A handcuff structure

Abstract

The present invention relates to the field of police equipment. Police or military handcuffs currently equipped in various countries are all manufactured using the principle of one-way self-locking with ratchet-shaped internal teeth. They are very strong and cannot be forcibly pulled apart by human hands or feet. However, their design also has the following shortcomings and loopholes. These defects can be exploited to easily open the handcuffs. To overcome the defects of the above-mentioned technology, a handcuff structure is provided, including a lock shell, a lock cover, a dynamic lock ring and a key. The lock shell is provided with a lock box on one side close to the lock cover. A rotating wheel is provided inside the lock box. A rotating shaft is provided at the axis of the rotating wheel. One end of the rotating shaft extends into a first shaft hole at the bottom of the lock box body, and the other end of the rotating shaft extends into a second shaft hole at the bottom of the lock cover body. The first shaft hole and the second shaft hole are coaxially arranged, which can effectively prevent prisoners from opening the handcuffs by using objects such as wire, needles, and wooden sticks. The locking effect of the handcuffs is improved as a whole, and at the same time, wear is reduced, making the handcuffs more durable and improving safety.

Description

Technical Field

[0001] The present invention relates to the field of police equipment, in particular to a handcuff structure. Background Art

[0002] Currently, police or military handcuffs used in various countries are manufactured using the principle of one-way self-locking with ratchet teeth inside. They are very strong and cannot be opened by force. However, their design also has the following shortcomings and loopholes, which can be exploited to make them easy to open:

[0003] 1. Disadvantages of tooth shape: When this tooth shape is interlocked in the forward and reverse directions, there is a side gap in the semi-engaged state. That is, when the forward outer teeth on the handcuffs movable ring and the reverse elastic reverse teeth inside the handcuffs are engaged, the forward teeth on the movable ring cannot be retracted, and foreign objects cannot be inserted into the teeth to pry the two apart. However, at this time, as long as the outer ring of the handcuffs is gently squeezed to make the four originally meshed teeth out of the semi-engaged state, a tooth side gap will appear between the teeth. At this time, from the outside of the handcuffs, an object such as a thin iron sheet or a thin card is stuffed into the outermost tooth, thereby pressing the elastic reverse tooth inside the first tooth, and the handcuffs can be opened instantly. Because after one of the four meshing teeth is pressed, the remaining teeth will also be disengaged. Even if it is difficult for prisoners to obtain the above tools, they can use readily available paper, mineral water bottles torn into narrow strips, snack packaging bags and other thin items to open the handcuffs. The method is as follows: gently pinch the outer ring of the handcuffs, and stuff the plastic strip or paper strip cut from the mineral water bottle into the gap on the side of the teeth, keep it still, and then gently release the outer ring of the handcuffs to make it re-engage, so that the plastic strip is clamped between the positive and negative teeth, and then pinch the outer ring of the handcuffs to tighten the four positive teeth inward. At this time, the plastic sheet covers the four meshing teeth of the positive and negative teeth, causing the originally meshed positive and negative ratchet teeth to lose their interlocking effect. Gently pull the outer ring of the handcuffs and the handcuffs will be opened.

[0004] 2. The keys of existing handcuffs are universal and relatively simple, and can be easily imitated or replaced by small hooks made of other thin wires or the like. Even if the safety on the handcuffs is on, the above objects can easily open the safety and then unlock the handcuffs by pulling down the spring lever under the reverse teeth.

[0005] 3. The keyhole of the handcuffs is too close to the unlocking lever, and the keyhole is round. This makes it possible for the homemade unlocking tool to open the handcuffs by groping while rotating in the hole.

[0006] Based on the above three points, the safety of existing handcuffs has great hidden dangers, especially for criminals who have a certain understanding of handcuffs. As long as they have the opportunity and skills, they can successfully escape. This will cause great trouble to law enforcement and escort personnel. Therefore, we urgently need to develop a new type of handcuffs with relatively strong safety to overcome the above shortcomings. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned technology and provide a handcuff structure.

[0008] In order to solve the above technical problems, the present invention provides a handcuff structure, comprising a lock shell, a lock cover, a dynamic lock ring and a key, the lock shell is fixedly connected to the first fixed lock ring, the lock cover is fixedly connected to the second fixed lock ring, a hinge shaft is provided between the end of the first fixed lock ring and the end of the second fixed lock ring, the dynamic lock ring is movably hinged to the hinge shaft, the outer side of the dynamic lock ring is evenly provided with semicircular tooth grooves, and the side wall of the lock shell away from the first fixed lock ring is provided with a lock hole, which is characterized in that: a lock box is provided on the lock shell near the lock cover, a rotating wheel is provided inside the lock box, a rotating wheel axis is provided with a rotating shaft, one end of the rotating shaft extends into the first shaft hole at the bottom of the lock box body, and the other end of the rotating shaft extends into the second shaft hole at the bottom of the lock cover body, the first shaft hole and the second shaft hole are coaxially arranged; the outer circumferential surface of the rotating wheel is provided with gear teeth and a slot, and the groove walls on both sides of the slot are respectively provided with a platform and an inclined platform; the lock shell The lock body is fixed with a first locking groove on one side of the lock body, and a lock body is provided in the interior of the lock body that can slide axially along the first locking groove, and a first spring is provided between the bottom of the lock body and the bottom of the first locking groove, and a connecting groove is provided between the first locking groove and the lock box; the lock body is provided with multiple sets of lock cylinders on one side of the lock body near the dynamic locking ring, and a connecting rod is fixed on the other side of the lock body, and the connecting rod rod body extends into the inside of the card slot through the connecting groove; the lock cylinder is provided with a second locking groove on one side of the lock cylinder facing the first fixed locking ring, and the semicircular tooth groove can pass through between the groove walls on both sides of the second locking groove, and the groove wall of the second lock groove of the lock cylinder cylinder is close to the first spring side and the angle between the lock cylinder axis is acute, and the groove wall on the other side of the second lock groove is perpendicular to the lock cylinder axis, and the distance between the groove walls on both sides of the second lock groove is greater than the thickness of the dynamic locking ring; the bottom end of the key is provided with a key shaft and a driving gear, and the driving gear can be meshed with the gear teeth on the outer peripheral surface of the rotating wheel.

[0009] As an improvement, the lock shell and the lock cover are fixedly connected by rivets; a third axial hole is provided at the bottom of the lock box near the teeth of the rotating wheel, and the key shaft at the bottom of the key can be inserted into the third axial hole.

[0010] As an improvement, the lock cover body is provided with a positioning hole coaxial with the third axial hole, and the lock cover body between the positioning hole and the lock hole is provided with a guide groove, and the guide groove is arranged in an L shape.

[0011] As an improvement, baffles are provided on both sides of the guide groove inside the lock box.

[0012] As an improvement, the width of the guide groove is greater than the diameter of the key shaft, and the diameter of the key body is smaller than the diameter of the positioning hole.

[0013] As an improvement, a pin hole is provided on the side of the rotating wheel body facing the lock cover, a limit pin is provided inside the pin hole, a second spring is provided between the limit pin and the bottom of the pin hole, the top of the limit pin is set to a hemispherical structure, and the lock cover is located above the rotating wheel and has an arc-shaped groove on the cover body. The center of the bottom of the arc-shaped groove and the end of the bottom of the groove close to the inclined platform are both provided with limit pits for use with the limit pin.

[0014] As an improvement, the upper surface of the platform is lower than the bottom position of the outer peripheral surface of the connecting rod, the inclined surface of the inclined platform faces downward, and the highest point of the inclined surface of the inclined platform is higher than the top position of the outer peripheral surface of the connecting rod.

[0015] As an improvement, a connecting buckle for connecting a chain is installed on the side of the lock shell away from the first fixed locking ring.

[0016] Beneficial effects of the present invention:

[0017] 1. It can effectively prevent prisoners from opening handcuffs by using objects such as wire, needles, and sticks, thus preventing them from escaping. It can also improve the locking effect of handcuffs as a whole, reduce wear and tear, make them more durable, and improve safety.

[0018] 2. While ensuring proper meshing between the teeth on the rotating wheel and the gear on the key, different handcuffs have gears with different numbers of teeth, modules, tooth directions, tooth shapes, and tooth spacing between the two gears. After arranging and combining them and installing them separately, each pair of handcuffs can be opened only with the matching key. This greatly improves the safety of the handcuffs.

[0019] 3. The meshing of the semicircular teeth can effectively prevent the handcuffs from opening after the insertion of foreign objects, and because the obstacles embedded in the semicircle are larger in size, the strength is much higher than that of handcuffs with positive and negative ratchet structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the external structure of handcuffs;

[0021] Figure 2 is a schematic diagram of the handcuffs in the open state;

[0022] Figure 3 is a schematic diagram of the internal structure of handcuffs;

[0023] Figure 4 is a first-person perspective diagram of the explosion of handcuffs;

[0024] Figure 5 is a schematic diagram of the explosion of handcuffs from the second perspective;

[0025] Figure 6 is a schematic diagram of the lock cover structure;

[0026] Figure 7 is a schematic diagram of the lock housing structure;

[0027] Figure 8 is a schematic diagram of a partial installation of the lock body;

[0028] Figure 9 is a schematic diagram of the connection between the rotating wheel and the lock body;

[0029] Figure 10 is a schematic front view of the rotating wheel;

[0030] Figure 11 is a partially enlarged schematic diagram of the arc groove.

[0031] As shown in the figure: 1. Lock housing, 101. First fixed locking ring, 102. Lock box, 103. First shaft hole, 104. Connecting groove, 105. Lock hole, 106. Third shaft hole, 107. First lock groove, 2. Lock cover, 201. Second fixed locking ring, 202. Guide groove, 203. Positioning hole, 204. Arc groove, 205. Second shaft hole, 206. Limiting pit, 207. Second lock groove, 3. Dynamic locking ring, 301. Semicircular tooth groove, 4. Rotating wheel, 401. Rotating shaft, 402. Gear teeth, 403. Pin hole, 404. Slot, 405. Platform, 406. Inclined platform, 5. Key, 501. Key shaft, 502. Drive gear, 6. Lock body, 601. Lock cylinder, 602 , connecting rod, 603, second locking slot, 7, baffle, 8, connecting buckle, 9, rivet, 10, limit pin, 11, second spring, 12, hinge shaft, 13, first spring. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] In the description of the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, which indicate orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are used solely to facilitate description and simplify the present invention, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, the use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that the component must be absolutely horizontal or overhanging; rather, a slight tilt is permitted. For example, "horizontal" simply refers to a direction that is more horizontal than "vertical," not that the structure must be perfectly horizontal; rather, a slight tilt is permitted.

[0035] In the description of the embodiments of the present invention, "a plurality of" means at least two.

[0036] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0037] The handcuff structure of the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] 1 to 11 , a handcuff structure comprises a lock shell 1, a lock cover 2, a dynamic lock ring 3 and a key 5, wherein the lock shell 1 is fixedly connected to a first fixed lock ring 101, and the lock cover 2 is fixedly connected to a second fixed lock ring 201, a hinge shaft 12 is provided between the end of the first fixed lock ring 101 and the end of the second fixed lock ring 201, the dynamic lock ring 3 is movably hinged to the hinge shaft 12, and semicircular tooth grooves 301 are evenly provided on the outer side of the dynamic lock ring 3, and a lock hole 105 is provided on the side wall of the lock shell 1 away from the first fixed lock ring 101, characterized in that: a lock box 102 is provided on the side of the lock shell 1 close to the lock cover 2, a rotating wheel 4 is provided inside the lock box 102, and a rotating shaft 401 is provided on the axis of the rotating wheel 4, one end of the rotating shaft 401 extends into the first shaft hole 103 at the bottom of the lock box 102, and the other end of the rotating shaft 401 extends into the lock cover 2 A second axial hole 205 at the bottom of the cover body, wherein the first axial hole 103 and the second axial hole 205 are coaxially arranged;

[0039] The outer circumference of the rotating wheel 4 is provided with gear teeth 402 and a slot 404. The two side walls of the slot 404 are provided with a platform 405 and an inclined platform 406 respectively.

[0040] The lock housing 1 has a first lock groove 107 on one side thereof near the first fixed lock ring 101. A lock body 6 is provided inside the first lock groove 107 and is axially slidable along the first lock groove 107. A first spring 13 is provided between the bottom of the lock body 6 and the bottom of the first lock groove 107. A connecting groove 104 is provided between the first lock groove 107 and the lock box 102.

[0041] The lock body 6 is provided with multiple lock cylinders 601 on one side close to the dynamic lock ring 3, and a connecting rod 602 is fixed on the other side of the lock body 6. The connecting rod 602 extends from the connecting groove 104 into the inner part of the card slot 404;

[0042] The lock column 601 has a second lock groove 603 on the side facing the first fixed lock ring 101. The semicircular tooth groove 301 can pass through the groove walls on both sides of the second lock groove 603. The groove wall on the side of the second lock groove 603 of the lock column 601 close to the first spring 13 is set at an acute angle to the axis of the lock column 601. The groove wall on the other side of the second lock groove 603 is set perpendicular to the axis of the lock column 601.

[0043] The distance between the two side walls of the second locking groove 603 is greater than the thickness of the dynamic locking ring 3;

[0044] The key 5 is provided with a key shaft 501 and a driving gear 502 at the bottom end thereof. The driving gear 502 can be engaged with the gear teeth 402 on the outer peripheral surface of the rotating wheel 4.

[0045] As a preferred implementation scheme of this embodiment, the lock housing 1 and the lock cover 2 are fixedly connected by rivets 9; a third axial hole 106 is provided at the bottom of the lock box 102 near the gear teeth 402 of the rotating wheel 4, and the key shaft 501 at the bottom of the key 5 can be inserted into the third axial hole 106.

[0046] As a preferred implementation scheme of this embodiment, the lock cover 2 is provided with a positioning hole 203 coaxial with the third axis hole 106, and the lock cover 2 is provided with a guide groove 202 between the positioning hole 203 and the lock hole 105. The guide groove 202 is set to be L-shaped.

[0047] As a preferred implementation of this embodiment, baffles 7 are provided on both sides of the guide groove 202 inside the lock box 102.

[0048] As a preferred implementation scheme of this embodiment, the width of the guide groove 202 is greater than the diameter of the key shaft 501 , and the diameter of the key 5 body is smaller than the diameter of the positioning hole 203 .

[0049] As a preferred implementation scheme of this embodiment, a pin hole 403 is provided on the side of the rotating wheel 4 facing the lock cover 2, a limit pin 10 is provided inside the pin hole 403, a second spring 11 is provided between the limit pin 10 and the bottom of the pin hole 403, the top of the limit pin 10 is set to a hemispherical structure, and the lock cover 2 is located above the rotating wheel 4 and is provided with an arc groove 204. The center of the bottom of the arc groove 204 and the end of the bottom of the groove close to the inclined platform 406 are both provided with a limit pit 206 used in conjunction with the limit pin 10.

[0050] As a preferred implementation scheme of this embodiment, the upper surface of the platform 405 is lower than the bottom position of the outer circumference of the connecting rod 602, the inclined surface of the inclined platform 406 faces downward, and the highest point of the inclined surface of the inclined platform 406 is higher than the top position of the outer circumference of the connecting rod 602.

[0051] As a preferred implementation of this embodiment, a connecting buckle 8 for connecting a chain is installed on the side of the lock housing 1 away from the first fixed locking ring 101.

[0052] During the specific implementation of the present invention, when the handcuffs need to handcuff a person, the dynamic locking ring 3 crosses the fixed locking ring, and the semicircular tooth groove 301 on the outer side of the dynamic locking ring 3 moves between the groove walls on both sides of the second locking groove 603. The groove body of the semicircular tooth groove 301 presses the lower side wall of the second locking groove 603 downward, and the lock column 601 moves downward, and the groove body of the semicircular tooth groove 301 passes between the upper and lower groove walls of the second locking groove 603; when the dynamic locking ring 3 and the fixed locking ring have a tendency to open, the inner wall of the groove body of the semicircular tooth groove 301 is blocked by the column of the lock column 601 at the lower oblique groove wall of the second locking groove 603. At this time, the groove body of the semicircular tooth groove 301 cannot pass between the upper and lower groove walls of the lock groove 603.

[0053] When using key 5 to unlock handcuffs or adjust handcuffs to the safe position, the driving gear 502 at the bottom of the key 5 is extended from the inside of the lock hole 105 into the lock box 102, and the key shaft 501 of the key 5 moves along the guide groove 202 to the center of the positioning hole 203. The key shaft 501 of the key 5 is downwardly inserted into the inside of the third shaft hole 106, and the cylindrical body of the key 5 moves down into the positioning hole 203. At this time, the driving gear 502 is engaged with the gear teeth 402 on the outer peripheral surface of the rotating wheel 4. The key is turned, and the driving gear 502 drives the rotating wheel 4 to rotate. When the platform 405 on one side of the slot 404 of the rotating wheel 4 moves to just below the connecting rod 602, the lock column 601 cannot move downward, thereby causing the semicircular tooth groove 301 to be unable to press the lower side wall of the second lock groove 603 downward, and the dynamic lock ring 3 and the fixed lock ring cannot continue to cross each other. At this time, the limit pin 10 Insert the key into the limiting recess 206 at one end of the inclined platform in the arc-shaped slot 204, pull out the key, and the handcuffs are now in the safe position; turn the key, the driving gear 502 drives the rotating wheel 4 to rotate, and when the inclined platform 406 on one side of the slot 404 of the rotating wheel 4 moves to just above the connecting rod 602, the lower inclined surface of the inclined platform 406 squeezes the connecting rod 602 to move downward, and the connecting rod 602 pushes the lock column 601 to move downward. At this time, the position of the inclined groove wall below the second lock groove 603 is lower than the bottom position of the semicircular tooth groove 301, and the groove body of the semicircular tooth groove 301 can pass smoothly between the upper and lower groove walls of the second lock groove 603.

[0054] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A handcuff structure, comprising a lock shell (1), a lock cover (2), a dynamic lock ring (3) and a key (5), wherein the lock shell (1) is fixedly connected to a first fixed lock ring (101), the lock cover (2) is fixedly connected to a second fixed lock ring (201), a hinge shaft (12) is provided between the end of the first fixed lock ring (101) and the end of the second fixed lock ring (201), the dynamic lock ring (3) is movably hinged to the hinge shaft (12), the outer side of the dynamic lock ring (3) is uniformly provided with semicircular tooth grooves (301), a lock hole (105) is provided on the side wall of the lock shell (1) away from the first fixed lock ring (101), and the structure is characterized in that: The lock housing (1) is provided with a lock box (102) on one side close to the lock cover (2), and a rotating wheel (4) is provided inside the lock box (102). The axis of the rotating wheel (4) is provided with a rotating shaft (401), one end of the rotating shaft (401) extends into a first shaft hole (103) at the bottom of the lock box (102), and the other end of the rotating shaft (401) extends into a second shaft hole (205) at the bottom of the lock cover (2), and the first shaft hole (103) and the second shaft hole (205) are coaxially arranged; The outer circumference of the rotating wheel (4) is provided with gear teeth (402) and a slot (404), and the groove walls on both sides of the slot (404) are respectively provided with a platform (405) and an inclined platform (406); The lock housing (1) is provided with a first lock groove (107) on a side of the housing close to the first fixed lock ring (101), a lock body (6) is provided inside the first lock groove (107) and can slide axially along the first lock groove (107), a first spring (13) is provided between the bottom of the lock body (6) and the bottom of the first lock groove (107), and a connecting groove (104) is provided between the first lock groove (107) and the lock box (102); The lock body (6) is provided with a plurality of lock columns (601) on one side close to the dynamic lock ring (3), and a connecting rod (602) is fixedly provided on the other side of the lock body (6), and the connecting rod (602) extends from the connecting groove (104) into the interior of the clamping groove (404); The locking column (601) is provided with a second locking groove (603) on the side facing the first fixed locking ring (101), and the semicircular tooth groove (301) can pass through the groove walls on both sides of the second locking groove (603). The groove wall on the side of the second locking groove (603) of the locking column (601) close to the first spring (13) is set at an acute angle to the axis of the locking column (601), and the groove wall on the other side of the second locking groove (603) is set perpendicular to the axis of the locking column (601). The distance between the groove walls on both sides of the second locking groove (603) is greater than the thickness of the dynamic locking ring (3); The bottom end of the key (5) is provided with a key shaft (501) and a driving gear (502), and the driving gear (502) can be meshed and connected with the gear teeth (402) on the outer peripheral surface of the rotating wheel (4); The lock housing (1) and the lock cover (2) are fixedly connected by rivets (9); a third axial hole (106) is provided at the bottom of the lock box (102) near the gear teeth (402) of the rotating wheel (4), and the key shaft (501) at the bottom of the key (5) can be inserted into the third axial hole (106).

2. The handcuff structure according to claim 1, characterized in that: The locking cover (2) cover body is provided with a positioning hole (203) coaxial with the third axis hole (106), and the locking cover (2) cover body between the positioning hole (203) and the locking hole (105) is provided with a guide groove (202), and the guide groove (202) is set to be L-shaped.

3. The handcuff structure according to claim 2, characterized in that: Baffles (7) are provided inside the lock box (102) at both sides of the guide groove (202).

4. The handcuff structure according to claim 3, characterized in that: The width of the guide groove (202) is greater than the diameter of the key shaft (501), and the diameter of the key (5) body is smaller than the diameter of the positioning hole (203).

5. The handcuff structure according to claim 4, characterized in that: The rotating wheel (4) is provided with a pin hole (403) on the side of the wheel body facing the lock cover (2), a limit pin (10) is provided inside the pin hole (403), a second spring (11) is provided between the limit pin (10) and the bottom of the pin hole (403), the top of the limit pin (10) is provided with a hemispherical structure, the lock cover (2) is located above the rotating wheel (4) and has an arc groove (204) on the cover body, and the center of the bottom of the arc groove (204) and one end of the bottom of the groove close to the inclined platform (406) are both provided with a limit pit (206) used in conjunction with the limit pin (10).

6. The handcuff structure according to claim 5, characterized in that: The upper surface of the platform (405) is lower than the bottom position of the outer peripheral surface of the connecting rod (602), the inclined surface of the inclined platform (406) faces downward, and the highest point of the inclined surface of the inclined platform (406) is higher than the top position of the outer peripheral surface of the connecting rod (602).

7. The handcuff structure according to claim 6, characterized in that: A connecting buckle (8) for connecting a chain is installed on the side of the lock housing (1) away from the first fixed lock ring (101).

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