TWI380882B - Anti-slip wrench - Google Patents

Description

Anti-slip wrench

The present invention relates to a wrench, and more particularly to an anti-slip wrench having a simple structure and being easy to handle.

Press, use the traditional wrench, because the thumb must press the surface of the wrench handle with the thumb, the thumb and the surface of the handle can not provide sufficient friction, the thumb is easy to slide longitudinally or even laterally slip , to reduce the quality of operation; in addition, if the user's state is different, it is even more difficult to apply force, such as the impact of sweat, oil and so on. The "wrench (1)" of the new model patent application No. D116658 of the Republic of China discloses that a wrench has a groove at each end of the handle portion, which is convenient for the user to press with the thumb; however, the groove provides a thumb At the placement, during the operation, the thumb easily slides along the longitudinal direction of the groove, and the force cannot be effectively concentrated, thus affecting the quality of the force applied.

In addition, the anti-skid means forms a non-slip portion by another process, such as baking paint technology or adding structure, thereby achieving the anti-slip purpose. Therefore, the structure of a wrench that is generally intended to achieve a specific effect may not only change its structure, but may also be modified by using different materials in combination with other processing methods to achieve the desired effect; however, in the long-developed and highly competitive wrench industry, new Increased structure, new materials, and new processing methods are likely to increase costs, or change processes and lengthen production schedules, leading to weaker industrial competitiveness.

The main object of the present invention is to provide an anti-slip wrench having at least one chute, which can provide a thumb-stop effect in both the longitudinal direction and the lateral direction, which not only The simple structure provides the anti-slip effect, and can effectively concentrate the force and improve the quality of the force.

It is still another object of the present invention to provide an anti-slip wrench that provides a smooth, locating force and ergonomics of the thumb by a suitable depth of the chute mask.

Another object of the present invention is to provide an anti-slip wrench which is provided with at least one chute on both the front and the back of the handle, and the left and right dice can be operated.

It is still another object of the present invention to provide an anti-slip wrench which, by virtue of the arrangement of the chute, achieves both anti-slip and lightweight effects, is dexterous for the consumer, and reduces the material cost for the manufacturer.

Another object of the present invention is to provide an anti-slip wrench having at least one chute, which is easy and simple to operate for the consumer, relatively low in production cost and variation for the manufacturer, and improved industrial competitiveness.

In order to achieve the above object, the present invention provides an anti-slip wrench comprising a handle and at least one chute. The handle has two grip faces corresponding to the upper and lower sides, two sides corresponding to the left and right sides, and a set of joint portions provided at at least one end thereof. The chute is recessed on at least one gripping surface of the handle, and the two ends of the chute penetrate the two sides of the handle; the chute has a curved surface and two parallel sides of the curved surface and the grip edge.

Wherein the oblique groove of the inclined groove has an axial direction at an angle with the longitudinal axis of the handle, and the curved surface and the grip surface of the handle intersect with two side edges, which are parallel to each other, and the user's finger pad abuts the curved surface and At the side edges, the lateral and longitudinal anti-slip effects can be achieved due to the reaction force.

Thereby, the user can attach the curved surface to the operation of the thumb, and the chute provides longitudinal and lateral anti-slip of the user, which can effectively concentrate the force and improve the quality of the applied force.

By appropriately setting the depth of the surface, the thumb can be smoothly attached to the finger pad and positioned to apply force to the curved surface, thereby being ergonomic; and the depth is not too deep, so as to ensure contact with the curved surface by the thumb and the finger, avoiding the finger Sharp contact causes work injury.

Further, the chutes are disposed on both sides of the grip, thereby facilitating the user to operate the right and left hands, without being restricted by the habit of using the left and right. In particular, the design of the sleeve portion and the handle is not inclined, so that the right and left hands can operate the set of the non-slip wrench.

By means of the arrangement of the chute, the invention can achieve the light weight effect in addition to the anti-slip, and the lightweight wrench can be used flexibly for the consumer, and can also reduce the material cost for the manufacturer.

In addition, the wrench has a simple structure, which not only makes the operation of the consumer easy and convenient, but also allows the manufacturer to relatively reduce the production cost and the variation, thereby improving the industrial competitiveness without increasing the structure, materials, and other processing methods.

In order to provide a further understanding of the present invention, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to the first figure, the present invention provides a first preferred embodiment of an anti-skid wrench 10 that is simple in construction and easy to operate. The wrench 10 includes a handle 20 and at least one chute 30 recessed in at least one gripping surface of the handle 20.

The handle 20 has a slightly flat longitudinal body, two upper and lower grip faces, two left and right sides, two ends, and a set of joints provided at at least one end thereof.

The chute 30 is recessed on the grip 20 at least one gripping surface, and the two ends thereof penetrate through the left and right sides of the grip 20. The chute is a curved surface C having a suitable depth with a small curvature change. The curvature change and depth are not too shallow or too deep, mainly for allowing the user to fit the thumb and abdomen.

Wherein, the angle between the chute and the handle 20 is defined as: the center of the chute is the common end point O, the longitudinal axis Y of the handle is one side, and the counterclockwise rotation is inclined The angle at which the groove axis M is sandwiched; wherein the angle range is approximately 15° to 75°, 105° to 165°, and the preferred angle range is approximately 30° to 60°, 120° to 150°.

Wherein, the curved surface C and the grip surface of the handle 20 intersect with two side edges, which are approximately parallel, respectively defining an outer edge CO near the sleeve portion and an inner edge CI near the center of the grip 20.

The distance from the outer edge CO to the inner edge CI is the width of the chute 30, and the width is shorter than one knuckle, so that the curved surface C conforms to the user's fingertip, so that the fingertip is from the outer edge CO, The curved surface C, to the inner edge CI, is completely attached. Each of the side edges CO and CI is adjacent to the curved surface C. When the user's finger abuts against the curved surface C and each of the side edges CO and CI, the lateral and longitudinal anti-slip effects can be achieved by the reaction force. The two sides CO and CI also have two ends respectively, respectively defined away from the center of the chute O as the outer end point EO, and near the center of the chute O as the inner end point EI. The preferred embodiment of the angle can make the inner end points EI of the two sides CO and CI approach the same horizontal line H, thereby increasing the contact surface of the user's finger pad and the side edges CO and CI, and the reaction force at this time. Its anti-slip effect is preferred.

In the first embodiment, it is further defined that the wrench 10 has the handle 20 and two chutes 31, 32 recessed on the grip surface 21 of the handle 20. The handle 20 has a longitudinal body, an upper grip surface 21, a lower grip surface 22, a left side surface 23, a right side surface 24, a first sleeve portion 27 disposed at one end, and a second sleeve disposed at the other end. Joint 28.

The two inclined grooves 31 and 32 are recessed inwardly from the upper grip surface 21 of the handle 20 and penetrate the left and right side faces 23 and 24 of the handle 20, respectively. Each of the two chutes 31 and 32 has the aforementioned equal structure and has an included angle θ ₁ and θ ₂ , respectively.

As shown in the second figure, since the two chutes 31 and 32 have the same structure, they are represented by the chute 31. Please refer to the second drawing A and B, which are longitudinally shown along the section lines A and B, respectively. Sections S1, S2; since the chutes 31 are at least The parallel sides CO, CI and the curved surface C are defined together, and the longitudinal section of the curved surface C, such as the longitudinal sections S1 and S2, should be almost the same, or the inclined groove has a single section, as shown in the second figure A, B; The curved surface C is composed of a misalignment of the longitudinal sections of the plurality of equal segments. The curved surface C has a suitable depth with a small curvature change, so that the user can fit the curved surface C to the thumb and press it; in addition, the depth can provide a smooth thumb and positioning force, and is ergonomic; And because of the small curvature change, the depth is not too deep, to ensure that the thumb and the abdomen are in contact with the curved surface to avoid work injury caused by fingertip contact.

The embodiment of the two sets of hinges 27, 28 is made according to requirements, for example, a first end portion 27 having a closed end or a ratchet, a second sleeve portion 28 having an open end, and two sets of portions 27, 28 It can also be horizontal or mutually inclined with the handle 20.

Referring to the first figure, the concave two inclined grooves 31, 32 can be placed in the thumb, and the outer edge CO and the inner edge CI respectively prevent the thumb from sliding up and down, and the outer edge CO makes the thumb not slide to the right, and the inner side The edge CI prevents the thumb from sliding to the left; therefore, when the user presses, the obliquely disposed curved surface C can simultaneously provide the user's longitudinal and lateral blocking effects, and effectively concentrate the force, whereby the chute 30 can provide The user is longitudinally and laterally non-slip.

The present invention is not limited to the number of chutes, is not limited to a single even number, is not equidistant on one side, is not equidistant on both sides, and is not limited to whether the front and back are equidistantly disposed. In this embodiment, the chute 30 is only provided in the The single surface of the grip 20 is illustrated by a change in two chutes; the chutes 30 are spaced apart, and the distance between the chutes 30 and each of the sleeves 27, 28 can also be designed according to the required moment.

In this embodiment, the angles θ ₁ and θ _{2 of} the two chutes 31 and 32 are equal, both of which are about 30°, so that the two chutes 31 and 32 are parallel to each other; the first sleeve portion 27 and the grip 20 are The two inclined grooves 31 and 32 are respectively adjacent to the first sleeve portion 27 and the second sleeve portion 28; therefore, the user can select the appropriate margin according to the margin of the space and the required torque. One of the chutes operates.

The third embodiment of the present invention is a second embodiment of the present invention. An anti-slip wrench 50 includes a handle 60 and recessed on the upper and lower grip surfaces 61 and 62 of the handle 60, and the two ends of the two sides 63 are inserted through the left and right sides. At least one chute 70 of 64. In the embodiment, the handle 60 has a longitudinally long handle body, an upper grip surface 61, a lower grip surface 62, a left side surface 63, a right side surface 64, a first sleeve portion 67 disposed at one end, and The second end of the second portion 68; the chute 70 includes two upper chutes 71, 72 and two lower chutes 73, 74.

3 and A are respectively a top view and a bottom view of the wrench 50; the angles θ ₁ ' and θ ₂ ' of the two upper chutes 71 and 72 are equal, and in this embodiment, θ ₁ ', θ ₂ ' is about 30°, that is, the two upper chutes 71, 72 are parallel to each other; the angles θ ₃ ', θ ₄ ' of the two lower chutes 73, 74, in this embodiment, θ ₃ ', θ ₄ 'About 30° equal, that is, the two lower chutes 73, 74 are parallel to each other.

The spacing between the two upper chutes 71, 72 need not be the same as the two lower chutes 73, 74; the distance between the two upper chutes 71, 72 and the first and second nesting portions 67, 68, respectively, need not be the same. Two lower chutes 73, 74.

In addition, the angles θ ₁ ', θ ₂ ' of the two upper chutes 71, 72 are not necessarily equal to the angles θ ₃ ', θ ₄ ' of the two lower chutes 73, 74; the chute axial directions of the upper and lower chutes 71, 73 M ₁ and M ₃ do not have to be in the same direction; the chute axial directions M ₂ and M _{4 of the} upper and lower chutes 72 and 74 do not have to be in the same direction.

In this embodiment, the two upper chutes 71, 72 are disposed at a distance equal to the distance between the two lower chutes 73, 74; the two upper chutes 71, 72 are respectively associated with the first and second nesting portions 67, The distance of 68 is equal to the distance between the two lower chutes 73, 74 and the two sets of portions 67, 68.

As can be seen from the third diagrams A and B, the chute axial directions M ₁ and M _{3 of the} upper and lower chutes 71 and 73 intersect; the chute axial directions M ₂ and M _{4 of the} upper and lower chutes 72 and 74 also intersect; 71 and 73, 72 and 74 are partially overlapped, as shown in the third and third panels C.

As can be seen from the above, the chute arrangement of the upper grip surface 61 and the lower grip surface 62 is not necessary, regardless of the number of chutes, the pitch of the chutes, the distance between the chutes and the nesting portions, and the axial direction of the chutes. The same; if you design with the requirements, change them one by one, or any combination, you can have multiple implementations.

For example, in the fourth figure, the anti-slip wrench 52 of the third embodiment of the present invention has the chute configuration equal to that of the second embodiment, and the variation is that the chute axial directions M ₁ and M _{3 of the} upper and lower chutes 71 and 73 are changed. The same direction; the chute axial directions M ₂ and M _{4 of the} upper and lower chutes 72, 74 are in the same direction; therefore, the upper and lower chutes 71 and 73, 72 and 74 are completely overlapped, respectively.

The fifth embodiment is a fourth embodiment of the present invention. An anti-slip wrench 54 includes a handle 80, two upper chutes 91, 92 respectively recessed on the grip surface 81 of the handle 80, and recessed respectively. The grip 80 grips the two lower chutes 93, 94 of the face 82. The handle 80 has a longitudinal body, an upper grip surface 81, a lower grip surface 82, a left side surface 83, a right side surface 84, a first sleeve portion 87 disposed at one end, and a second sleeve disposed at the other end. Joint 88. The chutes 91, 92, 93, and 94 all pass through the left and right side faces 83, 84 of the handle 80.

5, A, B, respectively, the top view and the bottom view of the wrench 54; the angles θ ₁ ”, θ ₂ ′ of the two upper chutes 91, 92 are complementary, that is, the two upper chutes 91, 92 are symmetrical; In this embodiment, θ ₁ " is about 150° and θ ₂ " is about 30°; the angles θ ₃ ′′ and θ ₄ ′ of the two lower chutes 93 and 94 are complementary, that is, the two lower chutes 93 and 94 are also symmetrical. In this embodiment, θ ₃ " is about 30 ° and θ ₄ " is about 150 °.

The spacing between the two upper chutes 91, 92 need not be the same as the two lower chutes 93, 94; the distance between the two upper chutes 91, 92 and the first and second nesting portions 87, 88 are not necessarily the same. In the two lower chutes 93, 94.

In addition, the angles θ ₁ ", θ ₂ " of the two upper chutes 91, 92 are not necessarily complementary to the angles θ ₃ ", θ ₄ " of the two lower chutes 93, 94; the chute axes of the upper and lower chutes 91, 93 N ₁ and N ₃ do not have to be in the same direction; the chute axes N ₂ and N _{4 of the} upper and lower chutes 92 and 94 do not have to be in the same direction.

In the fourth embodiment, the two upper chutes 91, 92 are disposed at a distance equal to the distance between the two lower chutes 93, 94; the two upper chutes 91, 92 are respectively associated with the first and second sleeve portions 87. The distance of 88 is equal to the distance between the two lower chutes 93, 94 and the two sets of portions 87, 88.

It can be seen from the fifth diagrams A and B that the oblique grooves N ₁ and N _{3 of the} upper and lower chutes 91 and 92 are in the same direction; the inclined grooves N ₂ and N _{4 of the} upper and lower chutes 92 and 94 are in the same direction; The grooves 91 and 93, 92 and 94 are completely overlapped, respectively.

It can be seen from the foregoing embodiments that the angles of the chutes disposed on the same side can determine whether the chutes are parallel; and the chutes disposed on both sides determine whether the two chutes are completely overlapped by whether the chutes are axially aligned or not. It can also be considered as: the opposition to the angle between the two chutes can determine the degree of overlap between the positive and negative chutes.

For example, in the sixth embodiment, in the anti-slip wrench 56 of the fifth embodiment of the present invention, the angles θ ₁ ′, θ ₂ ′ of the two upper chutes 91a and 92a are complementary, that is, the two upper chutes 91a and 92a are symmetrical; In this embodiment, θ ₁ " is about 150° and θ ₂ ” is about 30°; the angles θ ₃ ′′ and θ ₄ ′ of the two lower chutes 93a and 94a are complementary, that is, the two lower chutes 93a and 94a are also Symmetrical; in this embodiment, θ ₃ " is about 150° and θ ₄ " is about 30°. The chute axial directions N ₁ and N _{3 of the} upper and lower chutes 91a and 92a intersect; the chute axial directions N ₂ and N _{4 of the} upper and lower chutes 92a and 94a also intersect; the second upper chutes 91a and 92a of the fifth embodiment Symmetrical, the two lower chutes 93a, 94a are symmetrical with each other, and the upper and lower chutes intersect with the N ₁ and N ₃ and N ₂ and N ₄ , so the upper and lower chutes 91a and 93a, 92a and 94a are respectively Partial overlap.

For example, in the seventh embodiment, the anti-slip wrench 58 of the sixth embodiment of the present invention has complementary angles θ ₁ ′, θ ₂ ′ of the two upper chutes 91b and 92b, that is, the two upper chutes 91b and 92b are symmetrical; The angles θ ₃ ′′ and θ ₄ ′ of the two lower chutes 93b and 94b are equal, that is, the two lower chutes 93b and 94b are parallel; that is, the arrangement of the front and back chutes is different. Further, the upper and lower chute axial directions N ₁ and N _{3 are in the} same direction, and N ₂ and N ₄ intersect, and the upper and lower chutes 91b and 93b are completely overlapped, and 92b and 94b are partially overlapped.

Therefore, the single surface of the chute configuration has at least two parallel or symmetrical configurations, and the chute configuration of the front and back sides is combined according to the aspect of the single surface to achieve the anti-slip effect; especially when the fit portion is The handle is horizontal, which is suitable for the right hand and the left hand to operate the same set of parts, and is not limited by the habit of using the left and right. For example, in FIG. 8A, the user can hold the grip 60a of the wrench 50a with the right hand R, the first fitting portion 67a has an inclination angle with the grip 60a, and the thumb is abutted on the upper grip surface 61a. The slot 71a is operated, or as shown in FIG. 8B, the user can operate the upper grip surface 61a with the left hand L; and in FIG. C, the user can grip the grip 60b of the wrench 50b with the right hand R, the first sleeve The portion 67b is horizontal with the handle 60b, and the thumb is abutted against the chute 71b of the upper grip surface 61b and operated, or as shown in FIG. 8D, the user can operate the lower grip surface 62b with the left hand L. The chute 73b is operated and operated. The main purpose of the invention is to provide the user with the effect of preventing slipping when the user operates the one or both sides of the wrench with the left and right hands.

In addition, in order to improve the friction between the thumb and the chute, a slight change in the structure can be made when the chutes are made. As shown in the ninth figure, the curved surface C of the chute 30 has a plurality of protrusions 35, which may be irregularly distributed or distributed longitudinally along the chute, so that the longitudinal sections are not identical but approximate; The purpose of the bumps 35 is to increase the friction, and it is also possible to achieve similar effects without limiting the above. As shown in the tenth figure, the curved surface C of the chute 30 is formed by a plurality of parallel narrow grooves 36 which are axially disposed along the chute so that each of the longitudinal sections is serrated. In addition, the narrow grooves 36 may also be recessed along the longitudinal direction of the handle, or He changes. The foregoing aspects of the chute may make the longitudinal sections not exactly the same but very similar.

The anti-slip wrench of the invention can achieve the anti-slip effect by opening the chute, the structure is simple, and at the same time, the lightweight effect can be achieved, and the consumer can be smartly operated and easy to use, and the manufacturer is relatively low in material and The cost and variation of production; in addition, the inclined grooves designed with small curvature have appropriate depth and do not affect the rigidity and structural strength of the wrench itself. The anti-slip wrench has the advantages of reducing cost and maintaining the original structural strength without increasing the structure. In the case of materials, materials, or other processing methods, production costs and causes can be relatively reduced, thereby increasing industrial competitiveness.

The embodiments are merely illustrative of the invention and are not intended to be limiting. In summary, the anti-slip wrench of the present invention has a simple structure and is easy to operate; it is intended to provide longitudinal and lateral blocking effects in the arrangement of the chute, thereby achieving lateral and longitudinal anti-skid, which is the first structure of the same kind of article. It is progressive, and it is in line with the requirements of invention patents.

10, 50, 50a, 50b, 52, 54, 56, 58‧‧‧ anti-slip wrenches

20, 60, 60a, 60b, 80‧‧ ‧ grip

30, 31, 32, 70, 90‧‧‧ chute

35‧‧‧

36‧‧‧ rill

C‧‧‧Surface

S1, S2‧‧‧ longitudinal section

O‧‧‧Common endpoint

Y‧‧‧handle vertical axis

M, M ₁ , M ₂ , M ₃ , M ₄ , N ₁ , N ₂ , N ₃ , N ₄ ‧‧‧ chute axial

CO‧‧‧ outer edge

CI‧‧‧ inside edge

EO‧‧‧ outer endpoint

EI‧‧ Endpoint

H‧‧‧ horizontal line

21, 61, 81 ‧ ‧ upper grip surface

22, 62, 82‧‧‧ lower grip surface

23, 63, 83‧‧‧ left side

24, 64, 84‧‧‧ right side

27, 67, 67a, 87‧‧‧ first set of joints

28, 68, 88‧‧‧ second set of joints

θ ₁ , θ ₂ , θ ₁ ', θ ₂ ', θ ₃ ', θ ₄ ', θ ₁ ”, θ ₂ ”, θ ₃ ”, θ ₄ ‧ ‧ ‧ angle

71, 72, 91, 92, 91a, 92a‧‧‧ upper chute

73, 74, 93, 94, 93a, 94a‧‧‧ lower chute

The first figure is a perspective view of a first embodiment of the anti-slip wrench of the present invention; the second figure is a partial enlarged view of the first figure; and the second figure A and B are respectively shown along the second figure. A cross-sectional view of the line A and B; a third view of the second embodiment of the present invention; a third view of the third view; a third view of the third view; The bottom view is a side view of the third figure; the fourth figure is a perspective view of the third embodiment of the present invention; and the fifth figure is a fourth embodiment of the present invention. FIG. 5 is a top view of the fifth figure; FIG. 5B is a bottom view of the fifth figure; and FIG. 6 is a perspective view of the fifth embodiment of the present invention; 7 is a perspective view of a sixth embodiment of the present invention; and FIG. 8B is a schematic diagram of the application of the handle with a right hand and a left hand, respectively, and the eighth embodiment of the CD, the present invention is respectively a right hand. The application diagram of the front and back of the handle is operated by the left hand; the ninth figure shows a part of one of the embodiments of the chute of the present invention. Shown a partial perspective view of another aspect of the chute system and a tenth embodiment of the present invention FIG.; FIG thereof.

50‧‧‧Slip wrench

60‧‧‧Handle

70‧‧‧ chute

71, 72‧‧‧ upper chute

73, 74‧‧‧ lower chute

61‧‧‧Upper grip surface

62‧‧‧Under grip surface

63‧‧‧ left side

64‧‧‧ right side

67‧‧‧First set of joints

68‧‧‧Second set of joints

M1, M2, M3, M4‧‧‧ chute axial

Claims (17)

An anti-slip wrench comprising: a handle having two grip faces corresponding to the upper and lower sides, two sides corresponding to the left and right, and a set of joints disposed at at least one end thereof; and at least one chute recessed in the handle At least one gripping surface, and the two ends thereof extend through the two sides of the grip; each of the chutes has a curved surface and two side edges that are intersected by the curved surface and the grip; wherein the chute of the chute An angle is formed at an angle with the longitudinal axis of the handle; whereby the user can operate the curved surface with the thumb attached thereto, and the chute provides longitudinal and lateral slip prevention for the user. The anti-slip wrench of claim 1, wherein the distance between the two side edges is shorter than one knuckle. An anti-slip wrench as described in claim 1, wherein the two side edges respectively have two ends, which are end points away from the center of the chute, and inner end points near the center of the chute, and within the two side edges The endpoints approach the same horizontal line. The anti-slip wrench of claim 1, wherein the curved surface of each of the chutes has a plurality of parallel rills. The anti-slip wrench of claim 1, wherein the curved surface of each of the chutes has a plurality of bumps. The anti-slip wrench according to any one of claims 1-5, wherein the two chutes disposed on the same gripping surface are equal or complementary. The anti-slip wrench of claim 6, wherein the two chutes are disposed on different gripping surfaces, and the two chutes are in the same direction or intersect. The non-slip wrench according to any one of claims 1-5, wherein the two chutes are disposed on different grip faces, and the two chutes are in the same direction or intersect. An anti-slip wrench that can be operated by both right and left hands, including: a handle having two grip faces corresponding to the upper and lower sides, two sides corresponding to the left and right, and a set of joints disposed at at least one end thereof; and a plurality of chutes recessed on the two grip faces of the handle, and The two ends extend through the two sides of the handle; each of the chutes has a curved surface and two parallel side edges that are intersected by the curved surface and the handle; wherein the oblique groove of the inclined groove is axially opposite to the handle The shaft is at an angle; thereby, the user can attach the curved surface to the user, and the inclined groove provides longitudinal and lateral slip resistance of the user; the inclined grooves are disposed on both sides of the grip, so that the user can use the right and left hands to reverse Operation. An anti-slip wrench according to claim 9, wherein the two side edges respectively have two ends, which are end points away from the center of the chute, and inner end points near the center of the chute, and within the two side edges The endpoints approach the same horizontal line. An anti-slip wrench as described in claim 9 wherein the distance between the two side edges is shorter than one knuckle. An anti-slip wrench as described in claim 9 wherein the fitting portion is horizontal to the grip. The anti-slip wrench of claim 9, wherein the curved surface of each of the chutes has a plurality of parallel rills. The anti-slip wrench of claim 9, wherein the curved surface of each of the chutes has a plurality of bumps. The anti-slip wrench according to any one of claims 9-14, wherein the two chutes disposed on the same gripping surface are equal or complementary. The anti-slip wrench of claim 15, wherein the two chutes are disposed on different grip faces, and the two chutes are in the same direction or intersect. The anti-slip wrench according to any one of claims 9-14, wherein the two chutes are disposed on different grip faces, and the two chutes are axially oriented or intersecting.