0063] The working principle of the second embodiment of the present invention is as follows: with reference to Figures 6-14, when using the keychain 100a, the upper clasp 1a and the lower clasp 2a are manually pried to rotate the upper connecting rod 31a and the lower connecting rod 32a of the hinge mechanism 3a relative to each other, the upper connecting rod 31a and the lower connecting rod 32a are opened and the angle between the upper connecting rod 31a and the lower connecting rod 32a is changed, and the torsion spring 34a at the end of the upper connecting rod 31a and the lower connecting rod 32a is compressed and elastically deformed until the latch 5a and the pin barrel 4a are fully opened, and then The hole (not shown) in the head of the key 7a is sleeved on the outer surface of the pin barrel 4a, so that the pin barrel 4a is inserted into the hole in the key head, and then the upper buckle plate 1a and the lower buckle plate 2a are released. The torsion spring 34a returns to its original position under the action of its own elastic force, thereby restoring the hinge mechanism 3 to its initial state. The pin 5a is inserted into the interior of the pin barrel 4a, and the key 7a is set between the upper buckle plate 1a and the lower buckle plate 2a. Then, the key 7a is rotated to make the key 7a enter the gap between the upper buckle plate 1a and the lower buckle plate 2a, thereby realizing the retraction of the key 7a.

[0064] As an improvement to the technical solution of the present application, the upper connecting rod 31a and the lower connecting rod 32a are hingedly connected by a rotating shaft passing through hinge holes provided at one end of the upper connecting rod 31a and the lower connecting rod 32a. Of course, other structures can also be used to achieve the hinge. As long as the upper connecting rod 31a and the lower connecting rod 32a can be hingedly moved, it is within the scope of protection of the present invention.

[0065] As an improvement of the technical solution of the present application, the torsion spring 34a is replaced by other elastic elements, such as a tension spring, an elastic band, etc. When the user stops manually bending the upper buckle plate 1a and the lower buckle plate 2a and releases the upper buckle plate 1a and the lower buckle plate 2a, as long as an elastic mechanism or elastic element is used to realize the upper connecting rod 31a and the lower connecting rod 32a automatically returning to their initial positions, it is within the scope of protection of the present invention.

[0066] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A key chain, comprising an upper buckle plate and a lower buckle plate, characterized in that: At least one hinge mechanism is arranged between the upper buckle plate and the lower buckle plate; the at least one hinge mechanism includes an upper connecting rod and a lower connecting rod, one end of the upper connecting rod is rotatably connected to one end of the lower connecting rod, the other end of the upper connecting rod and the other end of the lower connecting rod are respectively rotatably connected to the corresponding upper buckle plate and the lower buckle plate, and extend to the corresponding upper buckle plate and the lower buckle plate respectively, the other ends of the upper connecting rod and the lower connecting rod are both sleeved with torsion springs, and the upper buckle plate and the lower buckle plate are provided with accommodating grooves for accommodating the torsion springs; a latch or a pin barrel is provided on the upper buckle plate, and a pin barrel cooperating with the latch on the upper buckle plate or a latch cooperating with the pin barrel on the upper buckle plate is provided on the lower buckle plate, and the latch and the pin barrel are movably plugged together to position or remove the key.

2. The keychain according to claim 1, characterized in that: The hinge mechanism is arranged between the upper buckle plate and the lower buckle plate and is located on the opposite side or the same side of the upper buckle plate and the lower buckle plate.

3. The keychain according to claim 1, characterized in that: The upper buckle plate and the lower buckle plate are located on one side where the at least one hinge mechanism is installed and are provided with notch grooves for accommodating one end of the upper connecting rod and the lower connecting rod.

4. The keychain according to claim 1, characterized in that: The ends of the upper connecting rod and the lower connecting rod sleeved with the torsion spring are provided with mounting slots, one end of the torsion spring is clamped with the inside of the mounting slot, and the other end is arranged against the inner wall of the accommodating groove.

5. The keychain according to claim 1, characterized in that: The upper buckle plate or the lower buckle plate is provided with an elastic abutting mechanism for abutting against the key, and the elastic abutting mechanism includes an elastic member and an abutting member connected to the elastic member.

6. The keychain according to claim 1, characterized in that: It also includes a stud that cooperates with the pin barrel. The stud is inserted into the pin barrel and cooperates with a thread provided in the pin barrel and extends from the other end of the pin barrel to increase the length of the pin barrel.

7. The keychain according to claim 1, characterized in that: The upper buckle plate includes an upper cover plate and an upper connecting plate connected to the upper cover plate; the lower buckle plate includes a lower cover plate and a lower connecting plate connected to the lower cover plate.

8. The keychain according to claim 1, characterized in that: Also included is a positioning clip for fixing the key chain.

9. The keychain according to claim 1, characterized in that: One end of the key chain is also provided with a hanging buckle for conveniently hanging the key chain.

10. The keychain according to claim 1, characterized in that: One end of the upper connecting rod is rotatably connected to one end of the lower connecting rod via a rotating shaft.

11. A key chain, comprising an upper buckle plate and a lower buckle plate, characterized in that: At least one hinge mechanism is arranged between the upper buckle plate and the lower buckle plate; the at least one hinge mechanism includes an upper connecting rod and a lower connecting rod, one end of the upper connecting rod is rotatably connected to one end of the lower connecting rod, the upper connecting rod and the lower connecting rod are rotated and opened to push the upper buckle plate and the lower buckle plate to move backwards, and the accommodating space generated between the upper buckle plate and the lower buckle plate is used to accommodate the key, and the lower buckle plate is provided with a pin barrel that cooperates with the latch on the upper buckle plate or a latch that cooperates with the pin barrel on the upper buckle plate, and the latch and the pin barrel are movably plugged together to position or remove the key; during the rotation and opening process of the upper connecting rod and the lower connecting rod, the elastic element on the key chain generates an elastic restoring force to make the upper connecting rod and the lower connecting rod rotate and return to their original position.

12. The keychain according to claim 11, characterized in that: The elastic element is a torsion spring, which is sleeved on one end of the upper connecting rod and the lower connecting rod, and a receiving groove for receiving the torsion spring is provided inside the upper buckle plate and the lower buckle plate.

13. The keychain according to claim 12, characterized in that: The ends of the upper connecting rod and the lower connecting rod sleeved with the torsion spring are provided with mounting slots, one end of the torsion spring is clamped with the inside of the mounting slot, and the other end is arranged against the inner wall of the accommodating groove.

14. The keychain according to claim 11, characterized in that: The upper buckle plate or the lower buckle plate is provided with an elastic abutting mechanism for abutting against the key, and the elastic abutting mechanism includes an elastic member and an abutting member connected to the elastic member.

15. The keychain according to claim 11, characterized in that: It also includes a stud that cooperates with the pin barrel. The stud is rotatably inserted into the pin barrel, cooperates with a thread provided in the pin barrel, and extends from the other end of the pin barrel to increase the length of the pin barrel.

16. The keychain according to claim 11, characterized in that: The upper buckle plate includes an upper cover plate and an upper connecting plate connected to the upper cover plate; the lower buckle plate includes a lower cover plate and a lower connecting plate connected to the lower cover plate.

17. The keychain according to claim 11, characterized in that: Also included is a positioning clip for fixing the key chain.

18. The keychain according to claim 11, characterized in that: The at least one hinge mechanism is two hinge mechanisms arranged on the same side or on opposite sides.

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