CN110331905B - Anti-theft chain device - Google Patents

Abstract

The invention discloses an anti-theft chain device, comprising a hinge seat and a fixed seat. A first connecting plate is hinged on the upper end of a vertical plate in the hinge seat, and a second connecting plate is hinged on the end of the first connecting plate away from the hinge seat. A plug sleeve is provided on the lower end surface of one end of the connecting plate away from the first connecting plate, a groove is set in the fixing seat, at least two plug mechanisms are set on the side wall of the plug sleeve, and an annular slot is set on the inner peripheral wall of the groove , a push rod is slid up and down in the second connecting plate, a cover is threadedly connected to the lower end of the insert sleeve, a reset mechanism is arranged between the push rod and the cover, and a sleeve is arranged on the upper end surface of the second connecting plate There is a pressure plate connected inside the sleeve, a pair of sliders are arranged on the outer side wall of the pressure plate, a sliding cavity is arranged on the inner wall of the sleeve, the side wall of the lower end of the sliding cavity is arranged with an insert groove, and the inner wall of the upper end of the sleeve is threaded A retaining ring is connected, and a convex rib is arranged on the upper end surface of the pressure plate; compared with the traditional anti-theft chain device, the present invention improves the anti-theft effect.

Description

Anti-theft chain device

technical field

The invention belongs to the technical field of anti-theft devices, and relates to an anti-theft chain device.

Background technique

At present, an anti-theft chain device is generally installed on the door of a hotel. Currently, the anti-theft chain device installed on the door of a hotel generally includes a first fixed seat and a second fixed seat. The first fixed seat is fixed on the door frame, and the second fixed seat is fixed on the door frame. The seat is fixed on the door body, the first fixing seat is fixedly connected with a chain, the end of the chain away from the first fixing seat is provided with a lock, and the second fixing seat is provided with a lock slot for locking with the lock, but When the anti-theft chain is used, the length of the lock chain is generally longer in order to allow the lock to enter the lock slot. Open a certain angle, so that criminals can still break the anti-theft chain device, there is a big safety hazard.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention designs an anti-theft chain device. When the anti-theft chain device is in use, after the hinge seat is fixed with the door frame and the fixed seat is fixed with the door body, the socket on the second connecting plate can be inserted into the In the groove of the fixed seat, in this way, the first connecting plate and the second connecting plate between the hinge seat and the socket have no extra length for the door to be opened. Compared with the traditional anti-theft chain device, the anti-theft is improved. Effect.

The object of the present invention is achieved in this way:

The anti-theft chain device of the present invention includes a hinge seat for fixing with the door frame and a fixing seat for fixing with the door body. The upper end of the vertical plate in the hinge seat is hinged with a first connecting plate, and the first connecting plate is far from the hinge seat. One end is hinged with a second connecting plate, the lower end surface of one end of the second connecting plate away from the first connecting plate is provided with a plug sleeve, a groove for inserting the plug sleeve is arranged in the fixing seat, and at least a side wall of the plug sleeve is provided with a groove for inserting the plug sleeve. There are two bolt mechanisms evenly distributed along the circumferential direction of the plug sleeve. The inner peripheral wall of the groove is provided with an annular slot that can be locked with the bolt mechanism. A push rod that locks or unlocks the plug mechanism and the annular slot, the lower end of the plug sleeve is threadedly connected with a cover, and a reset mechanism for driving the push rod to reset after the push rod moves downward is arranged between the push rod and the cover , the upper end surface of the second connecting plate is provided with a sleeve sleeved on the outside of the push rod, the inside of the sleeve is slidably connected with a pressure plate for pressing down and locking the push rod, and a pressure plate is arranged on the outer side wall of the pressure plate. For the sliding block, the inner wall of the sleeve is provided with a sliding cavity for the sliding block to slide, and the side wall of the lower end of the sliding cavity is provided with an embedded groove which is communicated with the sliding cavity and can be embedded after the sliding block is rotated. The inner wall is threadedly connected with a retaining ring for blocking the pressure plate to prevent the pressure plate from falling out of the sleeve, and the upper end surface of the pressure plate is provided with a raised rib which can be grasped by hand to facilitate the rotation of the pressure plate.

In the anti-theft chain device of the present invention, the latch mechanism includes a chute located on the side wall of the insert sleeve, the chute is slidably provided with an insertion rod, and the outer peripheral wall of the insertion rod located in the chute is provided with a slide The groove is fitted with a sliding annular boss, the outer end of the chute is threadedly connected with an end cover for blocking the annular boss to prevent the insertion rod from leaving the chute, and the outer end of the insertion rod moves through the end cover and is inserted into the annular slot Among them, the insert rod between the end cover and the annular boss is sheathed with a first spring for driving the annular boss and the insert rod to move to make the insert rod leave the annular slot, and the outer peripheral wall of the push rod located inside the insert sleeve is provided with a first spring. There is an annular limit groove, and the inner end of the insertion rod is inserted into the annular limit groove after moving through the insertion sleeve. The inclined surface cooperates with the inner side wall of the annular limit groove to slide, and the inclined surface is in close contact with the inner side wall of the annular limit groove; after adopting this structure, when the push rod moves down, the insertion rod is under the action of the first spring. The inclined surface slides with the annular limit slot, and the insertion rod gradually withdraws from the annular slot. When the insertion rod slides to the top of the annular limit groove, the insertion rod completely withdraws from the annular slot, realizing the insertion and fixation. To unlock the seat, when the push rod moves upward, the inclined surface cooperates with the annular limit groove to slide, the first spring is compressed at this time, and the insertion rod is gradually inserted into the annular slot, thereby realizing the locking of the insertion sleeve and the fixed seat. .

In the anti-theft chain device of the present invention, a pair of projections are arranged on the outer peripheral wall of the annular boss, and a pair of slideways are arranged on the inner wall of the chute, which can respectively cooperate with one of the projections to slide; by adopting this structure, after , the circumferential limit of the insertion rod can be realized, so that the phenomenon of circumferential rotation of the insertion rod can be avoided.

In the anti-theft chain device of the present invention, the outer end of the insertion rod is provided with an annular guide surface that can cooperate with the inner wall of the annular slot to guide the insertion rod into the annular slot conveniently; The rod can be easily inserted into the slot.

In the anti-theft chain device of the present invention, the upper and lower side walls of the open end of the annular slot are provided with arc surfaces that can be guided with the outer end of the insertion rod to facilitate the insertion of the insertion rod into the annular slot; Through the setting of the curved surface, the insertion rod can be easily inserted into the annular slot.

In the anti-theft chain device of the present invention, the reset mechanism includes a second spring located between the cover and the push rod, the lower end of the push rod is provided with a first blind hole into which the upper end portion of the second spring can be inserted, and the upper end of the cover is provided with a first blind hole. The end face is provided with a second blind hole into which the lower end portion of the second spring can be inserted; by adopting this structure, the second spring can reliably push the push rod upward to reset the push rod.

In the anti-theft chain device of the present invention, the outer side wall of the lower end of the cover is provided with an annular rounded surface that can cooperate and guide with the inner side wall of the groove; by adopting this structure, the end cover can enter the groove more conveniently middle.

In the anti-theft chain device of the present invention, several reinforcing blocks are fixed on both sides of the vertical plate in the hinge seat and before the bottom plate of the hinge seat; the arrangement of the reinforcing blocks can improve the structural strength between the vertical plate and the bottom plate.

In the anti-theft chain device of the present invention, a plurality of first bolt holes are arranged on the bottom plate of the hinge seat, and a plurality of second bolt holes are arranged on the fixed seat; The seat is fixed on the door frame, and the fixing seat can be conveniently fixed on the door body through the arrangement of the second bolt holes.

After the present invention adopts the above structure, during use, after the hinge seat is fixed with the door frame, and the fixed seat is fixed with the door body, the socket on the second connecting plate can just be inserted into the groove of the fixed seat. The first connecting plate and the second connecting plate between the hinge base and the socket have no extra length for the door to be opened, which improves the anti-theft effect compared with the traditional anti-theft chain device.

Description of drawings

Fig. 1 is the partial sectional structure schematic diagram of the present invention;

Fig. 2 is the enlarged structural representation at A place in Fig. 1;

Fig. 3 is the sectional structure schematic diagram of the second connecting plate;

FIG. 4 is a schematic top view of the structure of the present invention.

Detailed ways

The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

An anti-theft chain device includes a hinge base 1 for fixing with a door frame and a fixing base 2 for fixing with a door body. The upper end of the vertical plate 11 in the hinge base 1 is hinged with a first connecting plate 15. The first connecting plate One end of 15 away from the hinge seat 1 is hinged with the second connecting plate 3, the lower end surface of the second connecting plate 3 away from the first connecting plate 15 is provided with a socket 31, and the fixed seat 2 is provided with a socket for the socket 31 to be inserted. In the groove 21, the side wall of the plug sleeve 31 is provided with at least two plug mechanisms uniformly distributed along the circumferential direction of the plug sleeve 31, and the inner peripheral wall of the groove 21 is provided with an annular slot 22 that can cooperate and lock with the plug mechanism. The second connecting plate 3 is slidably provided with a push rod 4 for driving the latch mechanism to lock or unlock the latch mechanism and the annular slot 22. The lower end of the plug sleeve 31 is threadedly connected with a cover 32. The push rod 4 A reset mechanism for driving the push rod 4 to reset after the push rod 4 moves downward is provided between the cover 32 and the second connecting plate 3. The upper end surface of the second connecting plate 3 is provided with a sleeve 33 sleeved on the outside of the push rod 4, The inside of the sleeve 33 is slidably connected with a pressure plate 5 for pressing down and locking the push rod 4. A pair of sliding blocks 51 are arranged on the outer side wall of the pressure plate 5, and a pair of sliding blocks 51 are arranged on the inner wall of the sleeve 33 for the sliding block. 51 sliding sliding cavity 34, the side wall of the lower end of the sliding cavity 34 is provided with a socket 35 that communicates with the sliding cavity 34 and can be inserted into the sliding block 51 after rotation, and the inner wall of the upper end of the sleeve 33 is threadedly connected The plate 5 is used to prevent the pressure plate 5 from coming out of the sleeve 33. The retaining ring 6 is provided on the upper end surface of the pressure plate 5 with a raised rib 52 that can be grasped by hand to facilitate the rotation of the pressure plate 5; The chute 36 on the wall, the insertion rod 71 is slidably penetrated in the chute 36, and the outer peripheral wall of the insertion rod 71 in the chute 36 is provided with an annular boss 711 that can cooperate and slide with the chute 36, the sliding The outer end of the slot 36 is screwed with an end cover 72 for blocking the annular boss 711 to prevent the insertion rod 71 from being separated from the chute 36. The outer end of the insertion rod 71 penetrates the end cover 72 and is inserted into the annular slot 22 , the insertion rod 71 between the end cover 72 and the annular boss 711 is externally sheathed with a first spring 73 for driving the annular boss 711 and the insertion rod 71 to move to make the insertion rod 71 disengage from the annular slot 22, located inside the insertion sleeve 31 The outer peripheral wall of the push rod 4 is provided with an annular limit groove 41, the inner end of the insertion rod 71 is inserted into the annular limit groove 41 after moving through the insertion sleeve 31, and the inner side wall of the annular limit groove 41 gradually increases from bottom to top Retracted inward, the inner end of the insertion rod 71 is provided with a slope 712 that can cooperate with the inner side wall of the annular limit groove 41 to slide, and the slope 712 is in close contact with the inner side wall of the annular limit groove 41; after adopting this structure , When the push rod moves down, the plunger will slide with the annular limit groove under the action of the first spring, and the plunger will gradually withdraw from the annular slot. When the plunger slides to the top of the annular limit groove When the push rod moves upwards, the inclined surface cooperates with the annular limit groove to slide, and the first spring is compressed, and the insertion rod gradually moves upward. insert into ring A pair of projections 713 are arranged on the outer peripheral wall of the annular boss 711, and a pair of projections 713 are arranged on the inner wall of the chute 36, respectively, which can cooperate with one of the projections 713. A pair of sliding slides 37; by adopting this structure, the circumferential limit of the insertion rod can be realized, so that the phenomenon of circumferential rotation of the insertion rod can be avoided; the outer end of the insertion rod 71 is provided with There is an annular guide surface 714 that can cooperate with the inner wall of the annular slot 22 to facilitate the insertion of the insertion rod 71 into the annular slot 22; through the arrangement of the annular guide surface, the insertion rod can be easily inserted into the slot; the annular slot The upper side wall and the lower side wall of the open end of 22 are provided with an arc surface 23 that can be guided with the outer end of the insertion rod 71 to facilitate the insertion of the insertion rod 71 into the annular slot 22; The insertion rod can be easily inserted into the annular slot; the reset mechanism includes a second spring 8 located between the cover 32 and the push rod 4, and the lower end of the push rod 4 is provided with a first part for inserting the upper end portion of the second spring 8. A blind hole 42, the upper end surface of the cover 32 is provided with a second blind hole 38 into which the lower end portion of the second spring 8 can be inserted; the elastic force of the second spring in the present invention is greater than that of the first spring; by using this After this structure, the second spring can reliably push the push rod upward to make the push rod reset; the outer side wall of the lower end of the cover 32 is provided with an annular rounded surface 39 that can cooperate and guide with the inner side wall of the groove 21; After the structure, the end cover can enter the groove more conveniently; several reinforcing blocks 13 are fixed on both sides of the vertical plate 11 in the hinge seat 1 and before the bottom plate 12 of the hinge seat 1; The structural strength between the vertical plate and the bottom plate; the bottom plate 12 of the hinge seat 1 is provided with a number of first bolt holes 14, and the fixed seat 2 is provided with a number of second bolt holes 24; The hinge seat is conveniently fixed on the door frame by bolts, and the fixing seat can be conveniently fixed on the door body through the arrangement of the second bolt holes; when the present invention is used, the hinge seat and the door frame are fixed by bolts, and the bolts are used to fix the hinge seat and the door frame. The fixing seat is fixed with the door body; the working principle of the present invention is: when the second connecting plate and the fixing seat need to be unlocked, the pressure plate is pressed down, and when the bottoms of the slider slideways on both sides of the pressure plate are rotated, the pressure plate is rotated to make the The slider is embedded in the insert groove, at this time the push rod is pressed down, and after the push rod is pressed down, the insertion rod is under the action of the first spring, and under the action of the inclined surface and the annular limit groove sliding together, the insertion rod gradually increases. withdrawing from the annular slot, unlocking the second connecting plate and the fixed seat, and then turning the first connecting plate and the second connecting plate apart, and the door can be opened; when the second connecting plate needs to be connected When the plate is locked with the fixed seat, rotate the first connecting plate and the second connecting plate, so that the insert sleeve is inserted into the groove of the fixed seat, and then rotate the pressure plate to make the slider come out of the insert groove. Under the action of the push rod, the slider moves up along the sliding cavity, and the pressure plate finally abuts against the retaining ring. At this time, the push rod moves upward, and the first spring is compressed under the action of the inclined surface and the annular limit groove sliding together. , the plunger is gradually inserted into the annular slot, the locking of the second connecting plate and the fixing base is realized.

It should be noted that in the above embodiments, as long as the technical solutions that are not contradictory can be arranged and combined, those skilled in the art can exhaust all possibilities based on the mathematical knowledge of the arrangement and combination. The solutions are described one by one, but it should be understood that the technical solutions after the arrangement and combination have been disclosed by the present invention.

It should be noted that the above enumeration is only a specific embodiment of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible.

In a word, all deformations that those of ordinary skill in the art can directly derive or associate from the disclosed content of the present invention should be considered as the protection scope of the present invention.

Claims (9)

1. An anti-theft chain device, comprising a hinge seat (1) for fixing with a door frame and a fixing seat (2) for fixing with a door body, the upper end of a vertical plate (11) in the hinge seat (1) A first connecting plate (15) is hingedly connected, and a second connecting plate (3) is hinged at one end of the first connecting plate (15) away from the hinge seat (1), characterized in that: the second connecting plate (3) A socket (31) is provided on the lower end face of one end away from the first connecting plate (15), and a groove (21) into which the socket (31) can be inserted is provided in the fixing seat (2). The side wall of (31) is provided with at least two latch mechanisms uniformly distributed along the circumferential direction of the insert sleeve (31), and the inner peripheral wall of the groove (21) is provided with an annular slot that can be locked with the latch mechanism. (22), the second connecting plate (3) is slidably provided with a push rod (4) for driving the latch mechanism to lock or unlock the latch mechanism and the annular slot (22). A cover (32) is threadedly connected to the lower end of the sleeve (31), and between the push rod (4) and the cover (32), there is a space between the push rod (4) and the cover (32) for driving the push rod (4) after the push rod (4) moves downward In the reset mechanism for reset, the upper end surface of the second connecting plate (3) is provided with a sleeve (33) sleeved on the outside of the push rod (4), and the inside of the sleeve (33) can be slidably connected up and down. A pair of sliders (51) are arranged on the outer side wall of the pressure plate (5), and the inner wall of the sleeve (33) is arranged with A sliding cavity (34) for sliding the slider (51), the side wall of the lower end of the sliding cavity (34) is provided with an inlay that communicates with the sliding cavity (34) and can be embedded after the sliding block (51) is rotated a groove (35), a retaining ring (6) for blocking the pressure plate (5) to prevent the pressure plate (5) from coming out of the sleeve (33) is threaded on the inner wall of the upper end of the sleeve (33). The upper end surface of the pressure plate (5) is provided with a convex rib (52) which can be grasped by hand to facilitate the rotation of the pressure plate (5). 2. The anti-theft chain device according to claim 1, characterized in that, the latch mechanism comprises a chute (36) located on the side wall of the insert sleeve (31), and the chute (36) slidably passes through the chute (36). An insertion rod (71) is provided, and the outer peripheral wall of the insertion rod (71) located in the chute (36) is provided with an annular boss (711) that can cooperate and slide with the chute (36), the chute (36) ) is screwed with an end cap (72) for blocking the annular boss (711) to prevent the insertion rod (71) from disengaging from the chute (36), and the outer end of the insertion rod (71) moves through the The end cover (72) is then inserted into the annular slot (22), and the insertion rod (71) between the end cover (72) and the annular boss (711) is sheathed with an outer sleeve for driving the annular boss (711) and The insertion rod (71) moves so that the insertion rod (71) is separated from the first spring (73) of the annular slot (22), and an annular limit is provided on the outer peripheral wall of the push rod (4) inside the insertion sleeve (31). A groove (41), the inner end of the insertion rod (71) is inserted into the annular limit groove (41) after moving through the insertion sleeve (31), and the inner side wall of the annular limit groove (41) is from bottom to top Gradually shrink inward, the inner end of the insertion rod (71) is provided with a slope (712) that can cooperate with the inner side wall of the annular limit groove (41) to slide, and the slope (712) is connected to the annular limit groove. The inner side wall of (41) is close to each other. 3. The anti-theft chain device according to claim 2, wherein a pair of projections (713) are provided on the outer peripheral wall of the annular boss (711), and a pair of projections (713) are provided on the inner wall of the chute (36) A pair of slideways (37) which can cooperate and slide with one of the protruding blocks (713) respectively. 4. The anti-theft chain device according to claim 2 or 3, wherein the outer end of the insertion rod (71) is provided with a guide that can cooperate with the inner wall of the annular slot (22) to facilitate the insertion rod (71). 71) Annular guide surface (714) inserted into annular slot (22). 5. The anti-theft chain device according to claim 2 or 3, characterized in that, the upper and lower side walls of the open end of the annular slot (22) are provided with outer ends that are compatible with the insertion rod (71). The part is fitted with a guide to facilitate the insertion of the plunger (71) into the arcuate surface (23) of the annular slot (22). 6. The anti-theft chain device according to claim 1, wherein the reset mechanism comprises a second spring (8) located between the cover (32) and the push rod (4), the push rod (4) ) is provided with a first blind hole (42) into which the upper end portion of the second spring (8) can be inserted, and the upper end surface of the cover (32) is provided with a lower end portion for the second spring (8) Insert the second blind hole (38). 7. The anti-theft chain device according to claim 1, characterized in that, the outer side wall of the lower end of the cover (32) is provided with an annular rounded surface (39) that can cooperate and guide with the inner side wall of the groove (21). ). 8 . The anti-theft chain device according to claim 1 , wherein several pieces are fixed before the two sides of the vertical plate ( 11 ) in the hinge seat ( 1 ) and the bottom plate ( 12 ) of the hinge seat ( 1 ). 9 . Reinforcing block (13). 9 . The anti-theft chain device according to claim 1 , wherein a plurality of first bolt holes ( 14 ) are provided on the bottom plate ( 12 ) of the hinge base ( 1 ). Several second bolt holes (24) are provided.

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