Crown breaking pliers

Abstract

The utility model provides crown breaking forceps, and relates to the technical field of medical instruments. The crown breaking forceps comprise two upper forceps bodies, the two upper forceps bodies are arranged in a hinged mode, the top ends of the two upper forceps bodies are each fixedly connected with two inverted-cone-shaped forceps beak heads, the bottom ends of the two upper forceps bodies are each provided with a lower forceps body, and installation grooves are formed in the outer sides of the upper forceps bodies. According to the crown breaking clamp, two abutting blocks extrude two clamping blocks respectively, the two clamping blocks move in the opposite directions, two first sliding rods slide on two fixing blocks, two first reset springs are elastically compressed, the two clamping blocks are moved out of two clamping grooves respectively, then a lower clamp body is rotated, a rotating block drives a rotating rod to rotate, and the two clamping blocks are clamped in the clamping grooves. After the lower plier body is rotated to a certain position, the two pressing blocks are loosened, the two clamping blocks are reset, and the two clamping blocks are clamped into the other two clamping grooves, so that folding of the crown breaking plier is achieved, and the problem that placing space is occupied when the crown breaking plier is stored and placed is solved.

Description

Technical Field

[0001] The utility model relates to a crown breaking pliers, in particular to a crown breaking pliers, belonging to the technical field of medical instruments. Background Art

[0002] Dental metal, porcelain or all-ceramic crown restorations, if the restoration is poorly made or the abutment tooth itself is not treated properly, leading to inflammation of the abutment tooth or the patient cannot tolerate it due to other discomforts, often require the removal of the original restoration before treatment. However, this type of fixed restoration is generally firmly bonded to the abutment tooth with adhesives, and is often difficult to remove. We generally need to grind a longitudinal groove on the labial and buccal surface of the crown, the depth of which should reach the abutment tooth, and then insert the tip of the crown breaking forceps into the groove, and by applying force to the crown breaking forceps, the three beaks of the crown breaking forceps are separated in two directions, pushing the restorations on both sides of the groove, thereby deforming the crown restorations on both sides of the groove and causing the restorations to loosen and fall off.

[0003] Currently, most crown breaking pliers on the market have an integrated jaw body. When the crown breaking pliers are stored, the jaw body cannot be folded due to the certain length of the crown breaking pliers. Instead, the jaw body will occupy a part of the storage space when stored. Therefore, a crown breaking pliers is designed to solve the above-mentioned shortcomings. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model aims to provide crown breaking pliers in order to solve the above problems, so as to solve the problem that in the prior art, most of the pliers bodies of the crown breaking pliers are arranged in one piece, and when the crown breaking pliers are stored and placed, the pliers bodies cannot be folded due to the certain length of the pliers, and instead will occupy a part of the placement space when stored and placed.

[0006] (II) Technical solution

[0007] The utility model is realized through the following technical scheme: a crown breaking pliers comprises two upper pliers bodies, the two upper pliers bodies are hingedly arranged, the top ends of the two upper pliers bodies are fixedly connected with two inverted cone-shaped pliers beaks, the bottom ends of the two upper pliers bodies are provided with a lower pliers body, the outer sides of the upper pliers bodies are provided with a mounting groove, the top of the lower pliers body is fixedly connected with a rotating block, the inner side of the rotating block is fixedly connected with a rotating rod, the rotating rod is arranged inside the mounting groove and is rotatably connected to the upper pliers body, the outer ends of the rotating rod are sleeved with fixed disks, the two fixed disks are fixedly connected to the upper pliers body, a limiting assembly is provided between the rotating block and the two fixed disks, and the two The fixing plate is provided with two card slots on the opposite side, the rotating rod is provided with a long groove, and the bottom of the long groove is provided with two slide grooves, and the two slide grooves are communicated with the long groove, and two fixing blocks are fixedly connected inside the long groove, and the first sliding rod is slidably connected inside the fixing block, and a card block is fixedly connected to one end of the first sliding rod, and a first return spring is sleeved on the outer side of the first sliding rod, and the two ends of the first return spring are respectively fixedly connected to the card block and the fixed block, and the card block passes through the slide groove and is slidably connected to the rotating rod, and a pressing component is provided on one side of the card block, and the setting of the first return spring plays the role of elastic compression and elastic return.

[0008] Preferably, the limiting assembly comprises two connecting rods, both of which are fixedly connected to the front and rear sides of the rotating block, and one end of each of the two connecting rods is fixedly connected to a sliding ball.

[0009] Preferably, the limit assembly also includes two arc grooves, which are respectively opened on opposite sides of the two fixed plates, and the two sliding balls are respectively arranged inside the two arc grooves and in sliding contact with the two fixed plates. The setting of the two sliding balls can realize the limitation of the rotation angle of the rotating block, so as to know that the lower clamp body rotates to the specified position.

[0010] Preferably, the pressing assembly includes a stop block, which is arranged inside the elongated groove, and the stop block is arranged to contact the card block. One side of the stop block is fixedly connected to a second sliding rod, and the outer side of the second sliding rod is slidably connected to a connecting block, and both ends of the connecting block are fixedly connected to the rotating rod.

[0011] Preferably, a second return spring is sleeved on the outer side of the second slide rod, and both ends of the second return spring are fixedly connected to the connecting block and the abutment block respectively. The provision of the second return spring plays the role of elastic stretching and elastic return.

[0012] Preferably, one end of the second sliding rod is fixedly connected to a pressing block, and the pressing block is arranged inside the elongated groove and in sliding contact with the rotating rod.

[0013] The utility model provides a crown breaking pliers, which has the following beneficial effects:

[0014] 1. The crown-breaking pliers have two abutting blocks that squeeze two card blocks respectively, and the two card blocks move in opposite directions. The two first sliding bars slide on the two fixed blocks, and the two first reset springs are elastically compressed to realize that the two card blocks are respectively moved out from the inside of two of the card slots. After that, the lower pliers body is rotated, and the rotating block drives the rotating rod to rotate. After the lower pliers body is rotated to a certain position, the two pressing blocks are loosened to realize the resetting of the two card blocks, and the two card blocks are inserted into the other two card slots, thereby realizing the folding of the crown-breaking pliers, and solving the problem of occupying the placement space when stored.

[0015] 2. For the crown breaking pliers, when the rotating block drives the rotating rod to rotate, the rotating block drives the two sliding balls to slide inside the two arc-shaped grooves through the two connecting rods. When the sliding ball reaches one end of the arc-shaped groove, it indicates that the lower pliers body has rotated to a certain position. This structural design can limit the angle of the lower pliers body and the rotating block after rotation, so that the clamping block can be easily inserted into the clamping groove when it is reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a right side view of the utility model;

[0018] Figure 3 This is a schematic diagram of the fixed disk structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the rotating rod of the utility model.

[0020]

Main component symbol description

[0021] 1. Upper pliers body; 2. Inverted cone-shaped pliers beak head; 3. Mounting groove; 4. Lower pliers body; 5. Rotating block; 6. Rotating rod; 7. Fixed plate; 8. Arc groove; 9. Sliding ball; 10. Connecting rod; 11. Slot; 12. Block; 13. Sliding groove; 14. First sliding rod; 15. Fixed block; 16. First return spring; 17. Block; 18. Second sliding rod; 19. Pressing block; 20. Connecting block; 21. Second return spring; 22. Long groove. DETAILED DESCRIPTION

[0022] The embodiment of the utility model provides crown breaking pliers.

[0023] See also Figure 1 , Figure 2 , Figure 3 and Figure 4, including two upper pliers 1, the two upper pliers 1 are hingedly arranged, the tops of the two upper pliers 1 are fixedly connected to two inverted cone-shaped pliers beaks 2, the bottoms of the two upper pliers 1 are provided with lower pliers 4, the outer side of the upper pliers 1 is provided with a mounting groove 3, the top of the lower pliers 4 is fixedly connected to a rotating block 5, the inner side of the rotating block 5 is fixedly connected to a rotating rod 6, the rotating rod 6 is arranged inside the mounting groove 3 and is rotatably connected to the upper pliers 1, and fixed plates 7 are sleeved at both ends of the outer side of the rotating rod 6, the two fixed plates 7 are fixedly connected to the upper pliers 1, a limiting assembly is provided between the rotating block 5 and the two fixed plates 7, and the two fixed plates 7 are on opposite sides. Two card slots 11 are provided, a long slot 22 is provided on the inner side of the rotating rod 6, two slide slots 13 are provided at the bottom of the long slot 22, the two slide slots 13 are communicated with the long slot 22, two fixed blocks 15 are fixedly connected inside the long slot 22, a first slide bar 14 is slidably connected to the inner side of the fixed block 15, a card block 12 is fixedly connected to one end of the first slide bar 14, a first return spring 16 is sleeved on the outer side of the first slide bar 14, two ends of the first return spring 16 are respectively fixedly connected to the card block 12 and the fixed block 15, the card block 12 passes through the slide slot 13 and is slidably connected to the rotating rod 6, and a pressing component is provided on one side of the card block 12.

[0024] The pressing assembly includes a stop block 17, which is arranged inside the elongated slot 22. The stop block 17 is arranged in contact with the card block 12. A second slide bar 18 is fixedly connected to one side of the stop block 17. A connecting block 20 is slidably connected to the outer side of the second slide bar 18. Both ends of the connecting block 20 are fixedly connected to the rotating rod 6. A second return spring 21 is sleeved on the outer side of the second slide bar 18. Both ends of the second return spring 21 are respectively fixedly connected to the connecting block 20 and the stop block 17. A pressing block 19 is fixedly connected to one end of the second slide bar 18. The pressing block 19 is arranged inside the elongated slot 22 and in sliding contact with the rotating rod 6.

[0025] Specifically, the four inverted cone-shaped beaks 2 are arranged in a staggered design, and the tip width of the inverted cone-shaped beaks 2 can be controlled to be about 0.8 mm.

[0026] When the crown-breaking pliers need to be folded, the two pressing blocks 19 on the rotating rod 6 are pressed in opposite directions, and the two pressing blocks 19 slide in opposite directions inside the elongated groove 22, and the two second sliding bars 18 push the two resisting blocks 17 to move in that relative direction, and the two second return springs 21 are elastically stretched, and the two resisting blocks 17 respectively squeeze the two clamping blocks 12, and the two clamping blocks 12 move in opposite directions, and the two first sliding bars 14 slide on the two fixed blocks 15, and the two first return springs 16 are elastically compressed, so that the two clamping blocks 12 are respectively moved out from the two clamping grooves 11, and then, the lower pliers body 4 is rotated, and the rotating block 5 drives the rotating rod 6 to rotate, and after the lower pliers body 4 is rotated to a certain position, the two pressing blocks 19 are loosened again, and the two clamping blocks 12 are reset, and the two clamping blocks 12 are clamped into the other two clamping grooves 11, so that the crown-breaking pliers are folded, which solves the problem of occupying the placement space when stored.

[0027] See also Figure 1 , Figure 2 and Figure 3 The limiting assembly includes two connecting rods 10, which are fixedly connected to the front and rear sides of the rotating block 5, and one end of the two connecting rods 10 is fixedly connected to a sliding ball 9. The limiting assembly also includes two arc grooves 8, which are respectively opened on the opposite sides of the two fixed plates 7, and the two sliding balls 9 are respectively arranged inside the two arc grooves 8 and in sliding contact with the two fixed plates 7.

[0028] Specifically, when the rotating block 5 drives the rotating rod 6 to rotate, the rotating block 5 drives the two sliding balls 9 to slide inside the two arc grooves 8 through the two connecting rods 10. When the sliding ball 9 reaches one end of the arc groove 8, it indicates that the lower clamp body 4 has rotated to a certain position. This structural design can limit the angle of the lower clamp body 4 and the rotating block 5 after rotation, so that the clamp block 12 can be easily inserted into the clamping groove 11 when it is reset.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A crown breaking pliers, comprising two upper pliers (1), characterized in that: The two upper pliers (1) are hingedly arranged, the top ends of the two upper pliers (1) are fixedly connected to two inverted cone-shaped pliers beaks (2), the bottom ends of the two upper pliers (1) are provided with lower pliers (4), the outer sides of the upper pliers (1) are provided with mounting grooves (3), the tops of the lower pliers (4) are fixedly connected to a rotating block (5), the inner sides of the rotating block (5) are fixedly connected to a rotating rod (6), the rotating rod (6) is arranged inside the mounting groove (3) and is rotatably connected to the upper pliers (1), the outer ends of the rotating rod (6) are sleeved with fixed disks (7), the two fixed disks (7) are fixedly connected to the upper pliers (1), a limiting assembly is provided between the rotating block (5) and the two fixed disks (7), and two opposite sides of the two fixed disks (7) are provided with A card slot (11), an elongated slot (22) is provided on the inner side of the rotating rod (6), two slide slots (13) are provided at the bottom of the elongated slot (22), the two slide slots (13) are communicated with the elongated slot (22), two fixed blocks (15) are fixedly connected inside the elongated slot (22), a first slide bar (14) is slidably connected inside the fixed block (15), one end of the first slide bar (14) is fixedly connected to the card block (12), a first return spring (16) is sleeved on the outer side of the first slide bar (14), the two ends of the first return spring (16) are respectively fixedly connected to the card block (12) and the fixed block (15), the card block (12) passes through the slide slot (13) and is slidably connected to the rotating rod (6), and a pressing component is provided on one side of the card block (12).

2. The crown breaking pliers according to claim 1, characterized in that: The limiting assembly comprises two connecting rods (10), the two connecting rods (10) are fixedly connected to the front and rear sides of the rotating block (5), and one end of the two connecting rods (10) is fixedly connected to a sliding ball (9).

3. The crown breaking pliers according to claim 2, characterized in that: The limit assembly further comprises two arc grooves (8), the two arc grooves (8) are respectively opened on opposite sides of the two fixed plates (7), and the two sliding balls (9) are respectively arranged inside the two arc grooves (8) and in sliding contact with the two fixed plates (7).

4. The crown breaking pliers according to claim 1, characterized in that: The pressing assembly comprises a stop block (17), the stop block (17) being arranged inside the elongated groove (22), the stop block (17) being arranged in contact with the clamping block (12), one side of the stop block (17) being fixedly connected to a second sliding rod (18), the outer side of the second sliding rod (18) being slidably connected to a connecting block (20), and both ends of the connecting block (20) being fixedly connected to the rotating rod (6).

5. The crown breaking pliers according to claim 4, characterized in that: A second return spring (21) is sleeved on the outer side of the second slide rod (18), and two ends of the second return spring (21) are respectively fixedly connected to the connecting block (20) and the stop block (17).

6. The crown breaking pliers according to claim 4, characterized in that: One end of the second sliding rod (18) is fixedly connected to a pressing block (19), and the pressing block (19) is arranged inside the elongated groove (22) and is in sliding contact with the rotating rod (6).

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