CN217225424U - Nail puller - Google Patents

Abstract

The application discloses a nail puller, which comprises an upper clamping arm, a lower clamping arm and an elastic piece; the rear end of the upper clamping arm is rotatably connected with the rear end of the lower clamping arm; the front end of the upper clamping arm is provided with upper clamping teeth, and the front end of the lower clamping arm is provided with lower clamping teeth; the elastic piece is arranged between the upper clamping arm and the lower clamping arm and used for forcing the upper clamping tooth and the lower clamping tooth to be separated from each other; the nail puller also comprises a connecting piece, and the rear ends of the upper clamping arm and the lower clamping arm are rotatably arranged on the connecting piece; the lower surface of the upper clamping arm is provided with an upper clamping seat, and the upper surface of the lower clamping arm is provided with a lower clamping seat; the elastic part is a W-shaped spring, two ends of the W-shaped spring are respectively clamped in the upper clamping seat and the lower clamping seat, and the bottom of the W-shaped spring is abutted against the connecting piece. The nail puller has the advantages of low assembly difficulty, low production difficulty, high production efficiency, low production cost and good stability in use.

Description

Nail puller

Technical Field

The application relates to the technical field of office supplies, in particular to a nail puller.

Background

At present, documents such as paper, books and the like are generally bound by staples, and when the binding is wrong or parts of the documents need to be taken out for use, the staples need to be removed; to facilitate removal of the staples and to protect the integrity of the paper, staple removers are commonly used by people to remove the staples.

The existing nail puller generally comprises two clamping arms and an elastic piece; one end of each of the two clamping arms is hinged, and the other end of each of the two clamping arms is provided with clamping teeth which are staggered with each other; the elastic piece is arranged between the two clamping arms and used for forcing the two clamping teeth to be separated from each other; when the staple removing device is used, the two clamping arms are pressed by hands, so that the two clamping teeth are positioned between the staple and paper, and the staple can be easily removed.

However, the existing nail puller has the following defects: the elastic part of the existing nail puller is generally a torsion spring, when the nail puller is assembled, the torsion spring needs to be installed firstly, then the upper clamping arm and the lower clamping arm are riveted, and the difficulty of the riveting process is increased due to the elasticity of the torsion spring; the assembly difficulty of the nail puller is high, the production difficulty is high, the production efficiency is low, and the production cost is improved.

Therefore, it is an urgent problem to be solved by those skilled in the art to improve the existing nail puller to overcome the above-mentioned shortcomings.

Disclosure of Invention

An aim at of this application provides one kind and reduces the assembly degree of difficulty, reduces the production degree of difficulty, improves production efficiency, reduces manufacturing cost, and the better nail puller of stability during the use.

In order to achieve the purpose, the technical scheme adopted by the application is that the nail puller comprises an upper clamping arm, a lower clamping arm and an elastic piece; the rear end of the upper clamping arm is rotatably connected with the rear end of the lower clamping arm; the front end of the upper clamping arm is provided with upper clamping teeth, and the front end of the lower clamping arm is provided with lower clamping teeth; the elastic piece is arranged between the upper clamping arm and the lower clamping arm and used for forcing the upper clamping teeth and the lower clamping teeth to be separated from each other; the nail puller also comprises a connecting piece, and the rear ends of the upper clamping arm and the lower clamping arm are rotatably arranged on the connecting piece; the lower surface of the upper clamping arm is provided with an upper clamping seat, and the upper surface of the lower clamping arm is provided with a lower clamping seat; the elastic piece is a W-shaped spring, two ends of the W-shaped spring are respectively clamped in the upper clamping seat and the lower clamping seat, and the bottom of the W-shaped spring abuts against the connecting piece.

Preferably, the width of the W-shaped spring is smaller than the widths of the upper and lower clamp arms, and the width of the W-shaped spring is greater than or equal to 1/2 of the widths of the upper and lower clamp arms. The advantages are that: the upper limit of the width of the W-shaped spring is limited to be smaller than the widths of the upper clamping arm and the lower clamping arm, so that the W-shaped spring is hidden between the upper clamping arm and the lower clamping arm; the 1/2 which is larger than or equal to the widths of the upper clamping arm and the lower clamping arm is arranged below the width line of the W-shaped spring, so that the bottom of the W-shaped spring is prevented from moving in a staggered mode along the left-right direction to enable the W-shaped spring to fall off, and the stability of the nail puller is improved.

Preferably, the upper clamping arm has upper limiting plates extending downwards from the left and right sides thereof, or the lower clamping arm has lower limiting plates extending upwards from the left and right sides thereof. The advantages are that: through be formed with last spacing board on going up the arm, perhaps be formed with lower limiting plate on the arm down, can strengthen the spacing to W shape spring prevents that W shape spring drops.

Preferably, the left side and the right side of the upper clamping arm extend downwards to form upper limiting plates, the left side and the right side of the lower clamping arm extend upwards to form lower limiting plates, and the upper limiting plates and the lower limiting plates are arranged in a staggered mode in the left-right direction. The advantages are that: this enhances the retention of the W-shaped spring, preventing the W-shaped spring from falling off. The dislocation arrangement between the upper limiting plate and the lower limiting plate is divided into two conditions: when the widths of the upper clamping arm and the lower clamping arm are the same, the upper limiting plate and the lower limiting plate are alternately arranged; and secondly, when the width difference between the upper clamping arm and the lower clamping arm is larger than two times of the thickness of the upper limiting plate and the lower limiting plate, the two upper limiting plates are positioned between the two lower limiting plates or the two lower limiting plates are positioned between the two upper limiting plates.

Preferably, the number of the upper clamping teeth and the number of the lower clamping teeth are two; the two upper clamping teeth are respectively and integrally formed at the front ends of the two upper limiting plates, and the two lower clamping teeth are respectively and integrally formed at the front ends of the two lower limiting plates. The advantages are that: go up the arm lock and lower arm lock is generally made for stainless steel material, produces through the mode of this kind of integral type, can improve production efficiency, reduction in production cost. Firstly, integrally blanking a stainless steel material to obtain the upper clamping arm and the lower clamping arm; and then, the upper limiting plate and the upper clamping teeth are formed on the upper clamping arm in an integrated stamping mode, and the lower limiting plate and the lower clamping teeth are formed on the lower clamping arm.

Preferably, the connecting piece is a rivet, the two upper limiting plates and the two lower limiting plates are coaxially provided with riveting holes, and the rivet is rotatably arranged in the riveting holes. The advantages are that: the upper clamping arm and the lower clamping arm can be rotatably connected through the matching of the rivet and the upper limiting plate and the lower limiting plate; this is convenient for go up the arm lock and the installation between the arm lock down improves production efficiency, reduces manufacturing cost.

Preferably, a first sliding groove penetrates through the upper limiting plate from left to right, a second sliding groove penetrates through the lower limiting plate from left to right, and the second sliding groove comprises a locking section and an unlocking section which are communicated with each other; the nail puller further comprises a sliding rod, the sliding rod is connected to the first sliding groove and the second sliding groove in a sliding mode, and bulges used for limiting the sliding rod to move in the left-right direction are arranged at two ends of the sliding rod; when the sliding rod slides into the locking section, the upper clamping arm and the lower clamping arm are limited from rotating relatively; when the sliding rod slides into the unlocking section, the upper clamping arm and the lower clamping arm can rotate relatively. The advantages are that: when the sliding rod slides into the locking section, the upper clamping arm and the lower clamping arm are limited to rotate relatively; at the moment, the upper clamping teeth are in contact with the lower clamping teeth and are hidden between the upper clamping arms and the lower clamping arms, so that the safety of the nail puller is improved, and meanwhile, the size of the nail puller is reduced, and the nail puller is convenient to transport and carry. When the sliding rod slides into the unlocking section, the upper clamping arm and the lower clamping arm can rotate relatively; through setting up the length of unblock section can restrict go up the arm lock with rotation angle between the arm lock down prevents go up the arm lock with rotation angle between the arm lock down is too big, makes the W-shaped spring is impaired.

Preferably, the nail puller further comprises two pressing bodies, and the two pressing bodies are respectively arranged on the upper surface of the front end of the upper clamping arm and the lower surface of the front end of the lower clamping arm; the pressing body is provided with a pressing arc surface, and the width of the pressing arc surface is 2-3 times of the width of the upper clamping arm and the width of the lower clamping arm. The advantages are that: the upper clamping arm and the lower clamping arm are rotated by pressing the upper clamping arm and the lower clamping arm; through the upper surface of going up the arm lock and the lower surface setting of arm lock down press the body, can increase the lifting surface area when pressing, be convenient for pass through press the body and press go up the arm lock and the arm lock down. The pressing cambered surface is arranged on the pressing body, the width of the pressing cambered surface is 2-3 times of the width of the upper clamping arm and the lower clamping arm, and the pressing cambered surface is matched with fingers, so that the pressing body is more comfortable when used. In order to facilitate the production of the pressure body while reducing the production costs and improving the tactile feel of the pressure body, the pressure body is typically made of plastic.

Preferably, the two pressing bodies are detachably connected to the upper clamping arm and the lower clamping arm respectively. The advantages are that: through press the body with go up the arm lock and can dismantle the connection between the arm lock down, both realized press the installation of body, be convenient for again after the damage press the body to change.

Preferably, the front ends of the upper clamping seat and the lower clamping seat are provided with an inclined surface structure or an arc surface structure. The advantages are that: the front ends of the upper clamping seat and the lower clamping seat are set to be the inclined surface structure or the cambered surface structure, so that two ends of the W-shaped spring can conveniently penetrate through the upper clamping seat and the lower clamping seat; after the two ends of the W-shaped spring penetrate through the upper clamping seat and the lower clamping seat, the two ends of the W-shaped spring are respectively clamped in the upper clamping seat and the lower clamping seat under the action of the elastic force of the W-shaped spring.

Compared with the prior art, the beneficial effect of this application lies in: (1) when the nail puller is assembled, the upper clamping arm and the lower clamping arm can be rotatably installed through the connecting piece; and sliding the W-shaped spring between the upper clamping arm and the lower clamping arm from the front ends of the upper clamping arm and the lower clamping arm until the two ends of the W-shaped spring are respectively clamped in the upper clamping seat and the lower clamping seat, and the bottom of the W-shaped spring is abutted against the connecting piece. Compare in installing earlier the current assembly methods of elastic component, this kind of back installation the assembly methods operation of elastic component is simpler, and can avoid the elastic component is right go up the arm lock and assembly between the arm lock causes the influence down to can reduce the assembly degree of difficulty, improve production efficiency, reduce manufacturing cost.

(2) Two ends of the W-shaped spring are limited through the upper clamping seat and the lower clamping seat respectively, and the bottom of the W-shaped spring abuts against the connecting piece for limiting; therefore, in the using process of the nail puller, the elastic piece cannot fall off, so that the stability of the nail puller in use can be ensured.

Drawings

Fig. 1 is a perspective view of the nail puller in a locked state.

Fig. 2 is a cross-sectional view of the staple remover provided by the present application in a locked state.

Fig. 3 is an exploded view of the staple remover as provided herein.

Fig. 4 is a perspective view of the staple remover provided by the present application in an unlocked state.

Fig. 5 is a cross-sectional view of the staple remover provided by the present application in an unlocked state.

Fig. 6 is a perspective view of the upper clamping arm and the lower clamping arm provided by the present application, which have the same width.

Fig. 7 is a front view of the perspective view of fig. 6 provided by the present application.

In the figure: 1. an upper clamping arm; 11. an upper clamping tooth; 12. an upper clamping seat; 13. an upper limiting plate; 14. a first chute; 2. a lower clamping arm; 21. a lower clamping tooth; 22. a lower clamping seat; 23. a lower limiting plate; 24. a second chute; 241. a locking section; 242. an unlocking section; 25. a limiting bulge; 3. a W-shaped spring; 31. the bottom of the W-shaped spring; 4. riveting; 5. a slide bar; 6. a pressing body.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1 to 7, an embodiment of the present application provides a nail puller including an upper clamp arm 1, a lower clamp arm 2, and an elastic member; the rear end of the upper clamping arm 1 is rotatably connected with the rear end of the lower clamping arm 2; the front end of the upper clamping arm 1 is provided with an upper clamping tooth 11, and the front end of the lower clamping arm 2 is provided with a lower clamping tooth 21; the elastic piece is arranged between the upper clamping arm 1 and the lower clamping arm 2 and used for forcing the upper clamping tooth 11 and the lower clamping tooth 21 to be separated from each other; the nail puller also comprises a connecting piece, and the rear ends of the upper clamping arm 1 and the lower clamping arm 2 are rotatably arranged on the connecting piece; the lower surface of the upper clamping arm 1 is provided with an upper clamping seat 12, and the upper surface of the lower clamping arm 2 is provided with a lower clamping seat 22; the elastic part is a W-shaped spring 3, two ends of the W-shaped spring 3 are respectively clamped in the upper clamping seat 12 and the lower clamping seat 22, and the bottom 31 of the W-shaped spring abuts against the connecting piece. When the nail puller is assembled, the upper clamping arm 1 and the lower clamping arm 2 can be rotatably installed through the connecting piece; and then the W-shaped spring 3 is slid between the upper clamping arm 1 and the lower clamping arm 2 from the front ends of the upper clamping arm 1 and the lower clamping arm 2 until the two ends of the W-shaped spring 3 are respectively clamped in the upper clamping seat 12 and the lower clamping seat 22, and the bottom 31 of the W-shaped spring abuts against the connecting piece. Compare in the current assembly methods of installing the elastic component earlier, this kind of assembly methods operation of after-installation elastic component is simpler, and can avoid the elastic component to last arm lock 1 and lower arm lock 2 between the assembly cause the influence to can reduce the assembly degree of difficulty, improve production efficiency, reduce manufacturing cost. Two ends of the W-shaped spring 3 are respectively limited by the upper clamping seat 12 and the lower clamping seat 22, and the bottom 31 of the W-shaped spring is abutted against the connecting piece for limiting; therefore, the elastic piece can not fall off in the using process of the nail puller, and the stability is high.

Referring to fig. 3, in some embodiments of the present application, the width of the W-shaped spring 3 is smaller than the widths of the upper and lower clip arms 1 and 2, and the width of the W-shaped spring 3 is greater than or equal to 1/2 of the widths of the upper and lower clip arms 1 and 2. The upper limit of the width of the W-shaped spring 3 is limited to be smaller than the widths of the upper clamping arm 1 and the lower clamping arm 2, so that the W-shaped spring 3 can be hidden between the upper clamping arm 1 and the lower clamping arm 2; 1/2 which is larger than or equal to the widths of the upper clamping arm 1 and the lower clamping arm 2 below the width line of the W-shaped spring 3 is limited, so that the bottom 31 of the W-shaped spring is prevented from moving in a staggered manner along the left-right direction, the W-shaped spring 3 is prevented from falling off, and the stability of the nail puller in use is ensured.

Referring to fig. 3-4, in some embodiments of the present application, upper limiting plates 13 extend downward from the left and right sides of the upper clamp arm 1, or lower limiting plates 23 extend upward from the left and right sides of the lower clamp arm 2. The upper limiting plate 13 is formed on the upper clamping arm 1, or the lower limiting plate 23 is formed on the lower clamping arm 2, so that the limiting of the W-shaped spring 3 is enhanced, and the W-shaped spring 3 is prevented from falling off.

Referring to fig. 3-4 and 6-7, in some embodiments of the present application, upper limiting plates 13 extend downward from left and right sides of the upper clamping arm 1, lower limiting plates 23 extend upward from left and right sides of the lower clamping arm 2, and the upper limiting plates 13 and the lower limiting plates 23 are arranged in a staggered manner in the left-right direction. This strengthens the position limitation of the W-shaped spring 3 and prevents the W-shaped spring 3 from falling off. The misalignment between the upper and lower limiting plates 13 and 23 is divided into two cases: firstly, when the widths of the upper clamping arm 1 and the lower clamping arm 2 are the same, the upper limiting plate 13 and the lower limiting plate 23 are alternately arranged; at this time, the width of the upper arm 1 and the lower arm 2 is set to a, the thickness of the upper limiting plate 13 and the lower limiting plate 23 is set to b, the width of the W-shaped spring 3 is smaller than a-b, and the width of the W-shaped spring 3 is greater than or equal to 1/2 of the upper a-b (as shown in fig. 6-7). Secondly, when the width difference between the upper clamping arm 1 and the lower clamping arm 2 is larger than two times of the thickness of the upper limiting plate 13 and the lower limiting plate 23, the two upper limiting plates 13 are positioned between the two lower limiting plates 23 or the two lower limiting plates 23 are positioned between the two upper limiting plates 13; at this time, the upper limiting plate 13 or the lower limiting plate 23 is provided with a limiting protrusion 25, and the limiting protrusion 25 is located between the upper limiting plate 13 and the lower limiting plate 23 to prevent the upper limiting plate 13 and the lower limiting plate 23 from being displaced in the left-right direction due to a gap (as shown in fig. 3-4).

Referring to fig. 3, in some embodiments of the present application, the number of the upper clamping teeth 11 and the lower clamping teeth 21 is two; the two upper clamping teeth 11 are respectively and integrally formed at the front ends of the two upper limiting plates 13, and the two lower clamping teeth 21 are respectively and integrally formed at the front ends of the two lower limiting plates 23. Go up arm 1 and lower arm 2 and generally make for stainless steel material, produce through the mode of this kind of integral type, can improve production efficiency, reduction in production cost. Firstly, integrally blanking a stainless steel material to obtain an upper clamping arm 1 and a lower clamping arm 2; and then, an upper limiting plate 13 and an upper clamping tooth 11 are formed on the upper clamping arm 1, and a lower limiting plate 23 and a lower clamping tooth 21 are formed on the lower clamping arm 2 by an integral stamping mode.

Referring to fig. 3, in some embodiments of the present application, the connecting member is a rivet 4, and the two upper limiting plates 13 and the two lower limiting plates 23 are coaxially provided with riveting holes, and the rivet 4 is rotatably disposed in the riveting holes. The upper clamping arm 1 and the lower clamping arm 2 can be rotatably connected through the matching of the rivet 4 and the upper limiting plate 13 and the lower limiting plate 23; this be convenient for go up the installation between arm 1 and the lower arm 2, improve production efficiency, reduce manufacturing cost.

Referring to fig. 1 to 5, in some embodiments of the present application, a first sliding slot 14 is provided in the upper limiting plate 13 and penetrates left and right, a second sliding slot 24 is provided in the lower limiting plate 23 and penetrates left and right, and the second sliding slot 24 includes a locking section 241 and an unlocking section 242 that are communicated with each other; the nail puller further comprises a sliding rod 5, the sliding rod 5 is connected with the first sliding groove 14 and the second sliding groove 24 in a sliding mode, and bulges used for limiting the sliding rod 5 to move in the left-right direction are arranged at two ends of the sliding rod 5; when the sliding rod 5 slides into the locking section 241, the relative rotation between the upper clamping arm 1 and the lower clamping arm 2 is limited; when the sliding rod 5 slides into the unlocking section 242, the upper clamping arm 1 and the lower clamping arm 2 can rotate relatively. When the sliding rod 5 slides into the locking section 241, the relative rotation between the upper clamping arm 1 and the lower clamping arm 2 is limited; at this time, the upper clamping tooth 11 and the lower clamping tooth 21 are contacted with each other and hidden between the upper clamping arm 1 and the lower clamping arm 2, so that the safety of the nail puller is improved, and meanwhile, the size of the nail puller is reduced, and the nail puller is convenient to transport and carry (as shown in fig. 1-2). When the sliding rod 5 slides into the unlocking section 242, the upper clamping arm 1 and the lower clamping arm 2 can rotate relatively; by setting the length of the unlocking section 242, the rotation angle between the upper arm 1 and the lower arm 2 can be limited, and the W-shaped spring 3 is prevented from being damaged due to the fact that the rotation angle between the upper arm 1 and the lower arm 2 is too large (as shown in fig. 4-5).

Referring to fig. 1 to 5, in some embodiments of the present application, the nail puller further includes two pressing bodies 6, where the two pressing bodies 6 are respectively disposed on an upper surface of the front end of the upper clamping arm 1 and a lower surface of the front end of the lower clamping arm 2; the pressing body 6 is provided with a pressing cambered surface, and the width of the pressing cambered surface is 2-3 times of the width of the upper clamping arm 1 and the lower clamping arm 2. The upper clamping arm 1 and the lower clamping arm 2 are rotated by pressing the upper clamping arm 1 and the lower clamping arm 2; pressing body 6 is arranged on the upper surface of upper clamping arm 1 and the lower surface of lower clamping arm 2, so that the stress area during pressing can be increased, and the upper clamping arm 1 and the lower clamping arm 2 can be conveniently pressed through pressing body 6. The pressing cambered surface is arranged on the pressing body 6, the width of the pressing cambered surface is 2-3 times of the width of the upper clamping arm 1 and the lower clamping arm 2, and the pressing cambered surface is matched with fingers, so that the pressing body 6 is more comfortable when in use. In order to facilitate the production of the pressure body 6 while reducing the production cost and improving the tactile sensation of the pressure body 6, the pressure body 6 is typically made of plastic.

Referring to fig. 1-5, in some embodiments of the present application, two pressing bodies 6 are detachably connected to the upper and lower clamp arms 1 and 2, respectively. Through pressing the body 6 and last arm lock 1 and down the arm lock between 2 can dismantle the connection, both realized pressing the installation of body 6, be convenient for again to the damage after press the body 6 to change. It should be noted that the present application does not limit the detachable connection manner between the two pressing bodies 6 and the upper clamping arm 1 and the lower clamping arm 2, and reference is made to only two examples provided below:

the first embodiment is as follows: go up arm lock 1 and down arm lock 2 and be formed with the mounting hole through integrative blanking, press and be equipped with the lug on the body 6, through lug joint in the mounting hole, realize pressing body 6 and last arm lock 1 and down the dismantled connection between arm lock 2.

Example two: go up arm lock 1 and down arm lock 2 and be formed with the mounting hole through integrative blanking, press body 6 and run through about along and be equipped with the through-hole, press body 6 and go up arm lock 1 and down to lead to the screw realization and can dismantle the connection between arm lock 2.

Referring to fig. 2, in some embodiments of the present application, the front ends of the upper clamping seat 12 and the lower clamping seat 22 are provided with a bevel structure or a cambered structure. By setting the front ends of the upper clamping base 12 and the lower clamping base 22 to be an inclined surface structure or an arc surface structure (arc surface structure in the drawing), the two ends of the W-shaped spring 3 can conveniently penetrate through the upper clamping base 12 and the lower clamping base 22; after the two ends of the W-shaped spring 3 penetrate through the upper clamping seat 12 and the lower clamping seat 22, the two ends of the W-shaped spring 3 are respectively clamped in the upper clamping seat 12 and the lower clamping seat 22 under the action of the elastic force of the W-shaped spring 3. Preferably, as shown in fig. 2, the upper clamping seat 12 is integrally formed by blanking the upper end of the upper clamping arm 1 downwards, and forms a cambered surface structure at the same time of blanking; the lower clamping seat 22 is formed by integrally punching the lower end of the lower clamping arm 2 upwards, and forms an arc-shaped surface structure during punching; the forming mode is convenient to process and beneficial to improving the production efficiency.

In conclusion, the nail puller is low in assembly difficulty, low in production difficulty, high in production efficiency, low in production cost and good in stability in use.

The foregoing has described the principles, principal features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims (10)

1. A nail puller comprises an upper clamping arm, a lower clamping arm and an elastic piece; the rear end of the upper clamping arm is rotatably connected with the rear end of the lower clamping arm; the front end of the upper clamping arm is provided with upper clamping teeth, and the front end of the lower clamping arm is provided with lower clamping teeth; the elastic piece is arranged between the upper clamping arm and the lower clamping arm and used for forcing the upper clamping teeth and the lower clamping teeth to be separated from each other; the nail puller is characterized by further comprising a connecting piece, wherein the rear ends of the upper clamping arm and the lower clamping arm are rotatably arranged on the connecting piece; the lower surface of the upper clamping arm is provided with an upper clamping seat, and the upper surface of the lower clamping arm is provided with a lower clamping seat; the elastic piece is a W-shaped spring, two ends of the W-shaped spring are respectively clamped in the upper clamping seat and the lower clamping seat, and the bottom of the W-shaped spring abuts against the connecting piece.

2. The nail puller of claim 1, wherein the width of said W-shaped spring is less than the width of said upper and lower clamp arms and greater than or equal to 1/2 of the width of said upper and lower clamp arms.

3. The nail puller according to claim 1, wherein upper retainer plates extend downwardly from the left and right sides of said upper clamp arm, or lower retainer plates extend upwardly from the left and right sides of said lower clamp arm.

4. The nail puller according to claim 1, wherein upper limiting plates extend downwards from the left and right sides of the upper clamping arm, lower limiting plates extend upwards from the left and right sides of the lower clamping arm, and the upper limiting plates and the lower limiting plates are arranged in a staggered manner in the left-right direction.

5. The tacker according to claim 4, characterized in that said upper gripping teeth and said lower gripping teeth are both two in number; the two upper clamping teeth are respectively and integrally formed at the front ends of the two upper limiting plates, and the two lower clamping teeth are respectively and integrally formed at the front ends of the two lower limiting plates.

6. The nail puller according to claim 4, wherein the connecting member is a rivet, and riveting holes are coaxially formed in the two upper limiting plates and the two lower limiting plates, and the rivet is rotatably arranged in the riveting holes.

7. The nail puller according to claim 4, wherein a first slide groove penetrates left and right of the upper limiting plate, a second slide groove penetrates left and right of the lower limiting plate, and the second slide groove comprises a locking section and an unlocking section which are communicated with each other; the nail puller further comprises a sliding rod, the sliding rod is connected to the first sliding groove and the second sliding groove in a sliding mode, and bulges used for limiting the sliding rod to move in the left-right direction are arranged at two ends of the sliding rod; when the sliding rod slides into the locking section, the upper clamping arm and the lower clamping arm are limited to rotate relatively; when the sliding rod slides into the unlocking section, the upper clamping arm and the lower clamping arm can rotate relatively.

8. The nail puller according to claim 1, further comprising two pressing bodies respectively disposed on an upper surface of the front end of said upper gripper arm and a lower surface of the front end of said lower gripper arm; and a pressing arc surface is arranged on the pressing body, and the width of the pressing arc surface is 2-3 times of the width of the upper clamping arm and the width of the lower clamping arm.

9. The nail puller according to claim 8, wherein said two pressing bodies are detachably connected to said upper and lower clamp arms, respectively.

10. The nail puller according to claim 1, wherein the front ends of said upper clamp seat and said lower clamp seat are provided with a slope structure or an arc structure.

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