A hand tool for snap fasteners

Abstract

A hand tool for snap fasteners, characterized by: a first arm part, wherein the first end of the first arm part is equipped with a snap fastener holder and the second end transitions into a first handle, a first spacer area is located between the opposing side walls in the middle area of ​​the first arm part, and protruding teeth are arranged on the inside of the first arm part, located between the first end of the first arm part and the middle area;second arm part, wherein the first end of the second arm part is equipped with a push-button main part and the second end transitions into a second handle, the push-button main part is associated with the push-button holder, the middle end of the second arm part is movably insertable into the first space area of ​​the first arm part, wherein the second arm part and the first arm part are arranged crosswise, on the inside of the second arm part there is a toothed slot which is arranged between the first end of the second arm part and the middle area, the toothed slot movably engages with the protruding teeth;Connecting part in which one end of the connecting part is rotatably attached to a first joint point of the first arm part, wherein the first joint point is arranged between the first end of the first arm part and the central area, and the other end of the connecting part is rotatably attached to a second joint point of the second arm part, wherein the second joint point is arranged between the first end of the second arm part and the central area.

Description

Technical field

[0001] The present invention relates to the technical field of hand tools, in particular a hand tool for snap fasteners. Technical background

[0002] Fasteners such as buttons, eyelets, etc., are typically used for clothing, bags, and other products. Eyelets are primarily used for trousers, advertising banners, tarpaulins, and similar applications. When using eyelets, a hole often needs to be made at the intended location first. Then, one end of the eyelet is pulled through the hole and secured with pressure, creating a loop through which a cord can be threaded. When processing and assembling buttons, an edge around the button usually needs to be pressed. In current technology, such connections are typically made using snap fastener pliers.

[0003] However, most snap fastener pliers currently in use have two handles, and the clamping force comes from the operator squeezing the two handles together. If the snap fastener is difficult to attach, especially if there is high resistance when pressing, current pliers may not provide enough clamping force to complete the task, thus limiting their use. Subject of the revelation

[0004] The objective of the present invention is to provide a hand tool for snap fasteners that solves the technical problem that, in the existing technology, its use is limited due to insufficient pressing force.

[0005] To achieve the above-mentioned goal, the present invention proposes a hand tool for snap fasteners, comprising: A first arm section, the first end of which is equipped with a snap-button holder and the second end transitions into a first handle. A first spacer is located between the opposing side walls in the middle section of the first arm section. Protruding teeth are arranged on the inside of the first arm section, situated between the first end of the first arm section and the middle section. A second arm section, the first end of which is equipped with a snap fastener main part, and the second end transitions into a second handle. The snap fastener main part is associated with the snap fastener holder. The middle end of the second arm section can be movably inserted into the first space of the first arm section, with the second and first arm sections arranged crosswise. On the inside of the second arm section is a toothed slot located between the first end of the second arm section and the middle space. The toothed slot movably engages with the protruding teeth.

[0006] Connecting part, wherein one end of the connecting part is rotatably attached to a first joint point of the first arm part, the first joint point being located between the first end of the first arm part and the central area, and the other end of the connecting part is rotatably attached to a second joint point of the second arm part, the second joint point being located between the first end of the second arm part and the central area.

[0007] Furthermore, the first space is open at the opposite ends along the longitudinal direction of the first arm section, so that the two ends of the second arm section can each be led out of the open ends of the first space, thus enabling a movable cross arrangement of the first arm section with the second arm section.

[0008] Furthermore, a first limiting step and a second limiting step are located on the side of the middle section of the second arm section. The first limiting step is positioned near the tooth slot, while the second limiting step is positioned near the second end of the second arm section. This brings the two limiting steps into contact with the open side walls at the ends of the first spacer section, thus providing a boundary.

[0009] Furthermore, a first gear is formed on the inside of the first arm section, extending towards the first end of the second arm section. The first gears are arranged in pairs, and the ends of both gears are each provided with protruding teeth. A second gear is also formed on the inside of the second arm section, extending towards the first end of the first arm section. The ends of both gears are each provided with tooth slots. The two tooth slots engage with the two protruding teeth.

[0010] Furthermore, one end of the connecting part is rotatably connected to the first gear, while the other end of the connecting part is rotatably connected to the second gear.

[0011] The connecting piece further comprises two opposing plate sections and two pivot axes. Each plate section is positioned between the first and second gears, with one pivot axe passing through the through holes at one end of the two plate sections and through the through holes in the two first gears to create a pivot connection. The other pivot axis passes through the through holes at the other end of the two plate sections and through the through holes in the two second gears, also creating a pivot connection.

[0012] Furthermore, the snap fastener holder is detachably arranged at the first end of the first arm part, the snap fastener holder having a storage groove for receiving a connecting button.

[0013] The hand tool further comprises a latch rotatably mounted in the first spacer of the first arm section via a pivot axis. The pivot axis extends along the thickness of the first arm section, with the central section of the second arm section having a second spacer that is open on the side of the latch. The latch extends outward, forming a first projection on the side of the first handle and a second projection on the side of the push button main body. The latch also has an actuating area that protrudes from the opening of the first spacer. Actuating this area rotates the latch, engaging the second projection at the top of the second spacer and the first projection at the top of the first spacer, thus achieving a relative locking of the second arm section relative to the first arm section.

[0014] Furthermore, the upper edge of the first spacer extends inwards and forms a first stop device, while the upper edge of the second spacer extends inwards and forms a second stop device, with the first projection coming into contact with the first stop device and the second projection coming into contact with the second stop device to limit the movement of the second arm part relative to the first arm part.

[0015] Furthermore, the hand tool includes an elastic element positioned between the first and second handles. The elasticity of this element is used to push the two handles apart. A first tube is located on the inside of the first handle, and a second tube is located on the inside of the second handle. Both ends of the elastic element are inserted into the first and second tubes, respectively.

[0016] The technical solution described above shows that the hand tool for snap fasteners is operated by grasping the first handle of the first arm section and the second handle of the second arm section, pressing the main part of the snap fastener together with the snap fastener holder to create the snap. The middle end of the second arm section is movably positioned within the first space of the first arm section, and the second arm section is arranged crosswise with the first arm section. During the snap fastening process, the protruding teeth on the inside of the first arm section movably engage with the toothed slot on the inside of the second arm section to increase the pressing force.The structure is compact, the operation is easier, and the connecting part allows the protruding teeth to move only within the tooth slot, effectively improving the stability and reliability of the pressing force and making the tool suitable for processing various fasteners.

[0017] In order to make the technical concept and the other objectives, advantages, features and functions of the present invention clearer and more understandable, preferred embodiments are explained in detail below with reference to the accompanying drawings. Description of drawings

[0018] To clarify the technical solution of the embodiments of the present invention, a brief description of the drawings used in these embodiments follows. Obviously, the drawings shown in the following description represent only some embodiments of the present invention. Provided that no creative work is required, a person skilled in the art can derive other drawings from these. Fig. Figure 1 shows a perspective view of a hand tool for snap fasteners according to an embodiment of the present application; Fig. Figure 2 shows a schematic representation of the structure of the hand tool for snap fasteners according to an embodiment of the present application when the plate piece is removed; Fig. Figure 3 shows a perspective view of the hand tool for snap fasteners from a different angle according to an embodiment of the present application; Fig. Figure 4 shows a top view of the hand tool for snap fasteners according to an embodiment of the present application; Fig. 5 shows a cross-section AA from Fig. 4 of the hand tool for snap fasteners according to an embodiment of the present application; Fig. Figure 6 shows an exploded view of the structure of the hand tool for snap fasteners according to an embodiment of the present application; Fig. Figure 7 shows an exploded view of the structure of the hand tool for snap fasteners from another perspective according to an embodiment of the present application; Fig. Figure 8 shows a schematic representation of the structure of the first arm part of the hand tool for snap fasteners according to an embodiment of the present application; Fig. Figure 9 shows a schematic representation of the structure of the second arm part of the hand tool for snap fasteners according to an embodiment of the present application.

[0019] The drawings mentioned above contain the following reference symbols: 10, first arm section; 110, first handle; 111, first tube; 120, first gear; 121, protruding teeth; 130, first spacing section; 131, first assembly pass; 132, first stop device; 140, second assembly pass; 20, second arm section; 210, second handle; 211, second tube; 220, second gear; 221, tooth slot; 230, second spacing range; 231, second stop device; 240, first limit step; 250, second limit step; 260, third assembly pass; 30, push button holder; 310, first installation area; 320, storage groove; 40, push button main part; 410, second installation area; 50, connecting part; 510, plate piece; 520, swivel axis; 60, latch; 610, actuation range; 620, first projection; 630, second projection; 640, perforation; 650, pivot axis; 70, rubber sleeve; 710, plug head. Detailed description of embodiments

[0020] The embodiment of the present application provides a hand tool for snap fasteners to solve the technical problem of limited use due to low pressing force in existing technology. The pressing force is increased by the movable interlocking of the protruding teeth 121 on the inside of the first arm part 10 and the toothed slot 221 on the inside of the second arm part 20, thus making the entire snapping process more efficient. This effectively avoids the limitations imposed by low pressing force and ensures a compact and stable structure suitable for processing various fasteners.

[0021] To enable those skilled in the art to better understand the technical solution of the present application, the technical solution of the present application is described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments represent only a subset of the embodiments of the present application and not all embodiments. Based on the embodiments of the present invention, all other embodiments that can be derived by those skilled in the art without creative activity are within the scope of protection of the present application.

[0022] Please refer to Fig. The present embodiment provides a hand tool for snap fasteners, comprising: The first arm section 10, wherein the first end of the first arm section 10 is equipped with a push-button holder 30 and the second end transitions into a first handle 110. A first spacer area 130 is located between the opposing side walls in the middle region of the first arm section 10. Protruding teeth 121 are arranged on the inside of the first arm section 10, located between the first end of the first arm section 10 and the middle region; A second arm section 20, wherein the first end of the second arm section 20 is equipped with a push-button main part 40 and the second end transitions into a second handle 210. The push-button main part 40 is associated with the push-button holder 30. The middle end of the second arm section 20 can be movably inserted in the first space 130 of the first arm section 10, with the second arm section 20 and the first arm section 10 arranged crosswise. On the inside of the second arm section 20 is a toothed slot 221, which is arranged between the first end of the second arm section 20 and the middle space. The toothed slot 221 movably engages with the protruding teeth 121. Both the first arm section 10 and the second arm section 20 are curved and can be made of metal.Since the first arm part 10 and the second arm part 20 are connected crosswise and movably to each other, the hand tool can be squeezed together by gripping the first handle 110 and the second handle 210, thereby pressing the push button holder 30 at the front end of the first arm part 10 together with the push button main part 40 at the front end of the second arm part 20 to actuate the push button mechanism.

[0023] Connecting part 50, wherein one end of the connecting part 50 is rotatably attached to a first pivot point of the first arm part 10, the first pivot point being located between the first end of the first arm part 10 and the central region, and the other end of the connecting part 50 is rotatably attached to a second pivot point of the second arm part 20, the second pivot point being located between the first end of the second arm part 20 and the central region. This connection part 50 ensures that the protruding teeth 121 engage movably with the tooth slot 221 and are inseparable, resulting in a simple, compact, stable, and reliable structure.

[0024] It is evident that the hand tool for snap fasteners in this embodiment is designed by grasping the first handle 110 of the first arm section 10 and the second handle 210 of the second arm section 20 in order to press the snap fastener main part 40 together with the snap fastener holder 30. The middle end of the second arm section 20 can be movably inserted in the first spacer 130 of the first arm section 10, and the second arm section 20 is arranged crosswise with the first arm section 10. During the pressing process, the protruding teeth 121 on the inside of the first arm section 10 movably engage with the toothed slot 221 on the inside of the second arm section 20, thereby increasing the pressing force.The structure is compact, operation is simplified, and the connecting part 50 ensures that the protruding teeth 121 are only movable within the tooth slot 221, effectively improving the stability and reliability of the pressing force. The hand tool is suitable for processing various fasteners.

[0025] In this embodiment, as in Fig. As shown, the first spacer 130 is open at opposite ends along the longitudinal direction of the first arm section 10, allowing the two ends of the second arm section 20 to extend from the open ends of the first spacer 130, thus enabling a movable cross-arrangement of the first arm section 10 with the second arm section 20. During assembly, the second end of the second arm section 20 is guided through the first spacer 130 of the first arm section 10, and the protruding teeth 121 engage with the tooth slot 221. The connecting part 50 is then rotatably connected at both ends to the first arm section 10 and the second arm section 20 to complete the product assembly. The structure is simple, assembly is convenient, and machining and production costs are low.

[0026] Specifically, as in the Fig. As shown, the side of the middle section of the second arm section 20 has a first limiting step 240 and a second limiting step 250. The first limiting step 240 is located near the tooth slot 221, while the second limiting step 250 is located near the second end of the second arm section 20. Thus, the first limiting step 240 and the second limiting step 250 provide a boundary by abutting the open side walls at the ends of the first spacer area 130, so that the middle end of the second arm section 20 is only movable within the first spacer area 130 of the first arm section 10, thereby preventing the second arm section 20 from falling out of the first spacer area 130 and causing mechanical failure.

[0027] In doing so, as in the Fig. As shown, the two sides of the central region of the second arm section 20 extend inwards and form a recessed surface, such that the thickness of the central region of the second arm section 20 is less than the thickness of its two ends. This results in the recessed surface of the central region of the second arm section 20 forming a first boundary step 240 and a second boundary step 250 with each of its two ends. This allows the recessed surface of the central region of the second arm section 20 to be movably accommodated within the first spacer 130 of the first arm section 10, enabling the first arm section 10 and the second arm section 20 to movably intersect.

[0028] Furthermore, as in the Fig. As shown, the inner side of the first arm section 10 extends towards the first end of the second arm section 20, forming a first gear 120. The first gear 120 is arranged in pairs, and the ends of both first gears 120 are each provided with protruding teeth 121. A second gear 220 extends along the inner side of the second arm section 20 towards the first end of the first arm section 10. The second gear 220 is also arranged in pairs, and the ends of both second gears 220 are each provided with tooth slots 221. The two tooth slots 221 and the two protruding teeth 121 are arranged in pairs so that they movably mesh with each other. This enables an effective increase in the stability and reliability of the snap fastener performance through the reciprocal, movable meshing of the two sides of the product.

[0029] Furthermore, as in the Fig. As shown, one end of the connecting part 50 is rotatably connected to the first gear 120, and the other end of the connecting part 50 is rotatably connected to the second gear 220. This means that the connecting part 50 limits the movement of the first gear 120 and the second gear 220, so that the protruding teeth 121 can only movably engage within the tooth slot 221. This increases the stability and reliability of the tool's pressing force and improves the qualification rate of the fastener processing.

[0030] In this embodiment, as in the Fig. As shown, the connecting part 50 comprises two opposing plate pieces 510 and two pivot axes 520. Each plate piece 510 is arranged between the first gear 120 and the second gear 220, with one of the pivot axes 520 passing through the through holes at one end of the two plate pieces 510 and through the through holes in the two first gears 120 to enable a pivot connection. The other pivot axis 520 passes through the through holes at the other end of the two plate pieces 510 and through the through holes in the two second gears 220, also to enable a pivot connection. The two plate pieces 510 are arranged on opposite sides of the product. The pivot axes 520 can be fastened by rivets or bolts.

[0031] Specifically, as in Fig. As shown, the snap fastener holder 30 is detachably arranged at the first end of the first arm section 10, the snap fastener holder 30 having a storage groove 320 for receiving a connecting button. The front end of the second arm section 20 is provided with a third mounting passage 260, and the upper part of the snap fastener main part 40 is provided with a second installation area 410, which forms an axis or rod. This allows the snap fastener main part 40 to be inserted through the second installation area 410 into the third mounting passage 260 and detachably connected, using either a threaded or bolted connection. In this way, the connecting element is positioned in the storage groove 320 to prevent it from falling out or detaching during the snapping process. The structure is safer and more reliable.

[0032] As in Fig. As shown, the front end of the first arm section 10 has a second mounting passage 140, and the underside of the snap fastener holder 30 is provided with a first installation area 310, which forms an axis or a rod. This allows the snap fastener holder 30 to be inserted through the first installation area 310 into the second mounting passage 140 and detachably connected, using either a threaded or a bolted connection. In other embodiments, a side hole can be provided on one side of the second mounting passage 140, and a slot is provided on the side of the first installation area 310 of the snap fastener holder 30, so that a screw passes through the side hole and is secured in the slot to fasten the snap fastener holder 30.In this way, the push button holder 30 can be replaced if necessary to support different shapes or sizes of fasteners, thus expanding the application possibilities of the product.

[0033] In this embodiment, as in the Fig. As shown, the hand tool for snap fasteners additionally includes a latch 60, which is rotatably mounted in the first spacer 130 of the first arm section 10 via a pivot axis 650. The pivot axis 650 extends along the thickness of the first arm section 10. The central area of ​​the second arm section 20 has a second spacer 230 on its opposite side walls, which is open on the side of the latch 60. The latch 60 extends on the side of the first handle 110 and forms a first projection 620, while on the side of the snap fastener main part 40 it forms a second projection 630. The latch 60 also includes an actuation area 610 that projects from the opening of the first spacer 130.Actuating the actuating area 610 rotates the latch 60, causing the second projection 630 to engage at the upper end of the second spacer area 230 and the first projection 620 to engage at the upper end of the first spacer area 130, thus locking the second arm section 20 relative to the first arm section 10. This allows for a tight connection between the push button main part 40 and the push button holder 30 for processing and assembling fasteners. To unlock the latch 60, the actuating area 610 simply needs to be pressed in the opposite direction, which removes the second projection 630 from the upper end of the second spacer area 230, allowing the second arm section 20 to move relative to the first arm section 10.

[0034] As in the Fig. As shown, first mounting passes 131 are provided on the opposite side walls of the first distance area 130. The central area of ​​the bolt 60 has a perforation 640 through which the pivot axis 650 passes, so that the bolt 60 is rotatably mounted in the first distance area 130. The pivot axis 650 can be realized by rivets or bolts.

[0035] Specifically, as in the Fig. As shown, the upper edge of the first spacer 130 extends inwards and forms a first stop 132, which is designed as a narrow plate. The upper edge of the second spacer 230 extends inwards and forms a second stop 231, which has a plate-like structure. This brings the first projection 620 and the first stop 132, as well as the second projection 630 and the second stop 231, into contact, thereby limiting the movement of the second arm section 20 relative to the first arm section 10.

[0036] In this embodiment, as in the Fig. As shown, the hand tool for snap fasteners also includes an elastic element positioned between the first handle 110 and the second handle 210. The elastic element's force pulls the two handles apart. A first tube 111 is located on the inside of the first handle 110, and a second tube 211 is located on the inside of the second handle 210. The two ends of the elastic element are inserted into the first tube 111 and the second tube 211, respectively. This facilitates opening and closing the product, as the elastic element automatically pulls the handles apart.

[0037] The elastic element can be implemented using a torsion spring or an elastic metal sheet, with both ends of the elastic element being inserted into the first tube 111 and the second tube 211, respectively. The structure is simple, assembly is convenient, and manufacturing costs are low. The portion of the first tube 111 facing away from the first handle 110 has a first notch, and the portion of the second tube 211 facing away from the second handle 210 has a second notch. These notches provide sufficient freedom of movement for the elastic element when opening and closing the product, thus improving the safety and reliability of the structure and preventing mechanical failures.

[0038] Specifically, as in the Fig.As shown, the hand tool for snap fasteners also includes a rubber sleeve 70, which can be made of plastic or rubber. The inside of the rubber sleeve 70 is uniformly fitted with several plug heads 710, and the outside of the first handle 110 is correspondingly equipped with several sockets. By inserting the plug heads 710 into the sockets, the rubber sleeve 70 on the outside of the first handle 110 is covered. This protection provided by the rubber sleeve 70 effectively reduces wear and tear on the user's hand.

[0039] It is evident from the above description that the embodiments of the present invention described above achieve the following technical effects: The hand tool for snap fasteners according to the present invention allows the snap fastener main part 40 to be pressed together with the snap fastener holder 30 by grasping the first handle 110 of the first arm section 10 and the second handle 210 of the second arm section 20, in order to actuate the snap fastener mechanism. The middle end of the second arm section 20 can be movably inserted in the first spacer 130 of the first arm section 10, and the second arm section 20 is arranged crosswise with the first arm section 10. During the pressing process, the protruding teeth 121 on the inside of the first arm section 10 movably engage with the toothed slot 221 on the inside of the second arm section 20, thereby increasing the pressing force.The structure is compact, operation is made easier, and the connecting part 50 ensures that the protruding teeth 121 are only movable within the tooth slot 221, which effectively improves the stability and reliability of the pressing force.

[0040] It should be noted that the terms used here serve only to describe the specific embodiments and are not intended to limit the exemplary embodiments of the present application. As used here, the singular refers to the plural unless the context indicates otherwise. Furthermore, the term "comprises" and / or "includes" in this description should be understood to denote the existence of features, steps, actions, devices, components and / or combinations thereof.

[0041] Unless otherwise stated, the relative arrangement of parts and steps, as well as the numerical expressions and values ​​described in these exemplary embodiments, do not limit the scope of protection of the present application. It should also be noted that, for ease of description, the parts shown in the drawings are not drawn to scale. Techniques, methods, and devices known to those skilled in the art in this field may not be discussed in detail; however, where applicable, these techniques, methods, and devices are to be considered part of the disclosure. All specific values ​​used in the examples shown and discussed should be interpreted merely as illustrative and not as limiting. Therefore, other examples of the exemplary embodiment may have different values.It should be noted that similar reference symbols and letters in subsequent drawings represent similar elements. Therefore, it is not necessary to discuss an element defined in one drawing further in subsequent drawings.

[0042] In the description of this application, the terms "middle", "top", "bottom", "front", "back", "left", "right", "transverse", "longitudinal", "vertical", "perpendicular", "horizontal", "above", "below", "inside", "outside", etc., refer to the orientations or positions shown in the drawings. These terms serve only to facilitate description and for simplification, and are not intended to indicate or suggest that the devices or elements in question must have a specific orientation or a particular design and operating mode. They should therefore not be understood as limiting the present application.

[0043] It should be explained that, unless expressly stated otherwise, in the description of this application, the terms "establish," "connect," "connect," and "assemble" are to be understood in a broad sense. For example, they may refer to a fixed connection, a detachable connection, an overlapping connection, or an integral connection. Those skilled in the art will be able to understand the specific meaning of these terms in the context of this application, depending on the specific circumstances.

[0044] In the description of this utility model, the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "above," "one side," "top," "inside," "front," "center," "both ends," etc., are to be understood as referring to the orientations or positions shown in the drawings. These terms serve only to facilitate description and for simplification, and are not intended to indicate or suggest that the devices or elements in question must have a specific orientation or a particular design and operating mode. They must therefore not be understood as limiting the present application.

[0045] Furthermore, it should be explained that in the description of the present application, the terms "first," "second," etc., are used to distinguish the respective parts, solely to enable clear identification of the parts. Unless otherwise stated, these terms have no special meaning and must not be understood as limiting the scope of protection of the present application. In the description of the present invention, the term "several" generally means two or more parts.

[0046] The embodiments of the present invention described above are preferred embodiments. However, it should be noted that those skilled in the art in this field may make various modifications and improvements, provided they do not deviate from the principle of the present invention, which also fall within the scope of protection of the present invention.

Claims

[1] A hand tool for snap fasteners, characterized by: first arm section, wherein the first end of the first arm section is equipped with a push-button holder and the second end transitions into a first handle, between the opposing side walls in the middle area of ​​the first arm section there is a first space area, on the inside of the first arm section there are protruding teeth which are located between the first end of the first arm section and the middle area;second arm part, wherein the first end of the second arm part is equipped with a push-button main part and the second end transitions into a second handle, the push-button main part is associated with the push-button holder, the middle end of the second arm part is movably insertable into the first space area of ​​the first arm part, wherein the second arm part and the first arm part are arranged crosswise, on the inside of the second arm part there is a toothed slot which is arranged between the first end of the second arm part and the middle area, the toothed slot movably engages with the protruding teeth;Connecting part in which one end of the connecting part is rotatably attached to a first joint point of the first arm part, wherein the first joint point is arranged between the first end of the first arm part and the central area, and the other end of the connecting part is rotatably attached to a second joint point of the second arm part, wherein the second joint point is arranged between the first end of the second arm part and the central area. [2] The hand tool for snap fasteners according to claim 1, characterized by , that the first space is open at the opposite ends along the longitudinal direction of the first arm section, so that the two ends of the second arm section can each be led out of the open ends of the first space to allow a movable cross arrangement of the first arm section with the second arm section. [3] The hand tool for snap fasteners according to claim 2, characterized by, that a first limiting step and a second limiting step are arranged on the side of the middle area of ​​the second arm part, wherein the first limiting step is located near the tooth slot and the second limiting step is located near the second end of the second arm part, in order to abut against the open side walls at the ends of the first space area by means of the first limiting step and the second limiting step respectively, and thus to provide a limit. [4] The hand tool for snap fasteners according to claim 1, characterized by, that on the inside of the first arm part in the direction of the first end of the second arm part a first gear is formed, wherein the first gear is arranged in pairs and the ends of the two first gears each have protruding teeth, on the inside of the second arm part in the direction of the first end of the first arm part a second gear is formed, which is also arranged in pairs, wherein the ends of the two second gears each have a tooth slot which engages with the two protruding teeth in a corresponding manner. [5] The hand tool for snap fasteners according to claim 4, characterized by , that one end of the connecting part is rotatably attached to the first gear, while the other end of the connecting part is rotatably attached to the second gear. [6] The hand tool for snap fasteners according to claim 5, characterized by, that the connecting part comprises two opposing plate pieces and two pivot axes, each of the plate pieces being arranged between the first gear and the second gear, and wherein one of the pivot axes is passed through the through holes at one end of the two plate pieces and through the through holes on the two first gears to enable a joint connection, the other pivot axis is passed through the through holes at the other end of the two plate pieces and through the through holes on the two second gears to also enable a joint connection. [7] The hand tool for snap fasteners according to any one of claims 1 to 6, characterized by , that the snap fastener holder is detachably attached to the first end of the first arm part, the snap fastener holder having a storage groove for receiving a connecting button. [8] The hand tool for snap fasteners according to any one of claims 1 to 6, characterized by, that it further comprises a latch which is rotatably mounted by a pivot axis in the first spacer of the first arm part, the pivot axis extending along the thickness of the first arm part, the middle area of ​​the second arm part having a second spacer which is open opposite the side of the latch, the latch extending outwards and forming a first projection on the side of the first handle as well as a second projection on the side of the push button main part, the latch also having an actuation area which projects from the opening of the first spacer in order to rotate the latch by actuating the actuation area, so that the second projection at the upper end of the second spacer and the first projection at the upper end of the first spacer are engaged, thereby achieving a relative locking of the second arm part relative to the first arm part. [9] The hand tool for snap fasteners according to claim 8, characterized by , that the upper edge of the first space area forms a first stop device inwards and the upper edge of the second space area forms a second stop device inwards, wherein the first projection comes into contact with the first stop device and the second projection comes into contact with the second stop device in order to limit the movement of the second arm part relative to the first arm part. [10] The hand tool for snap fasteners according to any one of claims 1 to 6, characterized by, that it also includes an elastic element arranged between the first handle and the second handle in order to pull the two handles apart by means of the elasticity of the elastic element, on the inside of the first handle is a first tube and on the inside of the second handle is a second tube, the two ends of the elastic element are each inserted into the first tube and the second tube.

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