CN210291350U - Anti-drop safety device for handheld object - Google Patents

Abstract

The utility model discloses an anti-drop safety device for a hand-held object, which comprises an upper shell, a lower shell, a reel and a coil spring; the reel comprises an upper baffle disc, a lower baffle disc and a hollow column connecting the upper baffle disc and the lower baffle disc, wherein the centers of the upper baffle disc and the lower baffle disc are respectively provided with a first through hole, and the side wall of the hollow column is provided with a coil spring fixing hole; a first rotating column matched with the through hole is arranged on the inner bottom surface of the lower shell, and a coil spring clamping groove is longitudinally arranged on the first rotating column; a safety rope is wound on the outer surface of the hollow column in the clockwise direction, one end of the safety rope is fixedly connected with the reel, and the other end of the safety rope extends out of the upper shell or the lower shell and is connected with a quick-release buckle; the lower surface of lower casing is provided with wears the subassembly. The utility model discloses handheld thing anti-drop safety device dresses on the health, and the safety rope is connected with handheld thing, can prevent effectively that handheld thing from falling convenient to use carelessly, and the device has three kinds of modes of freedom, non return and locking, can also only change when drawing fast.

Description

Anti-drop safety device for handheld object

Technical Field

The utility model relates to a safety device field, concretely relates to handheld thing anti-drop safety device.

Background

In life, the hand-held object is often dropped carelessly. Especially, when the handheld object is expensive, the object can be lost greatly when being dropped carelessly, for example, a cameraman's camera, an unmanned aerial vehicle controller, and the accurate handheld object is dropped carelessly, and the accuracy is difficult to recover. Moreover, in the process of working at high altitude, the wrench and the pliers in the hands of the operator fall carelessly, which not only seriously affects the normal operation of the work, but also may injure people or objects.

Therefore, the stability and safety of the grip of the hand-held object are very important.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the main object of the utility model is to provide a handheld thing anti-drop safety device is connected handheld thing and handheld thing anti-drop safety device, can effectively prevent that handheld thing from falling, has avoided falling the thing and has wounded the thing.

In order to achieve the above purpose, the present invention adopts the following technical solution.

An anti-drop safety device for a handheld object comprises an upper shell, a lower shell, a winding wheel and a coil spring; the reel comprises an upper baffle disc, a lower baffle disc and a hollow column connecting the upper baffle disc and the lower baffle disc, wherein the centers of the upper baffle disc and the lower baffle disc are respectively provided with a first through hole, and the side wall of the hollow column is provided with a coil spring fixing hole; a first rotating column matched with the first through hole is arranged on the inner bottom surface of the lower shell, and a coil spring clamping groove is longitudinally formed in the first rotating column; a safety rope is wound on the outer surface of the hollow column in the clockwise direction, one end of the safety rope is fixedly connected with the reel, and the other end of the safety rope extends out of the upper shell or the lower shell and is connected with a quick-release hanging buckle; the reel is sleeved on the first rotating column through a first through hole, the inner end of the coil spring is connected with the coil spring clamping groove, the outer end of the coil spring is connected with the coil spring fixing hole, and the rotation direction of the coil spring is clockwise; the lower surface of lower casing is provided with wears the subassembly.

Further, the device also comprises a non-return ratchet wheel, a non-return pawl, a pawl fixing ring and a control disc; the non-return ratchet wheel is coaxially arranged on the upper surface of the upper baffle disc, and the ratchet of the non-return ratchet wheel inclines towards the counterclockwise direction; the pawl fixing ring is fixedly connected to the lower shell, the middle part of the non-return pawl is hinged to the pawl fixing ring, a first V-shaped compression elastic sheet is arranged between the tail part of the non-return pawl and the pawl fixing ring and used for pushing the tail part of the non-return pawl to enable the head part of the non-return pawl to abut against the ratchet of the non-return ratchet wheel; the center of the upper surface of the control panel is provided with a control panel hinge shaft, and the edge of the control panel extends downwards to form a first arc-shaped shifting sheet; the upper shell is provided with a second through hole matched with the control panel hinge shaft, and the control panel hinge shaft penetrates through the second through hole and is fixedly connected with a drive plate; and when the drive plate is rotated, and the first arc-shaped drive plate extrudes the tail part of the non-return pawl, the head part of the non-return pawl is separated from the ratchet teeth of the non-return ratchet wheel.

Further, the locking device also comprises a locking wheel and a locking claw; the locking wheel is fixedly connected to the upper surface of the non-return ratchet wheel, and a plurality of locking grooves are uniformly distributed in the circumferential direction of the locking wheel; the middle part of the locking claw is hinged to the pawl fixing ring, a second V-shaped compression elastic sheet is arranged between one side, far away from the locking wheel, of the head of the locking claw and the pawl fixing disc, and the second V-shaped compression elastic sheet is used for pushing the head of the locking claw to enable the head of the locking claw to abut against the locking wheel; a second arc-shaped shifting piece matched with the tail part of the locking claw is arranged at the edge of the control disc; and when the drive plate is rotated, the head part of the locking claw is separated from the locking groove of the locking wheel when the second arc-shaped drive plate extrudes the tail part of the locking claw.

Further, the upper surface of the drive plate is provided with a mode indicating mark, and the upper surface of the upper shell is provided with a free mode indicating mark, a non-return mode indicating mark and a locking mode indicating mark.

Furthermore, the speed limiting ratchet and the speed limiting pawl are also included; the speed limiting ratchet is arranged on the inner bottom surface of the lower shell and inclines towards the counterclockwise direction; the middle part of the speed-limiting pawl is hinged to the lower surface of the lower catch plate, and a tension spring is arranged between the tail part of the speed-limiting pawl and the lower catch plate; the head of the speed limiting pawl is close to the speed limiting ratchet by the tension spring.

Further, a time display is interposed between the upper and lower cases, the time display being located on a side portion of the reel.

Further, the wearing component is an elastic canvas wrist strap.

Further, the wearing assembly is a mechanical adjustable watchband.

Further, the safety rope is a flexible steel wire rope.

The utility model discloses technical scheme handheld thing anti-drop safety device dresses on the health, and the safety rope is connected with handheld thing, can prevent effectively that handheld thing from falling carelessly, has eliminated handheld thing and has fallen the potential safety hazard that causes, convenient to use. The device has three modes of freedom, non-return and locking, and can limit speed and stop rotation during quick traction.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is an exploded view of an embodiment of the anti-drop safety device of the present invention;

FIG. 2 is an assembly view of an embodiment of the anti-falling device for a handheld device of the present invention;

FIG. 3 is a perspective view of a reel of the anti-drop safety device of the utility model;

FIG. 4 is a front view of an embodiment of the anti-drop safety device of the present invention;

FIG. 5 is a cross-sectional view taken at A in FIG. 4 in a free mode of the anti-drop safety device of the present invention;

FIG. 6 is a cross-sectional view taken at A in FIG. 4 of the anti-drop safety device of the present invention in the non-return mode;

FIG. 7 is a cross-sectional view taken at A in FIG. 4 when the anti-drop safety device of the present invention is in the positioning mode;

FIG. 8 is a cross-sectional view of the anti-drop device at B in FIG. 4 when the device is in the non-speed-limiting position;

FIG. 9 is a cross-sectional view at B in FIG. 4 when the anti-drop safety device of the present invention is in a speed-limiting state;

in the above figures: 1, an upper shell; 101 a second via;

2, a lower shell; 201 a first spin column;

3 a reel; 301, an upper baffle disc; 302 a lower baffle disc; 303 a hollow column; 304 coil spring fixing holes;

4, a coil spring; 5, a safety rope; 6, quick-release hanging buckle; 7 wearing the component; 8, a non-return ratchet wheel; 9 a non-return pawl; 10 a pawl fixing ring;

11 controlling the disc; 1101 controlling a disc hinge shaft; 1102 a first arcuate paddle;

12 a first V-shaped compression spring; 13 a dial plate; 14, positioning a wheel; 15 positioning claws; 16 a second V-shaped compression spring; 17 a free mode indication flag; 18 check mode indicator; 19 a positioning mode indicator; 20 speed limiting ratchets; 21 speed limiting pawl; 22 a tension spring; 23 a time display; 24 position indication marks.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of other ways than those described herein, and those skilled in the art will be able to make similar generalizations without departing from the spirit of the invention. The invention is therefore not limited to the specific embodiments disclosed below.

Referring to fig. 1, 2 and 3, a hand-held object falling prevention safety device includes an upper case 1, a lower case 2, a reel 3 and a coil spring 4; the reel 3 comprises an upper catch plate 301, a lower catch plate 302 and a hollow column 303 connecting the upper catch plate 301 and the lower catch plate 302, wherein the centers of the upper catch plate 301 and the lower catch plate 302 are respectively provided with a first through hole, and the side wall of the hollow column 303 is provided with a coil spring fixing hole 304; a first rotating column 201 matched with the first through hole is arranged on the inner bottom surface of the lower shell 2, and a coil spring clamping groove is longitudinally arranged on the first rotating column 201; a safety rope 5 is wound on the outer surface of the hollow column 303 clockwise, one end of the safety rope 5 is fixedly connected with the reel 3, and the other end of the safety rope 5 extends out of the upper shell 1 or the lower shell 2 and is connected with a quick-release buckle 6; the reel 3 is sleeved on the first rotary column 201 through a first through hole, the inner end of the coil spring 4 is connected with the coil spring clamping groove, the outer end of the coil spring 4 is connected with the coil spring fixing hole 304, and the rotation direction of the coil spring 4 is clockwise; the lower surface of the lower shell 2 is provided with a wearing component 7.

In the above embodiment, the hand-held object falling prevention safety device includes the upper case 1, the lower case 2, the reel 3, and the coil spring 4; the inner end of the coil spring 4 is connected to the first rotary post 201 on the lower case 2, and the outer end of the coil spring 4 is connected to the coil spring fixing hole 304 of the hollow cylindrical shape of the reel 3. The safety rope 5 is wound on the reel 3, and the safety rope 5 is wound in a clockwise direction, the coil of the coil spring 4 being clockwise to the liquid chamber. During the use, be connected handheld thing and the quick detach of safety rope 5 and hang knot 6, fixed with human body through wearing subassembly 7 with handheld thing anti-drop safety device. When the hand-held object is far away from the human body, the safety rope 5 is pulled out, meanwhile, the coil spring 4 rotates clockwise to store energy, and when the hand-held object is close to the human body, the safety rope 5 automatically rotates to take up the rope under the restoring force of coil replacement. When the hand-held object falls carelessly, the reel 3 stops rotating when the safety rope 5 is completely put out, so that the hand-held object is suspended, and the hand-held object is prevented from falling. In the whole using process, the safety rope 5 can be taken at any time, and can be freely and conveniently taken for any length.

Further, referring to fig. 1, 4 and 5, a check ratchet 8, a check pawl 9, a pawl fixing ring 10 and a control disc 11 are further included; the non-return ratchet wheel 8 is coaxially arranged on the upper surface of the upper baffle disc 301, and the ratchet teeth of the non-return ratchet wheel 8 incline in the counterclockwise direction; the pawl fixing ring 10 is fixedly connected to the lower shell 2, the middle part of the non-return pawl 9 is hinged to the pawl fixing ring 10, a first V-shaped compression elastic sheet 12 is arranged between the tail part of the non-return pawl 9 and the pawl fixing ring, and the first V-shaped compression elastic sheet 12 is used for pushing the tail part of the non-return pawl 9 to enable the head part of the non-return pawl 9 to abut against the ratchet teeth of the non-return ratchet wheel 8; a control panel hinge shaft 1101 is arranged at the center of the upper surface of the control panel 11, and the edge of the control panel 11 extends downwards to form a first arc-shaped shifting sheet 1102; a second through hole 101 matched with the control panel hinge shaft 1101 is formed in the upper shell 1, and the control panel hinge shaft 1101 penetrates through the second through hole 101 and is fixedly connected with a dial 13; when the dial 13 is rotated and the first arc-shaped pulling piece 1102 presses the tail part of the check pawl 9, the head part of the check pawl 9 is separated from the ratchet teeth of the check ratchet wheel 8.

In the above embodiment, it is preferable that the check ratchet 8 is fixedly provided on the upper surface of the upper catch plate 301 of the reel 3, the pawl fixing ring 10 is fixedly attached to the lower case 2, and the middle portion of the check pawl 9 is hinged to the pawl fixing ring 10. A first V-shaped compression elastic sheet 12 is arranged between the tail of the non-return pawl 9 and the pawl fixing disc, and the head of the non-return pawl 9 abuts against the ratchet of the non-return ratchet wheel 8 under the action of the first V-shaped compression elastic sheet 12.

A control panel 11 is hinged on the upper shell 1, and a first downward arc-shaped shifting piece 1102 is arranged at the edge of the control panel 11.

Rotating the control disc 11, the head of the non-return pawl 9 is disengaged from the ratchet teeth of the non-return ratchet wheel 8 when the first arc shaped paddle 1102 presses on the tail of the non-return pawl 9. The safety rope 5 is in a freely retractable state.

When the control disc 11 is rotated, when the first arc-shaped shifting piece 1102 does not extrude the tail part of the check pawl 9, the head part of the check pawl 9 is meshed with the ratchet of the check ratchet wheel 8 under the action of the first V-shaped compression elastic piece 12, and the reel 3 can only rotate clockwise in a single direction, namely the safety rope 5 can only be released and cannot be recovered.

Further, referring to fig. 1, 4 and 6, a locking wheel 14 and a locking claw 15 are further included; the locking wheel 14 is fixedly connected to the upper surface of the non-return ratchet wheel 8, and a plurality of locking grooves are uniformly distributed on the locking wheel 14 in the circumferential direction; the middle part of the locking claw 15 is hinged to the pawl fixing ring 10, a second V-shaped compression spring piece 16 is arranged between one side, far away from the locking wheel 14, of the head of the locking claw 15 and the pawl fixing disc, and the second V-shaped compression spring piece 16 is used for pushing the head of the locking claw 15 to enable the head of the locking claw 15 to abut against the locking wheel 14; a second arc-shaped shifting piece matched with the tail part of the locking claw 15 is arranged at the edge of the control disc 11; when the dial 13 is rotated and the second arc-shaped plectrum presses the tail part of the locking claw 15, the head part of the locking claw 15 is separated from the locking groove of the locking wheel 14.

In the above embodiment, referring to fig. 1, 4 and 6, as well as the principle of the check ratchet 8 and the check pawl 9, the locking wheel 14 is fixedly connected to the upper surface of the check ratchet 8, and the middle portion of the locking pawl 15 is hinged to the pawl fixing ring 10. A second V-shaped compression spring piece 16 is arranged between one side of the locking claw 15 far away from the locking wheel 14 and the pawl fixing ring 10. Normally, the second V-shaped compression spring 16 presses the locking pawl 15 to make the head of the locking pawl 15 abut against the lower wheel, and when the locking wheel 14 rotates, the locking pawl 15 can be clamped into the locking groove of the locking wheel 14 to prevent the reel 3 from rotating continuously.

The edge of the control panel 11 extends downwards to form a second arc-shaped shifting piece. When the control disc 11 is rotated and the second arc-shaped plectrum is pressed on the tail part of the locking claw 15, the head part of the locking claw 15 is separated from the locking groove of the locking wheel 14. The reel 3 is unlocked and unlocked.

When the second arc-shaped shifting piece does not press the tail part of the locking claw 15, the head part of the locking claw 15 is clamped into the locking groove of the locking wheel 14 under the action of the second V-shaped compression spring piece 16 of the locking claw 15, and the reel 3 is in a locking state.

In this embodiment, the preferred non-return pawl 9 is disposed in close proximity to the locking pawl 15 so that the first arcuate finger 1102 and the second arcuate finger 1102 are joined together and merge into the first arcuate finger 1102.

In this embodiment, there are three use states, which are: a free mode, a check mode, and a locked mode.

Referring to fig. 4 and 5, fig. 5 shows the engagement relationship of the first arc-shaped paddle 1102, the check pawl 9 and the locking pawl 15 in the free mode. When the first arc-shaped paddle 1102 presses simultaneously against the rear portions of the check pawl 9 and the locking pawl 15, the check pawl 9 is disengaged from the check ratchet wheel 8, and the locking pawl 15 is disengaged from the locking wheel 14. The reel 3 can rotate clockwise or anticlockwise, and the safety rope 5 can be freely retracted; according to the mode, the amount of the safety rope 5 is used, the redundant safety rope 5 is timely recovered, and the safety rope 5 cannot be swung to interfere operation due to the allowance at hand. In addition, it is also suitable to withdraw the safety line 5 after use.

Referring to fig. 4 and 6, fig. 6 shows the meshing relationship of the first arc-shaped paddle 1102, the non-return pawl 9 and the locking pawl 15 in the check mode. When the first arc-shaped paddle 1102 presses only on the tail of the locking pawl 15, the check pawl 9 engages with the check ratchet wheel 8, and the locking pawl 15 is separated from the locking wheel 14. At this time, the reel 3 can be rotated clockwise, and the safety rope 5 can be released and retracted. The mode safety rope 5 can release redundant allowance, the operation of workers is flexible, the safety rope does not need to be repeatedly drawn, and the falling of hand-held objects such as a wrench and a pliers can be prevented.

Referring to fig. 4 and 7, fig. 7 shows the engagement relationship of the first arc-shaped paddle 1102, the check pawl 9 and the locking pawl 15 in the locking mode. When the first arc-shaped paddle 1102 is not pressed against either the check pawl 9 or the tail of the locking pawl 15, the check pawl 9 engages with the check ratchet wheel 8 and the locking pawl 15 engages with the locking wheel 14. At this time, the reel 3 is fixed, and the length of the safety rope 5 paid out is fixed. After use, the safety rope 5 can be recovered by pushing the first arc-shaped shifting piece 1102 to press the tail parts of the check pawl 9 and the locking claw 15.

Further, referring to fig. 1, an upper surface of the dial 13 is provided with a mode indicator 24, and an upper surface of the upper housing 1 is provided with a free mode indicator 17, a check mode indicator 18, and a lock mode indicator 19.

In the above embodiment, in order to facilitate knowing the positional relationship between the first arc-shaped dial piece of the control dial 11 and the non-return ratchet 8 and the locking wheel 14, the mode indicator 24 is disposed on the upper surface of the dial 13, and the free mode indicator 17, the non-return mode indicator 18 and the locking mode indicator 19 are disposed on the upper surface of the upper housing 1. In order to determine which mode the anti-drop device is in, the dial 13 may be rotated to direct the mode indicator 24 to the corresponding indicator.

Further, referring to fig. 1, a speed limiting ratchet 20 and a speed limiting pawl 21 are further included; the speed-limiting ratchet 20 is arranged on the inner bottom surface of the lower shell 2, and the speed-limiting ratchet 20 inclines towards the counterclockwise direction; the middle part of the speed-limiting pawl 21 is hinged to the lower surface of the lower catch plate 302, and a tension spring 22 is arranged between the tail part of the speed-limiting pawl 21 and the lower catch plate 302; the tension spring 22 makes the head of the speed limiting pawl 21 close to the speed limiting ratchet 20.

Referring to FIG. 8, FIG. 8 is a cross-sectional view at B of the device in the non-speed limiting position; in this embodiment, a speed-limiting pawl 21 is hinged to the bottom of the reel 3, a speed-limiting ratchet 20 is correspondingly arranged on the inner bottom surface of the lower shell 2, the inclination direction of the speed-limiting ratchet 20 is counterclockwise, and the first section of the speed-limiting pawl 21 is longer than the tail section of the limiting pawl. A tension spring 22 is arranged between the tail part of the speed-limiting pawl 21 and the lower shell 2, and the length of the tension spring 22 just enables the head part of the speed-limiting pawl 21 to be separated from the speed-limiting ratchet 20.

Referring to fig. 9, fig. 9 is a sectional view at B of the hand piece fall prevention safety device in a speed limiting state; in practical use, the hand-held object suddenly drops from the hand of a worker, the safety rope 5 is pulled at a high speed, the reel 3 rotates clockwise, the head of the speed-limiting pawl 21 hinged to the speed-limiting pawl 21 is subjected to centrifugal force, the centrifugal force applied to the head of the speed-limiting pawl 21 is larger than the centrifugal force applied to the tail of the speed-limiting pawl 21, the head of the speed-limiting pawl 21 rotates in a direction far away from the rotating shaft, and the speed-limiting pawl 21 is meshed with the speed-limiting ratchet 20 to prevent the reel 3. This embodiment can effectively prevent the reel 3 from releasing the safety cord 5 to prevent a danger from occurring in the event that the hand-held object is subjected to a rapid abnormal external force.

Further, a time display 23 is interposed between the upper case 1 and the lower case 2, the time display 23 being located on a side portion of the reel 3.

In the above embodiment, the time display 23 is provided on the side of the reel 3, so that it is more convenient for the high-altitude operator to know the time without drawing out the watch or the cellular phone from the pocket to check the time.

Further, the wearing component 7 is an elastic canvas wrist strap. Similarly, wear subassembly 7 and can also be the adjustable watchband of mechanical type by reference to the design of wrist-watch wrist strap.

Further, the safety rope 5 is a flexible steel wire rope. In this embodiment, flexible steel wire is preferred to flexible anticreep rope, and flexible steel wire is not nearly toughness good, is convenient for crooked, still has reliable intensity.

Although the invention has been described in detail in this specification with reference to specific embodiments and illustrative embodiments, it will be apparent to those skilled in the art that certain changes and modifications can be made therein without departing from the scope of the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (9)

1. An anti-drop safety device for a handheld object is characterized by comprising an upper shell (1), a lower shell (2), a winding wheel (3) and a coil spring (4);

the reel (3) comprises an upper catch plate (301), a lower catch plate (302) and a hollow column (303) connecting the upper catch plate (301) and the lower catch plate (302), wherein the centers of the upper catch plate (301) and the lower catch plate (302) are respectively provided with a first through hole, and the side wall of the hollow column (303) is provided with a coil spring fixing hole (304);

a first rotating column (201) matched with the first through hole is arranged on the inner bottom surface of the lower shell (2), and a coil spring clamping groove is longitudinally formed in the first rotating column (201);

a safety rope (5) is wound on the outer surface of the hollow column (303) in the clockwise direction, one end of the safety rope (5) is fixedly connected with the reel (3), and the other end of the safety rope extends out of the upper shell (1) or the lower shell (2) and is connected with a quick-release buckle (6);

the reel (3) is sleeved on the first rotary column (201) through a first through hole, the inner end of the coil spring (4) is connected with the coil spring clamping groove, the outer end of the coil spring (4) is connected with the coil spring fixing hole (304), and the rotation direction of the coil spring (4) is clockwise;

the lower surface of the lower shell (2) is provided with a wearing component (7).

2. The anti-drop safety device for the handhold according to claim 1, further comprising a check ratchet wheel (8), a check pawl (9), a pawl fixing ring (10) and a control disc (11);

the check ratchet wheel (8) is coaxially arranged on the upper surface of the upper baffle disc (301), and the ratchet teeth of the check ratchet wheel (8) incline in the anticlockwise direction;

the pawl fixing ring (10) is fixedly connected to the lower shell (2), the middle part of the non-return pawl (9) is hinged to the pawl fixing ring (10), a first V-shaped compression elastic sheet (12) is arranged between the tail part of the non-return pawl (9) and the pawl fixing ring, and the first V-shaped compression elastic sheet (12) is used for pushing the tail part of the non-return pawl (9) to enable the head part of the non-return pawl (9) to abut against the ratchet of the non-return ratchet (8);

a control panel hinge shaft (1101) is arranged at the center of the upper surface of the control panel (11), and the edge of the control panel (11) extends downwards to form a first arc-shaped shifting sheet (1102); a second through hole (101) matched with the control panel hinge shaft (1101) is formed in the upper shell (1), and the control panel hinge shaft (1101) penetrates through the second through hole (101) and is fixedly connected with a drive plate (13);

and when the first arc-shaped shifting piece (1102) presses the tail part of the check pawl (9), the head part of the check pawl (9) is separated from the ratchet teeth of the check ratchet wheel (8) by rotating the driving plate (13).

3. A hand piece fall prevention safety device according to claim 2, further comprising a locking wheel (14) and a locking pawl (15);

the locking wheel (14) is fixedly connected to the upper surface of the non-return ratchet wheel (8), and a plurality of locking grooves are uniformly distributed in the circumferential direction of the locking wheel (14);

the middle part of the locking claw (15) is hinged to the pawl fixing ring (10), a second V-shaped compression spring sheet (16) is arranged between one side, far away from the locking wheel (14), of the head of the locking claw (15) and the pawl fixing disc, and the second V-shaped compression spring sheet (16) is used for pushing the head of the locking claw (15) to enable the head of the locking claw (15) to abut against the locking wheel (14);

a second arc-shaped shifting piece matched with the tail part of the locking claw (15) is arranged at the edge of the control disc (11);

and when the drive plate (13) is rotated and the second arc-shaped drive plate extrudes the tail part of the locking claw (15), the head part of the locking claw (15) is separated from the locking groove of the locking wheel (14).

4. A hand-held object falling prevention safety device according to claim 3, wherein the upper surface of the dial (13) is provided with a mode indicator (24), and the upper surface of the upper housing (1) is provided with a free mode indicator (17), a non-return mode indicator (18) and a lock mode indicator (19).

5. The anti-drop safety device for handholds as claimed in claim 1, characterized in that the device further comprises a speed-limiting ratchet (20) and a speed-limiting pawl (21);

the speed-limiting ratchet (20) is arranged on the inner bottom surface of the lower shell (2), and the speed-limiting ratchet (20) inclines towards the counterclockwise direction;

the middle part of the speed-limiting pawl (21) is hinged to the lower surface of the lower catch plate (302), and a tension spring (22) is arranged between the tail part of the speed-limiting pawl (21) and the lower catch plate (302); the head of the speed-limiting pawl (21) is close to the speed-limiting ratchet (20) through the tension spring (22).

6. A hand-held object fall prevention safety device according to claim 1, characterized in that a time display (23) is interposed between the upper case (1) and the lower case (2), the time display (23) being located on the side of the reel (3).

7. A handpiece fall-off prevention safety device according to claim 1, wherein the wearing assembly (7) is an elastic canvas wristband.

8. A hand-piece fall-off prevention safety device according to claim 1, wherein the wearing component (7) is a mechanical adjustable watch band.

9. A handset fall-off prevention safety device according to claim 1, wherein the safety line (5) is a flexible steel wire rope.

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