JP3155322U - Hand tool with improved mouth structure - Google Patents

Abstract

An object of the present invention is to provide a hand tool that has a flexible pressing effect between an arc-shaped convex surface of a mouth portion and a nut cut surface, prevents the nut cut surface from being damaged, and prevents the nut from slipping during the rotation process. A hand tool having an improved mouth structure is provided with a plurality of arc-shaped convex surfaces projecting in an arc shape on the inner edge of the mouth portion, and the base angle of the receiving recess serving as the outer edge of the mouth portion is set to an arc-shaped guide angle. , By making each two arc convex surfaces correspond to all the surfaces of the nut among the plurality of arc convex surfaces, the holding area with the nut cut surface increases, preventing slipping phenomenon at the time of nut rotation, and at the same time circular arc convex surface Prevents damage to the face when the nut face is pressed. Furthermore, the base angle of the housing recess is the arc guide angle, and the rotational stress of the mouth is dispersed, thereby increasing the industrial utility value. [Selection] Figure 2

Description

  The present invention relates to a hand tool, and more particularly, to a hand tool with an improved mouth structure that stops a screw component such as a nut.

  Stopping nuts using hand tools is a popular technology, and its development has already matured considerably and can be said to be an industry with limited development potential. Therefore, in general, improvement of the structure and material of the hand tool is performed as required by the user. However, the range of use of wrench tools is the largest among hand tools, and the superiority or inferiority of the design of the wrench mouth is largely related to whether the screws can be easily tightened or not.

  FIG. 9 shows a known structural design of the mouth portion, and this type of wrench mouth portion is composed of a plurality of receiving recesses 23a and an arcuate convex surface 24a arranged in an annular shape at intervals. Generally, a polygonal (for example, hexagonal) corner 42a (hereinafter referred to as a cutting angle) 42a of the nut 40a is accommodated in the receiving recess of the mouth portion, thereby preventing a disadvantage that a relatively weak cutting angle is damaged when the nut is turned. Further, the function of the arc convex surface mainly has an effect of pressing the cut surface 41a of the nut. However, since the outer edge angle 25a of the hollow mouth of this type of known wrench is formed at a substantially right angle, the structure has a defect that rotational stress tends to concentrate, and therefore lacks practicality. Furthermore, such a right-angled arrangement also becomes a difficult point when manufacturing it, and it is difficult to form it regardless of iron making or casting.

Further, the ratio of the length and width of the arc convex surface of this type of known wrench is about 1: 2. From this, it can be easily understood that the depth of the arc convex surface of this kind of known wrench is 1/2 of the length of the gap of the accommodating recess. Furthermore, the pressing area of the arc convex surface and the nut cut surface, which are relatively shallow in depth, is considerably small. Therefore, there is a drawback that the nut slips when the nut is moved.
As a prior art, for example, as shown in FIGS. 8 and 9 of Patent Document 1, in order to accommodate the nut N in the inner peripheral part of the sockets 5 and 6 accommodated in the accommodating parts in the holding frames 2 and 3. The fitting portions 5c and 6c are arranged. The fitting portions 5c and 6c are shaped like a frame in which a plurality of (12) triangular waves are lined up when viewed from the side. It has a structure in which six corners of the hexagonal nut enter and engage with the part.
However, in the mouth structure of the ratchet wrench disclosed in Patent Document 1, when the operator operates the handle (handle) 2b to tighten the nut N, the cut surface of the nut has a triangular wave shape of the fitting portions 5c and 6c. There is a risk that the nut will be pressed strongly against the corners and the cut surface of the nut may be damaged or the triangular-wave fitting part may be damaged.

JP 2008-213076 (FIGS. 8 and 9)

  The problems to be solved by the present invention are that the outer edge angle of a known wrench's hollow mouth is formed at a substantially right angle, so that the rotational stress tends to concentrate due to its structure and the nut when rotating the nut Is slippery.

  According to the present invention, the mouth portion into which the nut is mainly fitted is formed in an arc shape projecting from a plurality of arcuate convex surfaces on the inner edge, and the base angle of the housing recess is an arc guide angle. The convex surface of the arc increases the holding area with the nut cut surface and prevents the slip phenomenon that is likely to occur when the nut is rotated. To do. Furthermore, since the bottom angle of the housing recess is an arc guide angle, the most important feature is that the rotational stress of the mouth is dispersed, thereby increasing the industrial utility value.

  The hand tool with an improved mouth structure according to the present invention has a soft pressing effect when the arc convex surface of the mouth and the nut face face each other, and prevents the nut face structure from being broken, and the nut face. There is an advantage that the nut is completely pressed and the phenomenon that the nut slips during the rotation process is prevented.

1 is an exploded perspective view of a first embodiment of the present invention. It is a perspective view which shows the external appearance of the state which assembled FIG. It is a cross-sectional view which shows the state which fitted the nut to the opening | mouth part of the assembly of FIG. It is the enlarged view to which a part of mouth part in FIG. 3 was expanded. It is a perspective view which shows the external appearance of 2nd Example of this invention. It is a perspective view which shows the state which fits the socket wrench in FIG. 5, and the main body shown in the 1st Example, and fits a nut to the cover part of a socket wrench. It is a perspective view which shows the external appearance of the modification of the 2nd Example of FIG. It is a perspective view which shows the external appearance of the 3rd Example of this invention. It is a top view of the hand tool which has a well-known mouth part structure.

  An object of the present invention is to provide a hand tool that can improve the industrial usability by creating a hand tool having an improved mouth structure in order to improve the above-described problems of the known technology.

  In order to achieve the above object, a hand tool having an improved mouth structure according to the present invention includes the following configuration.

  The main body includes a handle, and the handle has a head disposed at at least one end, and an engaging portion is disposed on a bottom edge of the head. Further, a retaining ring is disposed on the engaging portion, and is fixed so as to be removed on the engaging portion. A receiving part is formed in the head, a ratchet part is received in the receiving part, a perforation is provided between the head and the handle, and a stop part is provided in the perforation.

  In the ratchet part, a tooth part that meshes with the stop part is formed on the outer edge, and a mouth part corresponding to the hexagon nut is formed on the inner edge. The mouth portion is constituted by twelve recesses projecting outwardly spaced and twelve arcuate convex surfaces recessed inwardly, each having two arcuate convex surfaces. Corresponding to any surface of the hexagonal nut, the outer edge angle of the accommodating recess is an arc guide angle, the arc convex surface is an arc shape, and the ratio of the height and width of the arc convex surface is 1 to 1.6.

  Among them, the main feature of the present invention is that when the arc convex surface of the mouth and the nut cut surface are in contact with each other, it has a flexible holding effect, prevents the nut cut surface structure from being broken, and completely cuts the nut cut surface. Prevents the presser and nut from slipping during the rotation process. In addition, the present invention has an effect of sufficiently dispersing stress when the nut is rotated. In particular, by setting the outer edge angle of the housing recess to an arc guide angle, it is possible to prevent the mouth from being damaged due to excessive rotational force.

  In order to explain the features, contents, advantages, and effects of the present invention, the present invention will be described below with reference to the drawings and embodiments. Of these, the drawings used are intended to assist and explain the purpose of the drawings, and are not necessarily proportional in size to those after implementation of the present invention, and are not an accurate arrangement. Therefore, it should be noted that the proportions and arrangement relationships in the drawings do not correspond to those in the claims actually implemented of the present invention.

  The present invention mainly relates to a hand tool having an improved mouth structure, and is not limited to the hand tool specific form in the present specification. Although the ratchet wrench shown as an example is described in the embodiments, in the case of actual application, an arrangement suitable for actual use is necessary, and it can be applied on different types of hand tools.

  As shown in FIGS. 1 to 4, a preferred embodiment of a hand tool with an improved mouth structure includes a body 10 and a ratchet piece 20.

  The main body 10 includes a handle 12, and the handle 12 has a head 14 disposed at least at one end. A hooking portion 15 is disposed on the bottom edge of the head portion 14, and a retaining ring 17 that can be removed is disposed on the hooking portion 15. This is hooked on the hooking portion 15 by the hooking method, and a housing portion 16 is formed in the head portion 14, and the ratchet component 20 is housed in the housing portion 16. Further, a perforation 18 is formed between the head 14 and the handle 12, the perforation 18 communicates with the accommodating portion 16, and a stop part 30 is further disposed on the inner wall of the perforation 18 or an additional screw hole. In addition, it includes a stop member 31, a spring 32, and a screw fixing part 33, and a portion of the stop member 31 extends to the accommodating portion 16.

  The ratchet component 20 described above forms a tooth portion 21 that meshes with the stop component 30 on the outer edge, and forms a mouth portion 22 that fits a nut on the inner edge. The mouth portion 22 is composed of a housing recess 23 projecting outward with a plurality of intervals and an arcuate convex surface 24 recessed inward with a plurality of intervals. Of these, the outer edge angle 25 of the receiving recess 23 is an arcuate guide angle, and the outer mold of the outer edge angle 25 in the shape of the arc simplifies the iron making or casting process of the mouth portion 22 and at the same time, the arc design of the outer edge angle 25 However, the stress is effectively dispersed during the rotation of the mouth portion 22, and the mouth portion 22 is prevented from being broken by applying an excessive force during the rotation.

  Further, the arc convex surface 24 of the present invention has an arc shape, and the main effect of the generally known arc convex surface 24 is that when the screw fixing component 33 is rotated at the mouth portion 22, the arc convex surface 24 and the hexagonal nut are rotated. Since all surfaces 41 of 40 are pressed against each other, the phenomenon that the hex nut 40 slips is prevented. Therefore, the present inventor has designed twelve arc convex surfaces 24 and made each arc convex surface 24 correspond to each cut surface of the nut 40, thereby achieving the effect of accurately pressing the hexagon nut 40 cut surface 41, and the hexagon nut. 40 and the mouth part 22 were completely pressed down during the rotation process, thereby preventing the hex nut 40 from slipping. Specifically, each of the two arcuate convex surfaces 24, 24 is made to correspond to the entire surface 41 of the hex nut 40. In addition, since the cut surface 41 of the hexagon nut 40 is a portion where the receiving force of the hexagon nut 40 is maximized, the arc convex surface 24 becomes an arc outer shape, and the portion receiving the maximum force during the rotation process of the cut surface 41 of the hexagon nut 40. Thus, the cut surface 41 of the hex nut 40 is prevented from collapsing, the cut surface 41 of the hex nut 40 and the flexible pressing are achieved, and the structure of the cut surface 41 of the hex nut 40 is prevented from being destroyed. An example of the ratio of the favorable length and width of the arcuate convex surface 24 in the embodiment of the present invention is 1 to 1.6, and the hexagonal nut 40 is prevented from slipping when the arcuate convex surface 24 and the hexagonal nut 40 cut surface 41 are completely pressed. Effectively prevent.

  FIG. 5 shows a second embodiment of the present invention, which further includes a socket wrench 50. Among them, a fitting portion 51 is disposed at the upper end of the socket wrench 50, and a cover portion 52 having the same appearance as that disposed at the mouth portion 22 of the main body 10 in the first embodiment is disposed at the lower end of the socket wrench 50. Is done. A plurality of receiving recesses 521 and a plurality of arcuate convex surfaces 522 of the cover portion 52 are formed in the same arrangement as the mouth portion 22. Among them, a rectangular through hole 53 is provided in the middle of the fitting portion 51 of the socket wrench 50, and a concave opening 54 and a convex surface 55 corresponding to the mouth portion 22 of the ratchet component 20 are formed on the outer edge of the fitting portion 51. The socket wrench 50 is fixed to the main body 10 by fitting the fitting portion 51 of the socket wrench 50 to the mouth portion 22 of the main body 10 described above (see FIG. 6). Further, by fitting the cover portion 52 at the lower end of the socket wrench 50 into the hexagon nut 40, the effect of rotating the same as in the above-described good first embodiment is achieved.

  FIG. 7 shows a modified example of the second embodiment of the present invention. A socket 51 is provided with a fitting portion 51 having a concave opening 54 and a convex surface 55 on the outer edge at the upper end thereof. As in the second embodiment of FIG. 5, a square through hole 53 is formed, and a hexagonal rotating portion 56 is formed at the lower end as a modification different from the second embodiment of FIG.

  FIG. 8 shows a third embodiment of the present invention. A socket wrench 50A is provided with a perforation 53A for fitting a general D head wrench (not shown) at one end, and the inner edge at the other end is a second end. Similar to the embodiment, the cover portion 52A is provided. The plurality of receiving recesses 521A and the plurality of arcuate convex surfaces 522A of the cover portion 52A are the same as those arranged in the mouth portion 22 in the first embodiment, and a general D head wrench is further improved by the cover portion 52A. Achieve efficiency.

  As can be seen from the above, the present invention improves the known technology, enhances the effect, and is not conceived by those skilled in the art. Furthermore, the present invention has never been disclosed, and the present invention has an inventive step and practicality, and meets the requirements of the utility model.

  The above embodiment is to explain the technical idea and features of the present invention. The purpose of this embodiment is to enable those skilled in the art to understand and implement the contents of the present invention. However, all modifications or modifications based on the spirit of the present invention shall belong to the claims of the present invention.

DESCRIPTION OF SYMBOLS 10 Main body 12 Handle 14 Head 15 Engagement part 16 Receiving part 17 Retaining ring 18 Retaining ring 18 Drilling 20 Ratchet part 21 Tooth part 22 Mouth part 23 Receiving recessed part 24 Arc convex surface 25 Outer edge angle 30 Stopping part 31 Stopping member 32 Spring 33 Screw fixing part 40 Hexagon Nut 41 Cut surface 50 Socket wrench 50A Socket wrench 51 Fitting part 52 Cover part 52A Cover part 521 Accommodating recess 521A Accommodating recess 522 Arc convex surface 522A Arc convex surface 53 Perforation 53A Perforation 54 Concave opening 55 Convex surface 56 Rotating part

Claims (4)

In hand tools with improved mouth structure mainly including the main body and ratchet parts,
The body includes a handle, the handle has a head disposed at least at one end, a hook portion is disposed on a bottom edge of the head, and a retaining ring is disposed on the hook portion, It is fixed so that it can be removed from the hooking portion, a receiving portion is provided in the head portion, the ratchet component is received in the receiving portion, and a perforation is provided between the head portion and the handle. The stop parts are arranged inside,
The ratchet part forms a tooth part that meshes with the stop part on the outer edge, and the inner edge forms a mouth part corresponding to the hexagonal nut, and the mouth part projects outwardly with a space therebetween. Containing recesses and twelve arcuate convex surfaces that are recessed inward with an interval, each two arcuate convex surfaces correspond to all surfaces of the hexagon nut, and the outer edge angle of the accommodating recess is A hand tool having an improved mouth structure, characterized by an arcuate guide angle, the arcuate convex surface being arcuate, and an example of the ratio of the arcuate convexity height to width is 1 to 1.6.   The hand tool improved in the mouth structure further includes a socket wrench, and a fitting portion is disposed at an upper end of the socket, a perforation is formed through the fitting portion, and an outer edge of the fitting portion is provided. Forms a concave opening and a convex surface corresponding to the mouth portion of the ratchet part, and a cover portion is disposed at the lower end of the socket wrench, and twelve of the cover portions protrude outward with a gap. Containing recesses and twelve arcuate convex surfaces that are recessed inwardly with an interval, and each of the two arc convex surfaces corresponds to any surface of the hexagon nut, and the outer edge angle of the accommodating recess is 2. The mouth structure according to claim 1, wherein the arc convex surface has an arcuate guide angle, the arc convex surface is arc-shaped, and the ratio of the height and width of the arc convex surface is 1 to 1.6. Hand tool.   The hand tool improved in the mouth structure further includes a socket wrench, and a fitting portion is disposed at an upper end of the socket, a perforation is formed through the fitting portion, and an outer edge of the fitting portion is provided. 2. The mouth structure according to claim 1, wherein a recess and a convex surface corresponding to the mouth of the ratchet part are formed, and a hexagonal rotating part is formed at a lower end of the socket wrench. Hand tool.   The hand tool having an improved mouth structure further includes a socket wrench, and a hole for fitting the head wrench is provided at one end thereof, and a cover part is provided at the inner edge of the other end. Contained recesses that protrude outwards with a gap between them, and arc convex surfaces that are twelve with indents that are recessed inwardly. Correspondingly, the outer edge angle of the receiving recess is an arc guide angle, the arc convex surface is an arc shape, and an example of the ratio of the height and width of the arc convex surface is 1 to 1.6. A hand tool having an improved mouth structure according to Item 1.

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