JPH07301041A - Handcuff - Google Patents

Abstract

PURPOSE:To provide a handcuff capable of being surely locked with simple constitution and high strength. CONSTITUTION:A handcuff is constituted of a rotational body 10 in the shape of a circular arc, an instrumental enclosure 14 holding the rotational body 10 in a turnable manner and an instrumental enclosing section 12 formed of the instrumental enclosure 14 and forming a space into which the front end of the rotational body 10 can be inserted. It is constituted of a plurality of gear holes 16 provided to the front end of the rotational body 10, a gear 30 engaged with the gear holes 16 provided to the instrumental enclosing section 12, a lock body 32 engaged with the gear 30, a spring member 34 energizing the lock body 32 in the direction of the engagement and a lock 40 lockable to a position engaging the lock body 32 with the gear 30 and a position separated from the gear 30. A line of action of force acted on the lock body 32 in accordance with the rotation of the gear 30 is provided in the approximate direction of a rotational shaft 25 of the lock body 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to handcuffs used for arrest and detention of criminals and as a guard in prisons.

[0002]

2. Description of the Related Art Conventionally, handcuffs are disclosed in Japanese Patent Publication No. 59-52276
As disclosed in Japanese Unexamined Patent Publication No. 2004-242, in order to lock the handcuff on the wrist so that the ring diameter does not expand or contract, a tooth hole is formed on the side surface of the distal end portion of the arc-shaped rotating body, and inside the handcuff. A gear that engages with the tooth hole, a lock body that engages with the gear, and a lock that locks the lock body at a predetermined position are provided. The rotating body of the handcuff is rotatably supported by an arcuate portion extending from the container portion which is the main body of the handcuff. Further, the lock body engages with the gear and is biased by a spring so as to be retractable as the gear rotates. Further, the lock rotates at a predetermined angle between a position where the lock is locked so that it cannot be rocked and a position where it can be rocked, and normally, the lock is moved to a position where it can be rocked by a leaf spring. Energized and held.

According to the method of using the handcuff, when the handcuff is applied, the rotating body is turned around the wrist so that the tooth hole is engaged with the gear of the housing. At this time, the gear is engaged with the lock body, but the lock body retreats against the biasing force of the spring, and the rotary body easily rotates to the thickness of the wrist. In this state, even if the rotating body is pulled in the opening direction, the gear engaged with the tooth hole of the rotating body engages with the lock body and the gear rotates only by applying a compressive and bending force to the lock body. Without, the rotating body does not swing. Then, so that the wrist is not tightened any more, the key is inserted into the device housing, and the lock is rotated to lock the lock at a position where the lock does not swing. Also, when unlocking the handcuffs, the lock body is swung to the retracted position by the key. This is to pull the rotating body and remove the handcuffs from the wrist.

[0004]

In the case of the above conventional technique, when a force in the direction of opening the rotating body is applied to the lock body, a force in the compression direction and a bending moment act on the lock body. , Since the force is applied to the lock body in the direction in which the lock body is released from the state where the lock body is locked at the predetermined position, the locket position may become unstable and the locket may come off. There was a problem. Further, when a stronger force is applied, the gear may engulf the lock body, rotate, and the rotary body may come off. Further, when the lock is rotated to the unlocked position, the lock is rotated by the key. Therefore, it is necessary to form a wide portion for retracting the lock on the key. The reaction when rotating the lock is
It caused the neck of the key to be twisted.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a handcuff having a simple structure, high strength, and reliable locking.

[0006]

According to the present invention, there are provided an arc-shaped rotating body, a container housing that rotatably holds the rotating body, and a container housing portion at a base end portion of the container housing. A space is formed through which the tip of the rotor can be inserted, and the tip of the rotor is
A plurality of tooth holes are formed, a gear that engages with the tooth hole, a lock body that engages with the gear wheel, and a spring member that biases the lock body in the engagement direction, A lockable lock is provided at a position where the lock body is engaged with the gear and a position retracted from the gear, and a line of action of a force acting on the lock body generated with the rotation of the gear is approximately the above. It is a handcuff provided so as to face the rotation axis of the lock body.

In a state where the lock body is locked at a position where it is engaged with the gear, the contact position between the lock and the lock is determined by the point of action of the force acting on the lock from the gear and the lock. A line that is located on the opposite side of the rotation axis of the lock body with respect to the line connecting the rotation centers and that connects the contact position between the lock and the lock body and the rotation axis of the lock body, The angle formed by the line connecting the contact position between the lock and the lock and the rotation center of the lock is 90 degrees or less.

[0008]

In the handcuffs of the present invention, when the force for expanding the rotary body acts, the force applied from the gear to the lock body is only the force in the compression direction toward the rotation center of the lock body, The force in the direction of disengaging the body and the lock does not act, and the lock and the gear are less likely to be deformed or damaged. Also, even if a force that closes the rotating body acts while the lock is locked, the force acting on the lock via the gear compresses the lock in the direction of its rotation axis. Acting as a force to cause the lock to engage the lock more securely with the lock body.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of the present invention, and a handcuff of this embodiment comprises an arc-shaped rotating body 10 and a container casing 14 having a container casing 12. The rotating body 10 is made of an aluminum alloy, and a tooth hole 16 composed of a plurality of holes is formed on the outer side surface of the rotating body 10 at approximately half the side thereof at regular intervals. Further, along the tooth holes 16, on the side surfaces of the rotating body 10 facing each other,
A pair of arcuate grooves 17 are formed.

The container housing 14 is a pair of aluminum alloy plate-like members, and has a tip end portion formed into an arcuate portion 15, and a base end of the rotating body 10 is provided between the tip end portions of the arcuate portion 15. The part is pivotally supported by a pin 19. The container casing 12 is composed of container casings 14 arranged to face each other, and a pair of frame bodies 18 are sandwiched between the peripheral portions of the container casings 14 so as to face each other inside the frame bodies 18 and contact the container casing 14. The support plate 20 provided by the above is attached. Protrusions 22 slightly projecting from the side surfaces are formed near the arcuate portion 15 of the container case 14, and the protrusions 22 engage with the arcuate grooves 17 as the rotating body 10 rotates and rotate. It guides in the moving direction.

The frame 18 provided in the container casing 12 is fixed to the container casing 14 by the rivets 23, and a space is formed between the pair of container casings 14 by the frame 18. A first rotary shaft 24 and a second rotary shaft 25 projecting from the support plate 20 are provided in the space of the device casing 12, and a support column 26 and a latch column 27 are integrally projected. ing. A gear 30 having protrusions at equal pitch is pivotally supported on the first rotary shaft 24, and a base end portion of a lock body 32 is pivotally supported on the second rotary shaft 25. Further, the support column 26 holds a leaf spring 34 which is a spring member whose one end is engaged with the retaining column 27 and the other end is engaged with the step portion 33 of the lock body 32. The leaf spring 34 is a lock 32.
To urge the lock body 32 toward the gear 30.

The lock body 32 has an equi-tangential surface 35 at its tip end in contact with a valley portion of the gear 30, and a notch portion 36 is formed on one side of a base end portion pivotally supported by the second rotary shaft 25. ing. A lock 40 formed corresponding to the key insertion hole 38 formed in the container housing 14 on one side is located near the notch 36, and an engagement hole 42 of the lock 40 is formed. It is formed coaxially with the key insertion hole 38. Further, a locking portion 43 is formed at the tip of the lock 40, and the locking portion 43 is located in the cutout portion 36 of the lock body 32, and the engaged portions 37a on both sides of the cutout portion 36, 37
It is provided so that it can be engaged with b. And this lock 40
The key 41 inserted from the key insertion hole 38 into the engagement hole 42 of
Is inserted and abuts.

A first concave surface 50 and a second concave surface 52 are formed on the side surface of the lock 40 opposite to the engaging portion 43. The first and second concave surfaces 50 and 52 are formed of an elastic body 54 such as a coil spring or rubber attached to the support plate 20 in the container casing 12.
To engage with. The first concave surface 50 engages with the elastic body 54 in a state in which the locking portion 43 of the lock 40 is positioned in the space of the cutout portion 36 of the lock body 32, and the second concave surface 52 defines the lock 40. The locking portion 43 of the lock body is engaged with the elastic body 54 at a position where the locking portion 43 contacts the locked portion 37b of the lock body 32.

A connecting chain 44 for connecting a pair of handcuffs and a ring member 46 for holding the connecting chain 44 on the container housing 14 side are provided at the lower end of the container housing 12. One end of the ring member 46 has a ring shape and is connected with the connecting chain 44, and the other end is formed with an enlarged portion 47 having a larger diameter at the tip of the neck portion 45. The enlarged portion 47 is engaged with a hole 48 formed in each of the support plates 20 of the container case 12 to prevent it from coming off.
Further, the neck portion 45 is inserted into a gap between the pair of frame bodies 18, and is sandwiched and held by the container housings 14 on both sides.

In the method of using the handcuff of this embodiment, first, when the handcuff is applied, the rotating body 10 is turned around the wrist so that the tooth hole 16 at the tip end thereof is engaged with the gear 30 of the device casing 12. .
At this time, as shown in FIG.
Engages with the protrusion 22 of the container casing 12 to stably swing the rotating body 10. At this time, the lock body 32 is engaged with the gear 30, but the locking portion 43 of the lock 40 is located in the space within the notch portion 36 of the lock body 32, and the lock body 32 of the leaf spring 34. It can be retracted against the urging force, and the gear 30 rotates clockwise in the drawing as the rotating body 10 swings. And
The rotating body 10 easily moves until the ring formed by the rotating body 10 and the device housing 14 has the thickness of the wrist.

In this state, when the rotating body 10 is pulled in the opening direction, the gear 30 engaged with the tooth hole 16 of the rotating body 10
Applies a force in the compression direction to the lock body 32 in an attempt to rotate counterclockwise in the drawing. That is, the first rotating shaft 24 that supports the gear 30 and the second rotating shaft 25 that supports the lock 32.
And a line connecting points where the contact surface 35 of the lock body 32 contacts the gear 30 forms a triangle, and even if the gear 30 tries to rotate counterclockwise, the first rotary shaft 24 and the second rotary shaft 24 Since the distance between 25 does not change, the gear 30 cannot rotate counterclockwise from this state unless the gear 30 or the lock 32 is compressed and crushed. Further, the force exerted on the lock body 32 from the gear 30 is the second rotary shaft 2 that supports the lock body 32.
The force is only in the direction intersecting with 5, and an unnecessary moment and force in other directions hardly act on the lock 32. Therefore, even if the rotating body 10 is pulled in the opening direction,
As shown in FIG.
The gear 30 does not rotate at that position only by applying a force in the compression direction, and the rotating body 10 does not swing.

Then, in order to lock the rotating body 10 so as not to tighten the wrist any further, as shown in FIG. 4, the key 41 is inserted into the key insertion hole 38 of the container casing 14 to lock the lock 4.
0 is rotated counterclockwise in the drawing to bring the locking portion 43 into contact with the locked portion 37b of the lock body 32. At this time, as shown in FIG. 4, the second concave surface 52 of the lock 40 engages with the elastic body 54 to hold its position. In this state, the locking of the handcuffs of this embodiment is completed. Then, in this state, the rotating body 1
Even if 0 is opened, the rotating body 10 does not move as described above. On the contrary, when the rotating body 10 is to be closed, a clockwise rotating force acts on the gear 30 to move the lock body 32.
An attempt is made to swing counterclockwise in the drawing around the second rotary shaft 25. However, in the lock body 32, the engagement portion 43a of the lock 40 abuts on the engaged portion 37a of the cutout portion 36, and the head portion of the engagement portion 43 abuts on the slope 36a of the cutout portion 36. Therefore, the lock 32 does not swing.

At this time, the gear 30, the lock 32, and the lock 40
As for the positional relationship between the lock body 32 and the lock body 32, the locking portion 43 of the lock 40 is locked at the position where the lock body 32 is engaged with the gear 30.
The position Q abutting on the inclined surface 36a of the second position is the center of rotation of the lock body 32 with respect to the line connecting the point P of action of the force acting from the gear 30 to the lock body 32 and the center of rotation O of the lock 40. It is located on the opposite side of the certain second rotary shaft 25. Moreover, the contact position Q between the locking portion 43 of the lock 40 and the slope 36a of the lock 32 is rotated about the contact position Q by the second rotary shaft 25 of the lock 32 and the lock 40. The angle formed by the line segment connecting the center O is set to 90 degrees or less. Therefore, when the gear 30 tries to rotate clockwise in the drawing, the lock 32
Even if a force in the counterclockwise direction is applied to the position Q, since the position Q with which the locking portion 43 abuts has the above-described positional relationship, the force becomes a force in the counterclockwise direction with respect to the lock 40. The lock 40 is more reliably brought into contact with the locked portion 37b, and the lock 4
It only ensures a locked state of zero. Moreover,
The contact position Q of the lock 40, the second rotation shaft 25, and the rotation center O
The angle formed by the line segment connecting the
When 2 tries to rotate counterclockwise, a counterclockwise force acts on the lock 40 in the same manner as described above.
It is set so that the lock 40 is more surely brought into contact with the locked portion 37b to ensure the locked state by the lock 40.

Further, when unlocking the handcuff, the key 41 is inserted from the key insertion hole 38 and inserted into the engagement hole 42 of the lock 40, and the lock 40 is drawn as shown in FIG. Rotate clockwise. As a result, the locking portion 43 of the lock 40 contacts the engaged surface 37a of the cutout portion 36 of the lock body 32,
The lock 32 is rotated counterclockwise against the urging force of the leaf spring 34 to bring it to the state shown in FIG. At this time, the lock 40 rotates clockwise beyond the first concave surface 50 of the lock 40, and the elastic body 54 is compressed and deformed. In this state, the lock 32 is located outside the rotation trajectory of the gear 30, and the gear 30 can freely rotate. Then, the handcuffs are removed from the wrist by swinging the rotating body 10 in the unfolding direction.

According to the handcuffs of this embodiment, no matter which force is applied to the rotating body after locking, the position of the rotating body is reliably maintained and unnecessary force is not applied to the lock body 32 and the lock 40. ,
The position of the lock 32 is reliably maintained. Further, the key 41 is only inserted through the engagement hole 42 of the lock 40 to rotate the lock 40. Since the key 41 has a simple shape and is easy to operate, it is different from the related art. It won't break.

The lock and lock of the handcuff of the present invention can be set as appropriate, and the force acting on the lock is directed in the direction of the rotation axis due to its positional relationship.
The engagement portion with the lock may be such that the line of action of force is in the direction of the center of rotation and acts on the external force in a direction that strengthens the engagement.

[0022]

The handcuffs of the present invention have a simple structure and can enhance the strength of the handcuffs and reliably prevent malfunction. In particular, when a force to remove the rotating body is applied, the movement is surely blocked, and conversely, even when a force to reduce the diameter is applied, the swinging of the rotating body is surely blocked. Therefore, the diameter of the handcuff will not be carelessly reduced.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of a handcuff of the present invention.

FIG. 2 is a left side view of the male member of the handcuff of the first embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of the partially broken side showing a use state of the handcuff of the first embodiment of the present invention.

FIG. 4 is a cross-sectional view taken along the line AA showing the usage state of the locked body of the handcuff of the first embodiment of the present invention.

FIG. 5 is a cross-sectional view taken along the line AA showing the usage state of the unlocked state of the lock body of the handcuff of the first embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rotating body 12 Instrument housing section 14 Instrument housing 16 Tooth holes 24, 25 Rotating shaft 30 Gear wheel 32 Lock body 34 Spring member 40 Locker 43 Locking section

Claims (5)

[Claims] 1. An arc-shaped rotating body (10), a container housing (14) rotatably holding the rotating body (10), and the rotating body (14) formed by the container housing (14). A case (12) formed with a space into which the tip of (10) can be inserted.
A plurality of tooth holes (16) provided at the tip of the rotating body (10), and a gear (30) provided in the device casing part (12) and engaged with the tooth holes (16), This gear (3O)
A lock body (32) that engages with the lock body, a spring member (34) that biases the lock body (32) in the engagement direction, and a position where the lock body (32) engages with the gear (30). A lockable lock (40) is provided at a position retracted from the gear (30), and a line of action of a force acting on the lock body (32) generated with the rotation of the gear (30) is Almost the above tablets (3
Handcuffs provided facing the rotating shaft (25) of 2). 2. The lock body (3) is provided by the lock (40).
2) is locked at a position engaged with the gear (30), the contact position (Q) between the lock (40) and the lock body (32) is locked from the gear (30). The side opposite to the rotation axis (25) of the lock body (32) with respect to the line connecting the point of action (P) of the force acting on the body (32) and the rotation center (O) of the lock (40). The handcuffs of claim 1 located at. 3. A line segment connecting the rotation axis (25) of the lock body (32) with the contact position (Q) between the lock body (40) and the lock body (32) as a center, and the lock body. The handcuff according to claim 1, wherein an angle formed by a line segment connecting the rotation center (O) of (40) is 90 degrees or less. 4. The handcuff according to claim 2 or 3, wherein the locking portion (43) of the lock (40) is located in the notch (36) formed in the lock body (32). 5. The lock (40) is formed with an engagement hole (42) through which a key (41) is inserted, and the engagement hole (4) is formed.
The handcuff according to claim 4, wherein the lock (40) is swung by contacting the key (41) with the lock (2).