Ratchet wrench structure

Abstract

To provide a ratchet wrench structure capable of reducing the manufacturing cost of components. [Solution] The ratchet wrench structure comprises a main body (10), a ratchet (20), a control tooth (30), a restricting member (40), an elastic member (50), and a ring (60). The main body has a first storage tank (11) at one end. The first storage tank is formed in a circular shape. A second storage tank (12) is formed on one side of the first storage tank. The second storage tank is connected to the first storage tank. The diameter of the second storage tank is smaller than the diameter of the first storage tank. The center of the second storage tank is located within the area of ​​the first storage tank. Both the upper and lower sides of the second storage tank are closed. The first storage tank has a first ring groove (13). The first ring groove is formed in a concave annular shape. The first ring groove is located near the opening at the bottom. The first storage tank has a first abutment (14). The first abutment is located near the opening at the top.

Description

[Technical Field]

[0001] The present invention relates to a ratchet wrench structure, and more particularly to a ratchet wrench structure in which a first abutment surface in the ratchet wrench structure has a first width and a second width, a first diameter is approximately equal to the first width and the second width, and when a first end abuts against the first abutment surface, the first end is restricted by the first abutment surface, the second abutment surface, and the third abutment surface, and a recess prevents the first end from displacing up, down, left, or right, and restricts the first end. [Background technology]

[0002] Conventional ratchet wrench structures include, for example, "Improved structure of one-way ratchet wrench that is easy to assemble" (Patent Documents 1 and 2).

[0003] The "Improved Structure of an Easy-to-Assemble One-Way Ratchet Wrench" of Patent Documents 1 and 2 mentioned above includes a ratchet wrench body, with a receiving hole formed through the ratchet head of the ratchet wrench body. A ratchet is attached to the receiving hole. A ratchet surface is formed on the outer circumferential surface of the ratchet. An inwardly recessed arc-shaped groove is formed on the side wall surface of the receiving hole, and the arc-shaped member is composed of an arc-shaped group block, a spring, and a ratchet block.

[0004] However, the conventional ratchet wrench structure has the following drawbacks (1) to (3). (1) As shown in the exploded view of the arc-shaped member in Figure 2 of Patent Document 2, a spring applies a biasing force between the arc-shaped group block and the ratchet block. The spring has a soft structure, and a spring accommodating hole for accommodating the end of the spring is provided in the arc-shaped group block to prevent the spring from slipping out of the arc-shaped group block. However, the arc-shaped group block is metal injection molded, and the arc-shaped group block cannot be integrally molded with the spring accommodating hole in the mold, so the spring accommodating hole had to be drilled. In smaller ratchet wrench structures, the volume of the arc-shaped group block is not large, and the inner diameter of the spring accommodating hole is also small. There was also the issue of the position of the spring accommodating hole, which made drilling the spring accommodating hole time-consuming. (2) The spring is assembled between the protruding post and the spring receiving hole. During actual assembly, the assembly worker must use both hands to align one end of the spring with the spring receiving hole and then align and insert the other end of the spring into the protruding post. In the case of a smaller-sized ratchet wrench structure, the diameters of the spring receiving hole and the protruding post are small, and both must be inserted. This makes the assembly between the arc-shaped group block, spring, and ratchet block very inconvenient. (3) The arc-shaped group block has an extended vane. The arc-shaped group block must be made by metal injection molding, and the extended vane is formed in a plate shape. The upper and lower molds for the arc-shaped group block must mold the extended vane corresponding to the plate-shaped space. The upper and lower molds for the arc-shaped group block are not easy to manufacture. The extended vane is also not easy to mold. Therefore, the cost of the upper and lower molds for the arc-shaped group block is relatively high. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] U.S. Patent No. 8,272,297 B1 [Patent Document 2] Taiwan Utility Model Registration No. M423025 Summary of the Invention [Problem to be solved by the invention]

[0006] The main objective of the present invention is to provide a ratchet wrench structure in which the end of a spring is accommodated in a spring receiving hole in a conventional ratchet wrench structure, but because the arc-shaped block must be metal injection molded, the spring receiving hole cannot be integrally formed in a mold and must be drilled. In contrast, the first abutment surface in the ratchet wrench structure of the present invention has a first width and a second width, and a first diameter that is approximately equal to the first width and the second width. When the first end abuts against the first abutment surface, the first end is restricted by the first abutment surface, the second abutment surface, the third abutment surface, and the second receiving groove, and the groove prevents the first end from displacing up, down, left, or right, and restricts the first end. [Means for solving the problem]

[0007] In order to solve the above problems, according to a first aspect of the present invention, there is provided a ratchet wrench structure comprising a main body, a ratchet, a control tooth, a limiting member, an elastic member, and a ring, wherein the main body has a first container at one end, the first container is formed in a circular container shape, and a second container is formed on one side of the first container, the second container is connected to the first container, the diameter of the second container is smaller than the diameter of the first container, the center of the second container is located within the area of ​​the first container, and both the upper and lower sides of the second container are closed, the first container has a first ring groove, and the first container has a second ring groove. The ring groove is formed in the shape of a concave annular tank, a first ring groove is provided near the bottom opening, the first storage tank has a first abutment portion, the first abutment portion is provided near the upper opening, when viewed in a two-dimensional plane, the first storage tank forms a first circle, the first circle has a first center, a vertical line is set around the first center as an axis, the first circle has a first radius, the second storage tank forms a second circle, the second circle has a second center, the second center is located within the area of ​​the first circle, the second circle has a second radius, the second radius is smaller than the first radius, a distance from the center of the first circle to the center of the second circle is a first distance, and a first corner is provided at the intersection of the first circle and the second circle; the ratchet is pivotally mounted in the first container; a ratchet portion is provided on the outer circumferential surface of the ratchet; the ratchet portion is formed in an annular arrangement of teeth; the ratchet has a fitting portion; the ratchet has a second ring groove; the second ring groove is aligned with the first ring groove; the second ring groove is formed in a concave annular groove; the ratchet has a second abutting portion; the second abutting portion abuts against the first abutting portion; and the brake tooth abuts against one side of the second container. The ratchet portion is accommodated in the brake teeth, and a front side of the brake teeth has meshing teeth, the meshing teeth mesh with the ratchet portion, the meshing teeth have a first arc portion, the first arc portion is formed in a convex arc shape, and both sides of the first arc portion have second arc portions, the two second arc portions are formed symmetrically with respect to the first arc portion, and the second arc portions are formed in a concave arc shape, and a connecting arc is provided between the first arc portion and the second arc portion, the two connecting arcs are formed symmetrically with respect to the first arc portion, the connecting arc is formed in a substantially arc shape, the connecting arc is tangent to the first arc portion, and the connecting arc and the second arc portion are formed in a tangent shape, and the first arc portion has a third radius;the second arc portion has a fourth radius, the numerical value of which is equal to or approximately equal to the numerical value of the third radius; a recess is provided at one end of the brake tooth, the recess has a first abutment surface, a second abutment surface, and a third abutment surface, the first abutment surface, the second abutment surface, and the third abutment surface are arranged approximately perpendicular to each other, the first abutment surface, the second abutment surface, and the third abutment surface are formed in a flat shape; the first abutment surface has a first width and a second width, the first width and the second width are arranged perpendicular to each other, the numerical value of the first width is equal to the numerical value of the second width; and a first surface is provided at the rear center of the brake tooth; The first surface is in contact with the wall surface of the second container, and is formed in a convex arc shape or an arc shape. One side of the first surface has a second surface, and the second surface is located between the first surface and the container. The second surface is not in contact with the wall surface of the second container, and is formed in a flat, convex arc shape or an arc shape. The other side of the first surface has a third surface, and the third surface is formed in a flat, convex arc shape or an arc shape. The other end of the brake tooth is provided with an edge, which is away from the container and is located between the third surface and the meshing tooth. The teeth of the meshing tooth are connected to each other to form a first arc, and the first arc and the first The third surface forms a second arc, and the second arc has the same radius as the second circle. A second corner is provided at the intersection of the first arc and the second arc. The second corner and the first corner are close to each other. A space is formed between the first arc, the second arc, and the edge. The edge does not contact the first corner or the second corner. The brake tooth does not contact the first corner or the second corner. The limiting member is accommodated in the second accommodation vessel while abutting against the other side. A fourth surface is provided on the front side of the limiting member. The fourth surface faces the ratchet portion. The surface is formed in a concave arc shape, a fifth surface is provided on one side of the limiting member, the fifth surface faces the recessed tank, the fifth surface is formed in a flat shape, the fifth surface and the first abutment surface are formed parallel or approximately parallel to each other, a sixth surface is provided on the rear side of the limiting member, the sixth surface abuts on the wall surface of the second containing tank, the sixth surface is formed in a convex arc shape, the limiting member has a first abutment edge, the first abutment edge faces the second abutment surface, the first abutment edge is provided between the fourth surface and the fifth surface, the first abutment edge is formed in a bump shape, a portion of the elastic member is accommodated in the recessed tank, and the elastic member isA biasing force is applied between the first abutment surface and the fifth surface, causing the meshing teeth and the ratchet portion to mesh with each other, one end of the elastic member has a first end, the first end abuts on the first abutment surface, the first end has a first diameter, the dimension value of the first diameter is equal to the dimension values ​​of the first width and the second width, the other end of the elastic member has a second end, the second end abuts on the fifth surface, the second end has a second diameter, the dimension value of the second diameter is smaller than the dimension value of the first diameter, the dimension value of the first diameter is equal to the dimension values ​​of the first width and the second width, the first end is abutted on the first abutment surface, the second abutment surface, the third abutment surface and the second receiving groove, the first end is positioned in the groove and prevented from moving up and down or left and right in the groove, the groove can restrict the first end, the second end is restricted by the first abutting edge and prevented from coming off the second receiving groove, the elastic member applies a biasing force between the brake tooth and the restricting member to prevent from coming off the second receiving groove, the ring is formed into a C-shaped annular body and has slight elasticity, when the ring is received in the first ring groove and the second ring groove, the ratchet is pivoted to the first receiving groove. [Effects of the Invention]

[0008] In the ratchet wrench structure of the present invention, the first abutment surface has a first width and a second width, and the first diameter is approximately equal to the first width and the second width. When the first end abuts against the first abutment surface, the first end is confined by the first abutment surface, the second abutment surface, the third abutment surface, and the second receiving groove, preventing the first end from moving up, down, left, or right and restricting the first end. The first diameter is approximately equal to the first width and the second width. That is, the first end has a larger first diameter. A larger abutment area is provided between the first end and the first abutment surface. The larger receiving abutment area ensures the generation of a biasing force between the two. The second end abuts against the fifth surface. The second end is located within the first abutment edge. The second end is confined by the first abutment edge. The second end is prevented from coming out of the second receiving groove. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is an exploded perspective view of a ratchet wrench structure according to a first embodiment of the present invention; FIG. [Figure 2] 1 is a plan view showing the main body of the ratchet wrench structure according to the first embodiment of the present invention; FIG. [Figure 3] 1 is a plan view showing the control teeth of the ratchet wrench structure according to the first embodiment of the present invention; FIG. [Figure 4] FIG. 4 is a partial enlarged view of part A in FIG. 3. [Figure 5] FIG. 2 is a perspective view of the control teeth of the ratchet wrench structure according to the first embodiment of the present invention, viewed from another angle. [Figure 6] 1 is a plan view showing a limiting member of a ratchet wrench structure according to a first embodiment of the present invention; FIG. [Figure 7] 1 is a plan view showing an elastic member of a ratchet wrench structure according to a first embodiment of the present invention; FIG. [Figure 8] 1 is an assembled perspective view of a ratchet wrench structure according to a first embodiment of the present invention; FIG. [Figure 9] 1 is a side view of a ratchet wrench structure according to a first embodiment of the present invention; FIG. [Figure 10] FIG. 10 is a cross-sectional view taken along line AA in FIG. 9. [Figure 11] 10 is a plan view showing an elastic member of a ratchet wrench structure according to a second embodiment of the present invention; FIG. [Figure 12] FIG. 10 is an exploded perspective view of a ratchet wrench structure according to a third embodiment of the present invention. [Figure 13] FIG. 10 is a perspective view showing a limiting member of a ratchet wrench structure in accordance with a third embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0010] (First embodiment) Please refer to Figures 1 to 8. FIG. 1 is an exploded perspective view of a ratchet wrench structure according to a first embodiment of the present invention. FIG. 2 is a plan view of the body 10 of the ratchet wrench structure according to the first embodiment of the present invention. FIG. 3 is a plan view of the pawl 30 of the ratchet wrench structure according to the first embodiment of the present invention. FIG. 4 is a partially enlarged view of portion A in FIG. 3. FIG. 5 is a perspective view of the pawl 30 of the ratchet wrench structure according to the first embodiment of the present invention from another angle. FIG. 6 is a plan view of the limiting member 40 of the ratchet wrench structure according to the first embodiment of the present invention. FIG. 7 is a plan view of the elastic member 50 of the ratchet wrench structure according to the first embodiment of the present invention. FIG. 8 is an assembled perspective view of the ratchet wrench structure according to the first embodiment of the present invention.

[0011] The ratchet wrench structure according to the first embodiment of the present invention comprises a body 10, a ratchet 20, a restricting tooth 30, a restricting member 40, an elastic member 50 and a ring 60.

[0012] The main body 10 has a first storage tank 11 at one end. The first storage tank 11 is formed in a circular tank shape. A second storage tank 12 is formed on one side of the first storage tank 11. The second storage tank 12 is connected to the first storage tank 11. The diameter of the second storage tank 12 is smaller than the diameter of the first storage tank 11. The center of the second storage tank 12 is located within the area of ​​the first storage tank 11. Both the top and bottom sides of the second storage tank 12 are closed. The first storage tank 11 has a first ring groove 13. The first ring groove 13 is formed in a concave annular tank shape. The first ring groove 13 is located near the opening at the bottom. The first storage tank 11 has a first abutment portion 14. The first abutment portion 14 is located near the opening at the top.

[0013] When viewed on a two-dimensional plane, the first storage tank 11 forms a first circle 15. The first circle 15 has a first center 152, and a vertical line 152 is set with the first center 152 as its axis. The first circle 15 has a first radius 153. The second storage tank 12 forms a second circle 154. The second circle 154 has a second center 155. The second center 155 is located within the area of ​​the first circle 15. The second circle 154 has a second radius 156. The second radius 156 is smaller than the first radius 153. The distance from the first center 152 to the second center 155 is a first distance 157. A first corner 158 is provided at the point where the first circle 15 and the second circle 154 intersect.

[0014] The ratchet 20 is pivotally mounted within the first housing 11. A ratchet portion 21 is provided on the outer circumferential surface of the ratchet 20. The ratchet portion 21 is formed in the shape of teeth arranged in an annular pattern. A mating portion 22 is provided within the ratchet 20. The mating portion 22 is formed in the shape of a dodecagonal groove, a polygonal groove, or a protruding square head. The ratchet 20 has a second ring groove 23. The second ring groove 23 is aligned with the first ring groove 13. The second ring groove 23 is formed in the shape of a concave annular groove. The ratchet 20 has a second abutment portion 24. The second abutment portion 24 abuts against the first abutment portion 14.

[0015] The brake teeth 30 are accommodated in the second storage tank 12, abutting against one side thereof. The front side of the brake teeth 30 has meshing teeth 31. The meshing teeth 31 mesh with the ratchet portion 21. The meshing teeth 31 have a first arc portion 311. The first arc portion 311 is formed in a convex arc shape. Both sides of the first arc portion 311 each have a second arc portion 312. The two second arc portions 312 are formed symmetrically with respect to the first arc portion 311. The second arc portion 312 is formed in a concave arc shape. A connecting arc 313 is provided between the first arc portion 311 and the second arc portion 312. The two connecting arcs 313 are formed symmetrically with respect to the first arc portion 311. The connecting arc 313 is formed in a substantially arc shape. The connecting arc 313 is tangent to the first arc portion 311. The connecting arc 313 and the second arc portion 312 are formed in the shape of a tangent circle.

[0016] First arc portion 311 has a third radius 314. Second arc portion 312 has a fourth radius 315. The numerical dimensions of fourth radius 315 are equal to or approximately equal to the numerical dimensions of third radius 314.

[0017] A recess 32 is provided at one end of the brake tooth 30. The recess 32 has a first abutment surface 321, a second abutment surface 322, and a third abutment surface 323. The first abutment surface 321, the second abutment surface 322, and the third abutment surface 323 are arranged approximately perpendicular to one another. The first abutment surface 321, the second abutment surface 322, and the third abutment surface 323 are formed flat. The first abutment surface 321 has a first width 324 and a second width 325. The first width 324 and the second width 325 are formed perpendicular to one another. The dimensional value of the first width 324 is equal to the dimensional value of the second width 325.

[0018] A first surface 33 is provided at the rear center of the brake tooth 30. The first surface 33 abuts against the wall surface of the second storage tank 12. The first surface 33 is formed in a convex arc shape or an arc shape. One side of the first surface 33 has a second surface 34. The second surface 34 is provided between the first surface 33 and the groove 32. The second surface 34 does not abut against the wall surface of the second storage tank 12. The second surface 34 is formed in a flat shape, a convex arc shape, or an arc shape. A third surface 35 is provided on the other side of the first surface 33. The third surface 35 is formed in a flat shape, a convex arc shape, or an arc shape. An edge 36 is provided at the other end of the brake tooth 30. The edge 36 is away from the groove 32. The edge 36 is provided between the third surface 35 and the engaging tooth 31.

[0019] The teeth of the meshing teeth 31 connect to each other to form a first arc 37. The first arc 37 and the first circle 154 are coaxial and have approximately equal dimensions. The first surface 33 forms a second arc 371. The second arc 371 has the same radius as the second circle 154. A second corner 372 is provided where the first arc 37 and the second arc 371 intersect. The second corner 372 and the first corner 158 are located close to each other. A space 373 is formed between the first arc 37, the second arc 371, and the edge 36. That is, the edge 36 does not contact the first corner 158 or the second corner 372. The brake tooth 30 does not contact the first corner 158 or the second corner 372.

[0020] The restricting member 40 is accommodated in the second storage tank 12 and abuts against the other side thereof. A fourth surface 41 is provided on the front side of the restricting member 40. The fourth surface 41 faces the ratchet portion 21. The fourth surface 41 is formed in a concave arc shape. A fifth surface 42 is provided on one side of the restricting member 40. The fifth surface 42 faces the recessed tank 32. The fifth surface 42 is formed in a flat shape. The fifth surface 42 and the first abutment surface 321 are formed parallel or approximately parallel to each other. A sixth surface 43 is provided on the rear side of the restricting member 40. The sixth surface 43 abuts against the wall surface of the second storage tank 12. The sixth surface 43 is formed in a convex arc shape. The restricting member 40 has a first abutment edge 44. The first abutment edge 44 faces the second abutment surface 322. The first abutment edge 44 is provided between the fourth surface 41 and the fifth surface 42. The first abutment edge 44 is formed in a bump shape.

[0021] A portion of the elastic member 50 is housed in the recess 32. The elastic member 50 applies a biasing force between the first abutment surface 321 and the fifth surface 42, causing the meshing teeth 31 and the ratchet portion 21 to mesh with each other. One end of the elastic member 50 has a first end 51. The first end 51 abuts on the first abutment surface 321. The first end 51 has a first diameter 52. The numerical value of the first diameter 52 is equal to the numerical values ​​of the first width 324 and the second width 325. The other end of the elastic member 50 has a second end 53. The second end 53 abuts on the fifth surface 42. The second end 53 has a second diameter 54. The numerical value of the second diameter 54 is smaller than the numerical value of the first diameter 52. The elastic member 50 is a spring body.

[0022] The first diameter 52 has a dimension equal to the dimension values ​​of the first width 324 and the second width 325. The first end 51 is restricted by the first abutment surface 321, the second abutment surface 322, the third abutment surface 323, and the second container 12. The first end 51 is positioned in the container 32. The first end 51 prevents the container 32 from displacing up and down or left and right. The length, width, and height of the container 32 can restrict the first end 51. The second end 53 is restricted by the first abutment edge 44. The second end 53 prevents the container 30 from coming off the second container 12. The elastic member 50 applies a biasing force between the stopper tooth 30 and the restricting member 40, preventing the container 30 from coming off the second container 12.

[0023] The ring 60 is formed into a C-shaped annular body and has slight elasticity, so that when the ring 60 is received in the first ring groove 13 and the second ring groove 23, the ratchet 20 is pivotally attached to the first storage tank 11.

[0024] Please refer to Figures 9 and 10. Figure 9 is a side view of a ratchet wrench structure according to a first embodiment of the present invention. Figure 10 is a cross-sectional view taken along line AA in Figure 9. The ratchet 20 is pivotally mounted within the first housing 11. The control teeth 30 are housed on one side within the second housing 12. The restricting member 40 is housed on the other side within the second housing 12. The elastic member 50 applies a biasing force between the first abutment surface 321 and the fifth surface 42, causing the engaging teeth 31 to engage with the ratchet portion 21. When the main body 10 is rotated clockwise, the ratchet 20 is rotated by the main body 10.

[0025] (Second embodiment) Please refer to Figure 11. FIG. 11 is a plan view showing the elastic member 50 of the ratchet wrench structure according to the second embodiment of the present invention.

[0026] As shown in FIG. 11, the ratchet wrench structure according to the second embodiment of the present invention has a smaller difference in the dimensional values ​​between the first diameter 52 and the second diameter 54, and the spring winding spacing (pitch) is smaller near the first end 51 or the second end 53.

[0027] (Third embodiment) Please refer to Figures 12 and 13. FIG. 12 is an exploded perspective view of a ratchet wrench structure according to a third embodiment of the present invention. FIG. 13 is a perspective view of a limiting member of the ratchet wrench structure according to the third embodiment of the present invention. As shown in FIGS. 12 and 13, the limiting member 40 has a second abutment edge 45 in addition to a first abutment edge 44. The second abutment edge 45 and the first abutment edge 44 are formed perpendicular or substantially perpendicular to each other. The first abutment edge 44 and the second abutment edge 45 limit the second end 53. The first end 51 and the second end 53 of the elastic member 50 have the same diameter. That is, the second diameter 54 is equal to the first diameter 52.

[0028] The ratchet wrench structure according to the present invention has the following advantages (1) to (6). (1) The first abutment surface 321 has a first width 324 and a second width 325. The first diameter 52 is approximately equal to the first width 324 and the second width 325. When the first end 51 abuts against the first abutment surface 321, the first end 51 is restricted by the first abutment surface 321, the second abutment surface 322, the third abutment surface 323, and the second storage tank 12, preventing the first end 51 from displacing up, down, left, or right in the recessed tank 32. In other words, the recessed tank 32 restricts the first end 51. (2) The first diameter 52 is approximately equal to the first width 324 and the second width 325. That is, the first end 51 has a larger first diameter 52. A larger contact area is provided between the first end 51 and the first contact surface 321. Because a larger contact area is provided between them, a biasing force can be reliably generated between them. (3) The second end 53 abuts on the fifth surface 42. The second end 53 is located within the first abutment edge 44. The second end 53 is restricted by the first abutment edge 44, preventing the second end 53 from coming off the second storage tank 12. Because the second diameter 54 is smaller, when the brake tooth 30 retracts, the second end 53 abuts on the fifth surface 42 due to a concentrated biasing force. (4) First, the brake teeth 30, the limiting member 40 and the elastic member 50 are assembled on the outside of the main body 10, and then the brake teeth 30, the limiting member 40 and the elastic member 50 are supported by hand to form a large contact surface between the first end 51 and the recessed groove 32, and the second end 53 is contacted with the fifth surface 42, so that the second end 53 is engaged with the first contact edge 44, and the brake teeth 30, the limiting member 40 and the elastic member 50 can be more easily assembled into the second storage groove 12. (5) The limiting member 40 is accommodated in the second accommodation vessel 12. That is, the limiting member 40 can limit the maximum retraction range of the brake teeth 30. The smaller the retraction distance of the brake teeth 30, the easier it is to advance the brake teeth 30. (6) The brake tooth 30 has a simple structure and is easy to process, and no other processing steps are required after the brake tooth 30 is metal injection molded, which reduces the manufacturing costs of the brake tooth 30. In addition, the limiting member 40 has a simple structure and no other processing steps are required after the limiting member 40 is injection molded, which reduces the manufacturing costs of the member. [Explanation of symbols]

[0029] 10 Main Unit 11 First Containment Tank 12 Second Containment Tank 13 First ring groove 14 First contact portion 15 First Circle 20 Ratchet 21 Ratchet section 22 Fitting part 23 Second ring groove 24 Second contact portion 30 pawl 31 Occluding teeth 32 Concave tank 33 First Side 34 Second Side 35 The Third Side 36 Edge 37 First Arc 40 Restricting member 41 The Fourth Side 42 The Fifth Side 43 The Sixth Side 44 First abutment edge 45 Second abutment edge 50 Elastic member 51 First Edge 52 First Diameter 53 Second End 54 Second Diameter 60 Rings 151 First Center 152 vertical line 153 First Radius 154 Second Circle 155 Second Center 156 Second Radius 157 First Distance 158 First Corner 311 First Arc 312 Second Arc 313 Connecting Arc 314 Third Radius 315 Fourth Radius 321 First contact surface 322 Second abutment surface 323 Third abutment surface 324 First Width 325 Second Width 371 Second Arc 372 Second Corner 373 Space

Claims

1. A ratchet wrench structure comprising a body, a ratchet, a control tooth, a limiting member, an elastic member and a ring, The main body has a first container at one end, the first container being circular, and a second container being formed on one side of the first container, the second container being in communication with the first container, the diameter of the second container being smaller than the diameter of the first container, the center of the second container being located within the area of ​​the first container, and both the upper and lower sides of the second container being closed, the first container having a first ring groove, the first ring groove being formed in a concave annular shape, the first ring groove being located near the opening at the bottom, and the first container having a first abutment, the first abutment being located near the opening at the top; When viewed on a two-dimensional plane, the first storage tank forms a first circle, the first circle has a first center, and a vertical line is set to the first center as an axis, the first circle has a first radius, the second storage tank forms a second circle, the second circle has a second center, and the second center is located within the area of ​​the first circle, the second circle has a second radius, and the second radius is smaller than the first radius, the distance from the first center to the second center is a first distance, and a first corner is set at the point where the first circle and the second circle intersect, The ratchet is pivotally mounted in the first housing tank, and has a ratchet portion on its outer circumferential surface, the ratchet portion being formed in an annular arrangement of teeth, the ratchet having a fitting portion, a second ring groove being aligned with the first ring groove, the second ring groove being formed in a concave annular tank shape, the ratchet having a second abutment portion being abutted against the first abutment portion, The brake teeth are accommodated in the second receiving vessel by abutting against one side thereof, and the front sides of the brake teeth have meshing teeth which mesh with the ratchet portion, and the meshing teeth have a first arc portion, and the first arc portion is formed in a convex arc shape, and both sides of the first arc portion have second arc portions, and the two second arc portions are formed symmetrically with respect to the first arc portion, and the second arc portions are formed in a concave arc shape, and a connecting arc is provided between the first arc portion and the second arc portion, and the two connecting arcs are formed symmetrically with respect to the first arc portion, and the connecting arc is formed in a substantially arc shape, and the connecting arc is tangent to the first arc portion, and the connecting arc and the second arc portion are formed in a tangent shape, the first arc has a third radius, the second arc has a fourth radius, the fourth radius having a numerical dimension equal to or approximately equal to the numerical dimension of the third radius; One end of the brake tooth is provided with a recess, the recess having a first abutment surface, a second abutment surface, and a third abutment surface, the first abutment surface, the second abutment surface, and the third abutment surface are arranged approximately perpendicular to each other, the first abutment surface, the second abutment surface, and the third abutment surface are formed in a flat shape, the first abutment surface has a first width and a second width, the first width and the second width are formed perpendicular to each other, and the dimensional value of the first width is equal to the dimensional value of the second width, A first surface is provided at the rear center of the brake tooth, the first surface abuts against the wall surface of the second storage tank, and is formed in a convex arc shape or an arc shape. One side of the first surface has a second surface, and the second surface is located between the first surface and the recessed tank, and the second surface does not abut against the wall surface of the second storage tank, and is formed in a flat shape, a convex arc shape or an arc shape. A third surface is provided on the other side of the first surface, and the third surface is formed in a flat shape, a convex arc shape or an arc shape. An edge is provided at the other end of the brake tooth, the edge is away from the recessed tank, and the edge is located between the third surface and the engaging tooth. the teeth of the meshing teeth are connected to each other to form a first arc, the first arc and the first circle are coaxial and have approximately equal dimensional values; the third surface forms a second arc, the second arc has the same radius as the second circle; a second corner is provided at the intersection of the first arc and the second arc, the second corner and the first corner are positioned close to each other, a space is formed between the first arc, the second arc and the edge, and the edge does not contact the first corner or the second corner; and the brake teeth do not contact the first corner or the second corner; The restricting member is accommodated in the second container and abuts against the other side thereof. The restricting member has a fourth surface on the front side thereof, which faces the ratchet portion and is formed in a concave arc shape. The restricting member has a fifth surface on one side thereof, which faces the concave container and is formed in a flat shape. The fifth surface and the first abutment surface are parallel or approximately parallel to each other. The restricting member has a sixth surface on the rear side thereof, which abuts against the wall surface of the second container and is formed in a convex arc shape. The restricting member has a first abutment edge, which faces the second abutment surface and is located between the fourth surface and the fifth surface, and the first abutment edge is formed in a bump shape. a portion of the elastic member is accommodated in the recess, and the elastic member applies a biasing force between the first abutment surface and the fifth surface, causing the meshing teeth and the ratchet portion to mesh with each other; one end of the elastic member has a first end, the first end abuts on the first abutment surface, the first end has a first diameter, and the dimensional value of the first diameter is equal to the dimensional values ​​of the first width and the second width; the other end of the elastic member has a second end, the second end abuts on the fifth surface, the second end has a second diameter, and the dimensional value of the second diameter is smaller than the dimensional value of the first diameter; The first diameter dimension is equal to the first width and the second width dimension, the first end is restricted by the first abutment surface, the second abutment surface, the third abutment surface and the second container, the first end is positioned in the container and prevents the first end from moving up and down or left and right in the container, the container can restrict the first end, the second end is restricted by the first abutment edge and prevents the second end from coming off the second container, and the elastic member applies a biasing force between the restricting tooth and the restricting member to prevent the second end from coming off the second container, The ring is formed into a C-shaped annular body and has slight elasticity, and when the ring is received in the first ring groove and the second ring groove, the ratchet is pivotally attached to the first receiving tank.

2. The ratchet wrench structure according to claim 1 , wherein the fitting portion is formed as a dodecagonal groove, a polygonal groove, or a protruding square head.

3. 2. The ratchet wrench structure according to claim 1, wherein the elastic member is a spring.

4. The difference in size between the first diameter and the second diameter is small, 2. The ratchet wrench structure according to claim 1, wherein the winding pitch of the spring is smaller at a point near the first end or at a point near the second end.

5. The restricting member has a second abutment edge in addition to the first abutment edge, 2. The ratchet wrench structure according to claim 1, wherein the second abutment edge and the first abutment edge are formed in a perpendicular or substantially perpendicular plane relative to each other, the first abutment edge and the second abutment edge limit the second end, the diameters of the first end and the second end of the elastic member are the same, and the dimensional value of the second diameter is equal to the dimensional value of the first diameter.

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