Handcuff of key locking prevention type and key locking prevention method

Abstract

The present invention relates to a handcuff, and more specifically, to a handcuff of key locking prevention type and key locking prevention method, wherein a key is disposed on the outer side of the forward direction of a locking bar to prevent the key from being caught by the locking bar when the key returns to an original position after the key is operated, so that the key can be easily withdrawn and the handcuff can be used more conveniently.

Description

Handcuffs and key jam prevention methods of anti-key jamming type

[0001] The present invention relates to handcuffs, and more particularly, to a handcuff and a method for preventing key jamming, wherein a key is arranged on the outside of a locking bar in a forward direction so that the key is not caught by the locking bar when the key returns to its original position after the key is operated, thereby enabling the key to be easily withdrawn and thus enabling the handcuffs to be used more conveniently.

[0002] Generally, handcuffs refer to a device that restrains the wearer's actions by binding the wearer's wrists. Such handcuffs, as shown in Fig. 1, include a fixed arm (1) that wraps around the wearer's wrist and a movable arm (2). The fixed arm (1) includes a fixed arm body (11) having an arc shape with a specific curvature, and a plate-shaped plate part (12) provided at an end of the fixed arm body (11). The fixed arms (1) are generally provided as a pair. The movable arm (2) includes a movable arm body (21) having an arc shape with a specific curvature. The movable arm body (21) is provided so as to be rotatably connected between the pair of fixed arm bodies (11) by a pin. A ratchet part (22) is formed on one side of the movable arm body (21).

[0003] Between the above plate parts (12), a head part (3) is arranged. The head part (3) has a plate shape, and a locking bar (4) and a fixed bar (5) are arranged inside the plate part (3). The fixed bar (5) is provided so as to be rotatable up and down based on a specific point. A ratchet part (52) is formed at the lower end of the fixed bar (5) and is coupled with the ratchet part (22) of the movable arm (2). Therefore, when the movable arm (2) is coupled to the fixed bar (5), rotation in the opposite direction is impossible due to the coupling action of the ratchet, so the wearer can arbitrarily release the movable arm of the handcuff, thereby restricting the wearer's actions.

[0004] These fixed bars (5) and locking bars (4) are described with reference to Fig. 2.

[0005] Fig. 2(a) shows a state in which the fixed bar (5) and the locking bar (4) are in contact with each other, and the fixed bar (5) cannot move up and down, so that the movable bar is restrained. In this state, when the key (K) is inserted and rotated as shown in Fig. 2(b), the locking bar (4) retreats to the left in the drawing. By the retreat of the locking bar (4), the contact state between the locking bar (4) and the fixed bar (5) is released as shown in Fig. 2(c), allowing the fixed bar (5) to rise. At this time, the fixed bar (5) rises as the protruding bar (K2) of the key (K) is caught in the catch (53). By the rising of the fixed bar (5), the connection with the movable arm is released, allowing the movable arm to rotate, so that the movable arm can be removed from the wearer's wrist.

[0006] However, these prior technologies had the following problems:

[0007] As shown in Fig. 3(a), when the locking bar (4) and the fixed bar (5) are in contact with each other and the fixed bar (5) is fixed, and the locking bar (4) is moved backward as shown in Fig. 3(b), the contact state of the fixed bar (5) is released. However, as shown in Fig. 3(c), when the manager presses the locking bar (4) to move the locking bar (4) forward in the right direction in the drawing, the locking bar (4) and the fixed bar (5) come into contact with each other. At this time, when the manager tries to return the key to its original position (Fig. 3(a)) in order to withdraw the key, the key is caught on the locking bar (4) and cannot return to its original position, and as a result, the key cannot be withdrawn, which increases the inconvenience in use.

[0008] Meanwhile, the handcuffs themselves described above are widely known and are described in detail in the prior art literature below, so their description and illustration are omitted.

[0009] The present invention is intended to solve the above-described problem, and provides a handcuff of a key-jamming prevention type and a key-jamming prevention method, in which a key is arranged outside the forward direction of a lock bar so that the key is not caught by the lock bar when returning to its original position after the key is operated, thereby enabling the key to be easily withdrawn and thus enabling the handcuff to be used more conveniently.

[0010] However, the purpose of the present invention is not limited to the purpose mentioned above, and other purposes not mentioned will be clearly understood by those skilled in the art from the description below.

[0011] In order to achieve the above object, the present invention provides a handcuff of a key-jamming prevention type, which includes a fixed bar (500) that is ratcheted and coupled with a movable arm (200) of a handcuff (10), a locking bar (400) that selectively locks the fixed bar (500), and a key (K) that drives the fixed bar (500) and the locking bar (400), wherein the locking bar (400) moves by contacting the key (K), and the key (K) is disposed outside the forward direction of the locking bar (400), so that when the key (K) returns to its original position after the key (K) is operated, it does not get caught on the locking bar (400).

[0012] In the above, the handcuffs (10) include a pair of fixed arms (100) and a head portion (300) disposed between the fixed arms (100), the movable arm (200) is rotatably disposed between the fixed arms (100) to wrap around the wearer's wrist, and inside the head portion (300), a fixed bar (500) for controlling the movement of the movable arm (200) and a locking bar (400) for selectively locking the fixed bar (500) are disposed, and the key (K) is inserted into the head portion (300) to drive the fixed bar (500) and the locking bar (400).

[0013] In the above, the key (K) includes a cylindrical key body (K1) and a protruding bar (K2) protruding from the outer surface of the key body (K1), and when the key (K) is inserted, the protruding bar (K2) is arranged on the outer side in the forward direction of the locking bar body (410), so that when the key (K) is operated, the protruding bar (K2) presses the outer surface of the locking bar body (410) to move it backward, and when the manager moves the locking bar (400) forward, the key (K) rotates in the opposite direction of the operating direction to return to its original position.

[0014] In the above, the fixed bar (500) includes a plate-shaped fixed bar body (510), a ratchet portion (520) protruding from the lower side of the fixed bar body (510), and a catch portion (530) protruding from the upper side of the fixed bar body (510) and catches a key (K), and the key (K) is arranged on the outer side in the forward direction of the locking bar (400) with respect to the catch portion (530), so that the key (K) rotates to catch the catch portion (530) and then rotates in the opposite direction to return to its original position.

[0015] In the above, the head part (300) includes a first plate body (310) and a second plate body (320) that are detachably coupled, and the second plate body (320) includes a second plate body main body (3210) in the shape of a plate body having a specific thickness, and a groove portion (3240) having a specific depth is formed in the second plate body main body (3210) so that a fixing bar (500) and a locking bar (400) are mounted therein, and an opening portion (3220) is formed in a portion of the lower surface of the second plate body main body (3210) so that a ratchet portion (520) of the fixing bar (500) is exposed.

[0016] In the above, an intrusion prevention part (3230) formed in a ratchet shape is formed on one or both sides of the opening part (3220) of the lower surface of the second plate body (3210).

[0017] In the above, the fixed bar (500) further includes a groove (540) formed between the plate-shaped fixed bar body (510) and the ratchet portion (520), and the bottom of the groove (540) is formed to be exposed upwards more than the upper end of the ratchet portion (220) of the movable arm (200), and the bottom of the groove (540) is formed to be inclined upwards as it goes in the forward direction of the locking bar (400).

[0018] In the above, the fixed arm (100) includes a fixed arm body (110) in an arc shape and a plate-shaped plate part (120) arranged on one side of the fixed arm body (110), and an intrusion prevention protrusion (150) protrudes from the side of the fixed arm body (110) or the plate part (120) toward the head part (300).

[0019] In addition, the present invention provides a method for using the handcuffs described above, wherein a key (K) is inserted into a head portion (300), the key (K) is positioned outside the forward direction of a locking bar (400), and even when the locking bar (400) is advanced, the key (K) can return to the initially inserted position, so that even when the locking bar (400) is advanced and the locking bar (400) and the fixed bar (500) are mutually locked, the key (K) can be withdrawn, thereby providing a method for preventing a key from getting caught in a handcuff.

[0020] The features and advantages of the present invention will become more apparent from the following detailed description based on the attached drawings.

[0021] Prior to this, the terms and words used in this specification and claims should not be interpreted in their usual or dictionary meanings, but should be interpreted in the sense and concept that is consistent with the technical idea of ​​the present invention, based on the principle that the inventor can appropriately define the concept of the term to explain his or her own invention in the best way.

[0022] According to the present invention described above, when the key is operated and returns to its original position, the key is prevented from being caught on the lock bar, so that the key can be easily withdrawn, and thus the handcuffs can be used more conveniently.

[0023] Figures 1 to 3 are schematic diagrams illustrating typical handcuffs.

[0024] Figures 4 and 5 are schematic diagrams showing the operation process of handcuffs according to one embodiment of the present invention.

[0025] Figure 6 is an enlarged view showing the shape of the ratchet portion of a handcuff according to one embodiment of the present invention.

[0026] Figures 7 to 10 are exploded views of handcuffs according to one embodiment of the present invention.

[0027] Hereinafter, preferred embodiments of the present invention will be described with reference to the attached drawings. In this process, the thickness of lines and the sizes of components depicted in the drawings may be exaggerated for clarity and convenience of explanation.

[0028] Additionally, the terms described below are defined based on their functions within the present invention, and their meanings may vary depending on the intent or custom of the user or operator. Therefore, the definitions of these terms should be based on the contents of this specification.

[0029] In addition, the examples below do not limit the scope of the present invention, but are merely exemplary of the components presented in the claims of the present invention, and examples that include components that are included in the technical idea throughout the specification of the present invention and can be substituted as equivalents in the components of the claims may be included in the scope of the present invention.

[0030]

[0031] A handcuff (10) according to one embodiment of the present invention includes a fixed bar (500) that is ratcheted and coupled with a movable arm (200), a locking bar (400) that selectively locks the fixed bar (500), and a key (K) that drives the fixed bar (500) and the locking bar (400), as illustrated in FIGS. 4 to 10. That is, similar to the conventional technology described above, the wearer's wrist is bound by the movable arm (200), while the movable arm (200) is coupled with the fixed bar (500). To this end, a ratchet portion (530) is formed on the fixed bar (500), and a ratchet portion (220) is also formed on the movable arm (200). The ratchet portions (530, 220) are mutually coupled to restrain the movable arm (200) from moving. This fixed bar (500) is locked or unlocked by the locking bar (400). At this time, in the present invention, the key (K) is placed on the outside of the locking bar (400) in the forward direction.

[0032] To explain in more detail, as shown in Fig. 4(a), the key (K) is inserted while the fixed bar (500) is in contact with the locking bar (400) and locked. When the key (K) is operated in this state, the locking bar (400) moves by contacting the key (K). As shown in Fig. 4(b), when the key (K) rotates counterclockwise and the locking bar (400) moves backward (to the left in the drawing), the locking bar (400) and the fixed bar (500) are released from the contact state.

[0033] Even if the manager presses the lock bar (400) in this state and moves the lock bar (400) forward (to the right in the drawing) to the state of Fig. 4(c), the key (K) can rotate counterclockwise and thus return to the initial inserted state of the key (Fig. 4(a)). That is, according to the present invention, even if the manager presses the lock bar (400), the key can return to its original position, allowing the key to be withdrawn.

[0034] In the prior art, as described with reference to FIG. 3, when the manager presses the locking bar (4) to move the locking bar (4) forward in the right direction in the drawing, the locking bar (4) and the fixed bar (5) come into mutual contact. At this time, when the manager tries to return the key to its original position (FIG. 3(a)) in order to withdraw the key, the key is caught on the locking bar (4) and cannot return to its original position, and thus the key cannot be withdrawn, which increases the inconvenience in use.

[0035] The present invention solves this problem, and as described above, even if the lock bar is pressed, the key can be returned to its original position, allowing the key to be withdrawn, and thus the convenience of use can be improved compared to the prior art.

[0036] Meanwhile, when the key (K) is rotated clockwise in the state shown in Fig. 4(b), the engaging portion (530) of the fixed bar (500) is engaged with the key (K) and rises. The fixed state of the movable arm is released by the rising of the fixed bar (500). Since this action is the same as described above, a duplicate description will be omitted.

[0037] Meanwhile, the handcuffs (10) may include a pair of fixed arms (100) and a head portion (300) disposed between the fixed arms (100). At this time, the movable arm (200) is provided so as to be rotatable between the fixed arms (100) and wraps around the wearer's wrist. Inside the head portion (300), a fixed bar (500) for controlling the movement of the movable arm (200) and a locking bar (400) for selectively locking the fixed bar (500) are disposed. At this time, the key (K) is inserted into the head portion (300) to drive the fixed bar (500) and the locking bar (400). Since the fixed arm, the movable arm, and the head portion itself are the same as the conventional technology described above, a duplicate description will be omitted.

[0038] Meanwhile, the key (K) may include a cylindrical key body (K1) and a protruding bar (K2) protruding from the outer surface of the key body (K1). At this time, when the key (K) is inserted, the protruding bar (K2) is arranged on the outer side in the forward direction of the locking bar body (410). In the embodiment illustrated in Fig. 4, the protruding bar (K2) is arranged on the right side of the locking bar body (410) in the drawing. According to the present invention, the protruding bar (K2) can return to its original position regardless of the forward and backward movement of the locking bar body (410).

[0039] For example, even if the key (K) is inserted as shown in Fig. 4(a) and the locking bar (400) is moved forward and locked as shown in Fig. 4(c), the key (K) can be rotated counterclockwise to return to its original position, thereby enabling withdrawal.

[0040] That is, when the key (K) is operated, the protruding bar (K2) presses the outer surface of the locking bar body (410) to move it backward in the left direction in the drawing (see FIG. 4(a)), and when the manager moves the locking bar (400) forward (see FIG. 4(c)), the key (K) can return to its original position by rotating in the opposite direction of the operating direction, i.e., counterclockwise, thereby enabling the key to be extracted.

[0041] The above fixed bar (500) may include a plate-shaped fixed bar body (510), a ratchet portion (520) protruding from the lower side of the fixed bar body (510), and a catch portion (530) protruding from the upper side of the fixed bar body (510) and engaging with a key (K). At this time, the key (K) is arranged on the outer side in the forward direction of the locking bar (400) with respect to the catch portion (530). In the case of the embodiment illustrated in FIG. 5, the key (K) is arranged on the drawing right side (in the forward direction of the locking bar) of the catch portion (530).

[0042] That is, as shown in Fig. 5(a), when the key (K) is inserted and rotated counterclockwise, the locking bar (400) moves back to the left in the drawing as shown in Fig. 5(b). As a result, the contact state between the locking bar (400) and the fixed bar (500) is released as shown in Fig. 5(b). At this time, when the key (K) is rotated clockwise, the key (K) is caught by the engaging portion (530), thereby raising the fixed bar (500) and releasing the lock state of the movable arm. Thereafter, when the key (K) is rotated counterclockwise, the key (K) returns to its original position as shown in Fig. 5(d), thereby allowing the key to be extracted.

[0043] In other words, according to the present invention, it is possible to withdraw the key after operating the key, thereby improving convenience in use.

[0044] The above-described fixed bar (500) and locking bar (400) are accommodated inside the head portion (300). The head portion (300) includes a first plate body (310) and a second plate body (320) that are detachably coupled to the head portion (300). That is, the locking bar (400) and the fixed bar (500) are arranged between the first plate body (310) and the second plate body (320).

[0045] At this time, a protruding guide (440) may be formed on one side of the locking bar body (410) of the locking bar (400). In addition, a guide opening portion (3160, 3260) formed as an opening portion in the first plate body (310) and the second plate body (320) may be formed. When the protruding guide (440) is inserted into the guide opening portion (3160, 3260) and moves, stable movement of the locking bar (400) can be realized.

[0046] In addition, key insertion holes (3130, 3230) are formed in the first plate body (310) and the second plate body (320) so that a key (K) can be inserted.

[0047] The second plate body (320) may include a second plate body (3210) in the shape of a plate body having a specific thickness. A groove (3240) having a specific depth is formed in the second plate body body (3210), and a fixing bar (500) and a locking bar (400) may be mounted in the groove (3240). At this time, an opening (3220) is formed in a portion of the lower surface of the second plate body (3210), so that the ratchet portion (520) of the fixing bar (500) is exposed.

[0048] That is, there may be an attempt to release the handcuffs by introducing a foreign substance between the ratchet portion of the movable arm and the ratchet portion of the fixed bar to disengage the ratchet portion. To neutralize such an attempt, the opening portion (3220) is formed so that only a portion of the ratchet portion (520) of the fixed bar is exposed.

[0049] Additionally, it is also possible to form an intrusion prevention part (3230) in a ratchet shape on one or both sides of the opening part (3220) on the lower side of the second plate body (3210).

[0050] As described above, there may be an attempt to introduce foreign matter between the ratchet portion of the movable arm and the ratchet portion of the fixed bar, and in order to prevent the intrusion of such foreign matter, the intrusion prevention portion (3230) is formed on one or both sides of the opening portion (3220). That is, since the intrusion prevention portion (3230) has a ratchet shape, even if a foreign matter intrudes, it is caught by the intrusion prevention portion (3230) and the direction of entry is changed, thereby preventing further intrusion.

[0051] Meanwhile, as shown in Fig. 6, the fixed bar (500) further includes a grooved portion (540) formed between the plate-shaped fixed bar body (510) and the ratchet portion (520). The bottom of this grooved portion (540) is formed to be exposed upwards from the upper end of the ratchet portion (220) of the movable arm (200). At this time, the bottom of the grooved portion (540) is formed to be inclined upwards as it goes in the forward direction (right direction in the drawing) of the locking bar (400).

[0052] That is, as described above, there may be an attempt to insert a foreign substance between the ratchet portion of the movable arm and the ratchet portion of the fixed bar. At this time, since the bottom of the groove portion (540) is arranged to slope upward in the forward direction of the locking bar (400), i.e., the direction in which the foreign substance is inserted, when a foreign substance is inserted into this groove portion (540), the fixed bar (500) moves downward due to the inserted foreign substance, and thereby the ratchet portion (520) of the fixed bar (500) and the ratchet portion (220) of the movable arm are more firmly pressed against each other. Therefore, even if a foreign substance is inserted, the locked state of the movable arm is not released.

[0053] Meanwhile, the fixed arm (100) may include a fixed arm body (110) in an arc shape and a plate-shaped plate part (120) disposed on one side of the fixed arm body (110). A head part (300) is disposed between the plate part (120). At this time, there may be an attempt to release the handcuffs by infiltrating a foreign substance through the gap between the plate part (120) and the head part (300). To prevent this, an intrusion prevention protrusion (150) protrudes from the side of the fixed arm body (110) or the plate part (120) toward the head part (300). Infiltration of the foreign substance can be prevented by this intrusion prevention protrusion (150).

[0054] Hereinafter, the method of using the handcuffs (10) of the present invention will be described again with reference to FIGS. 4 to 10 previously discussed.

[0055] First, the key (K) is inserted into the head portion (300), and the key (K) is positioned on the outer side in the forward direction of the locking bar (400). In the present embodiment, the key (K) is positioned on the right side of the locking bar (400) in the drawing. According to the present invention, even when the locking bar (400) is moved forward, the key (K) can return to the initially inserted position.

[0056] According to the present invention, the locking bar (400) moves forward so that the key (K) can be withdrawn even when the locking bar (400) and the fixed bar (500) are mutually locked, thereby enabling the handcuffs to be used more conveniently.

[0057]

[0058] Although the present invention has been described in detail through specific examples, this is intended to specifically explain the present invention, and the present invention is not limited thereto, and it is clear that modifications and improvements can be made by those skilled in the art within the technical spirit of the present invention.

[0059]

[0060] All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

[0061]

[0062] 100: Fixed arm 110: Fixed arm body

[0063] 120: plate body 150: intrusion blocking protrusion

[0064] 200: Movable arm 220: Ratchet part

[0065] 300: Head 310: First plate

[0066] 320: Second plate body 3210: Second plate body

[0067] 3220: Opening part 3230: Intrusion prevention part

[0068] 400: Locking bar 410: Locking bar body

[0069] 500: Fixed bar 510: Fixed bar body

[0070] 520: Ratchet part 530: Hook part

Claims

1. It includes a fixed bar (500) that is coupled to the movable arm (200) of the handcuff (10) and a ratchet, a locking bar (400) that selectively locks the fixed bar (500), and a key (K) that drives the fixed bar (500) and the locking bar (400). The above locking bar (400) moves in contact with the key (K), and the key (K) is positioned outside the forward direction of the locking bar (400). A handcuff of a key-jamming prevention type that does not get caught on the lock bar (400) when the key (K) returns to its original position after the key (K) is operated.

2. In paragraph 1, The above handcuffs (10) include a pair of fixed arms (100) and a head portion (300) positioned between the fixed arms (100). The above movable arm (200) is provided to be rotatable between the above fixed arm (100) and wraps around the wearer's wrist, Inside the above head portion (300), a fixed bar (500) for controlling the movement of the movable arm (200) and a locking bar (400) for selectively locking the fixed bar (500) are arranged. A key-jamming prevention type handcuff in which the above key (K) is inserted into the above head portion (300) to drive the above fixed bar (500) and the locking bar (400).

3. In paragraph 1, The above key (K) includes a cylindrical key body (K1) and a protruding bar (K2) protruding from the outer surface of the key body (K1). When the above key (K) is inserted, the protruding bar (K2) is placed on the outer side in the forward direction of the locking bar body (410). A handcuff of a key-jamming prevention type in which, when the above key (K) is operated, the above protruding bar (K2) presses the outer surface of the locking bar body (410) to move it backward, and when the manager moves the above locking bar (400) forward, the above key (K) rotates in the opposite direction of the operating direction to return to its original position.

4. In paragraph 1, The above fixed bar (500) includes a fixed bar body (510) in the shape of a plate, a ratchet portion (520) protruding from the lower side of the fixed bar body (510), and a hook portion (530) protruding from the upper side of the fixed bar body (510) and hooked with a key (K). The above key (K) is placed on the outer side of the locking bar (400) in the forward direction with respect to the above catch (530), A handcuff of a key-jamming prevention type in which the key (K) rotates to be caught by the catch (530) and then rotates in the opposite direction to return to its original position.

5. In paragraph 2, The above head part (300) includes a first plate body (310) and a second plate body (320) that are detachably connected, The above second plate body (320) includes a second plate body (3210) in the shape of a plate body having a specific thickness, A groove (3240) of a specific depth is formed in the second plate body (3210) above, and a fixing bar (500) and a locking bar (400) are installed therein. A key-jamming prevention type handcuff in which an opening (3220) is formed on a portion of the lower surface of the second plate body (3210) to expose the ratchet portion (520) of the fixed bar (500).

6. In Article 5, A handcuff of the key-jamming prevention type, in which an intrusion prevention part (3230) formed in a ratchet shape is formed on one or both sides of an opening part (3220) on the lower side of the second plate body (3210).

7. In paragraph 4, The above fixed bar (500) further includes a groove (540) formed between the fixed bar body (510) in the shape of a plate and the ratchet portion (520). The bottom of the above groove (540) is formed to be exposed upwards from the upper part of the ratchet part (220) of the movable arm (200). A handcuff of the key-jamming prevention type in which the bottom of the above-mentioned groove (540) is formed to slope upward in the forward direction of the locking bar (400).

8. In paragraph 2, The above fixed arm (100) includes a fixed arm body (110) in the shape of an arc and a plate body part (120) in the shape of a plate body placed on one side of the fixed arm body (110). A handcuff of the key jamming prevention type in which an intrusion prevention protrusion (150) protrudes from the side of the head portion (300) of the fixed arm body (110) or plate portion (120).

9. A method of using handcuffs as described in any one of paragraphs 1 to 8, Insert the key (K) into the head (300), and place the key (K) on the outside in the forward direction of the lock bar (400). Even if the above lock bar (400) is advanced, the key (K) can return to the initially inserted position. A method for preventing key jamming of a handcuff, wherein the key (K) can be withdrawn even when the locking bar (400) moves forward and the locking bar (400) and the fixed bar (500) are mutually locked.

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