Ratchet wrench structure

Abstract

Ratchet key structure, which includes: a main body (10) having a first receiving chamber (11) which is circular throughout, wherein the first receiving chamber (11) is provided on one side near the handle with a second receiving chamber (12), wherein the diameter of the second receiving chamber (12) is smaller than the diameter of the first receiving chamber (11), wherein the center of the second receiving chamber (12) is located within the area of ​​the first receiving chamber (11), wherein the second receiving chamber (12) is connected to the first receiving chamber (11), wherein the two ends of the second receiving chamber (12) are closed, wherein the top of the second receiving chamber (12) is provided with a first contact surface (121) and the bottom of the second receiving chamber (12) with a second contact surface (122), wherein the second receiving chamber (12) is provided on one side near the handle with a third receiving chamber (13), wherein the third recording room (13) is connected to the second recording room (12), wherein the top of the third receiving chamber (13) is open, wherein the depth of the third receiving chamber (13) is greater than the depth of the second receiving chamber (12), wherein a first hinge part (131) is provided at the bottom of the third receiving chamber (13), wherein a first circle (132) is formed with the center of the third receiving chamber (13) as the center of the circle, wherein the third receiving chamber (13) is provided with a recess (14) near the handle, wherein the recess (14) is connected to the third receiving chamber (13), wherein the opening of the third receiving chamber (13) is located in the region of the recess (14), wherein a first contact surface (141) and a second contact surface (142) are formed on the left and right sides of the recess (14), wherein a first annular groove (15) is formed near the opening of one end of the first receiving chamber (11), wherein the first annular groove (15) has a circular shape,and wherein the main body (10) has a first end surface (16) on its upper side; , a ratchet wheel (20) rotatably mounted in the first receiving space (11), wherein the ratchet wheel (20) has an annular tooth section (21) on its outer circumference, wherein the ratchet wheel (20) is provided with a second annular groove (23) which is aligned with the first annular groove (15), and wherein the second annular groove (23) has a circular ring shape; A pawl (30) is arranged on one side of the second receiving space (12), the pawl (30) being controlled to be displaced left and right in the second receiving space (12), one end of the pawl (30) being in contact with the first contact surface (121), the front of the pawl (30) forming a tooth segment (31), the tooth segment (31) engaging in the tooth section (21), the center of the rear of the pawl (30) being provided with an arc groove (32), the arc groove (32) having a first surface (321) and two second surfaces (322), the first surface (321) being located in the center of the arc groove (32), being a concave arc surface, having the shape of a single arc surface and an inner diameter, the two second surfaces (322) being located on two sides of the arc groove (32), symmetrically to the first surface (321) are and have the shape of a concave arc surface,wherein the second surfaces (322) have the shape of a single arc surface and an inner diameter, wherein the inner diameter of the second surfaces (322) is smaller than the inner diameter of the first surface (321), wherein the second surfaces (322) are tangential to the first surface (321), wherein the two sides of the back of the pawl (30) each form a first contact section (323), , wherein the arc groove (32) lies between the two first contact sections (323), wherein the two first contact sections (323) are symmetrical to the arc groove (32), wherein the arc groove (32) forms a first corner (324) on each of the two sides of the opening, wherein the first corners (324) are located on one side of the second faces (322), wherein the second surface (322) is located between the first surface (321) and the first corner (324), and wherein the arc groove (32) and the two first corners (324) form a U-shape; a switching arrangement (40) rotatably mounted in the third receiving space (13), wherein the switching arrangement (40) is rotatable to control the displacement of the pawl (30) to the left and right in the second receiving space (12) and thus to control the forward and backward rotation of the ratchet wrench structure, wherein the switching arrangement (40) includes a switch (41), a pressure element (42) and an elastic element (43), wherein the switch (41) has a cylindrical block (411), wherein the cylindrical block (411) is deflected in the third receiving space (13), wherein one end of the cylindrical block (411) is exposed in the recess (14), wherein the cylindrical block (411) has a rotary knob, wherein the rotary knob is located close to the first contact surface (141), wherein after rotation of the switch (41) the rotary knob is located close to the second contact surface (142), wherein the cylindrical block (411) is provided with a receiving groove (412) the opening of which is aligned with the arc groove (32), wherein the receiving groove (412) has a rectangular shape, wherein the two sides of the cylindrical block (411) each form a second contact section (413) which serves to make contact with the first contact section (323) and the first corner (324), wherein a limiting groove (414) is provided on the base of the switch (41), wherein a third surface (415) is formed in the limiting groove (414) which is closer to the first receiving space (11) than the axis of the switch (41), wherein the third surface (415) has a planar shape or a convex arc shape, wherein a second hinge part (416) is provided at the other end of the cylindrical block (411) which is hinged to the first hinge part (131), wherein, when one side of the locking pawl (30) rests against the inner wall of the second receiving chamber (12), the first contact section (323) on the other side of the locking pawl (30) limits the second contact section (413), wherein the changeover switch (41) is limited by the first contact section (323) so that it is hinged in the third receiving chamber (13) and does not detach from the main body (10), wherein the pressure element (42) adapts to the shape of the receiving groove (412), wherein the pressure element (42) has the shape of an elongated body, wherein the pressure element (42) is received in the receiving groove (412), wherein the pressure element (42) is provided on one side with a pressure surface (421), wherein the pressure surface (421) presses against the arc groove (32), wherein the switch (41) can be rotated to control the pressure element (42) and the pawl (30), whereby the pressure surface (421) bears against one of the second surfaces (322), so that the pawl is moved left and right in the second receiving space (12), wherein the pressure surface (421) is a single arc surface and has an outer diameter, wherein the outer diameter of the pressure surface (421) corresponds to the inner diameter of the second surface (322), wherein, when the pressure surface (421) bears against the second surface (322), the printing element (42) is limited by the first corner (324) to preventthat it releases from the arc groove (32), wherein the printing element (42) has a receiving recess (422) on the other side, wherein the opening of the receiving recess (422) is aligned with the receiving groove (412), wherein the receiving recess (422) faces away from the printing surface (421) and is concealed in the receiving groove (412), , wherein the elastic element (43) is housed in the receiving groove (412) and the receiving recess (422), wherein the elastic force of the elastic element (43) presses the pressure surface (421) of the pressure element (42) against the arc groove (32); a limiting element (50) that is assembled with the main body (10), the locking pawl (30) and the switch (41), wherein the limiting element (50) is housed in the second receiving space (12), wherein the area of ​​the limiting element (50) corresponds approximately to the area of ​​the second receiving space (12), wherein the limiting element (50) is arranged between the locking pawl (30) and the second contact surface (122), wherein the limiting element (50) is partially received in the limiting groove (414), whereby the limiting element (50) allows the switching arrangement (40) to be rotatably mounted in the third receiving space (13), wherein the limiting element (50) has a concave section (51) which is flush with the third receiving space (13), and wherein the concave section (51) is opposite the switching switch (41), wherein the switch (41) can be rotated within the area of ​​the concave section (51), wherein the limiting element (50) is used to prevent the switch (41) from being rotated excessively within the third receiving space (13), wherein the two second contact sections (413) limit the maximum rotation angle of the switch (41) within the area of ​​the concave section (51), wherein the printing element (42) partially protrudes into the second receiving space (12), wherein the first contact surface (121) limits the pressure element (42), wherein the pressure element (42) is partially received in the receiving groove (412), wherein the limiting element (50) is partially received in the limiting groove (414), such that the switch (41) is rotatably arranged in the third receiving space (13); and a first ring (60) which is received in the first ring groove (15) and the second ring groove (23), whereby the ratchet wheel (20) is rotatably received in the first receiving space (11).

Description

Technical field

[0001] The invention relates to a ratchet wrench structure in which the limiting element is partially received in the limiting groove, wherein the switching arrangement is rotatably mounted in the third receiving groove by means of the limiting element. The switching arrangement is limited at every angle by the limiting element. State of the art

[0002] The inventor's previously filed patent application was not certified due to structural changes at the time of approval. Taiwanese patent application number: 109110124, publication number: 202135993, title: Ratchet wrench structure. The US patent application was approved and certified, US deed number 11370089.

[0003] The disadvantages of this ratchet wrench structure are as follows: 1. When the switch 41 rotates, the positions, arcs, and angles between the concave section 33, the boundary surface 34, and the projection 414 must be precisely calculated so that the projection 414 smoothly engages with or disengages from the boundary surface 34. Matching the boundary surface 34 to the projection 414 is relatively complex and time-consuming. If there is an error between the switch 41 and the pawl 30, there is a possibility of an error in meeting certain specifications. 2. When the rotary knob of the switch 41 approaches the first contact surface 141 or the second contact surface 142, the projection 414 leaves the boundary surface 34. If the projection 414 re-enters the area of ​​the boundary surface 34, a small error during machining will cause a collision between the projection 414 and the arc groove 32. The limiting effect between the switching arrangement 40 and the locking pawl 30 is less reliable. Object of the invention

[0004] The problem to be solved by the invention is as follows: When the switch rotates, the positions, arcs, and angles between the concave section, the boundary surface, and the projection must be precisely calculated so that the projection smoothly rests against or disengages from the boundary surface. In the ratchet wrench structure of the invention, the limiting element is partially received in the limiting groove. By limiting the movement of the switching element, the switching assembly is rotatably mounted in the third receiving space. The switching assembly is restricted at every angle by the limiting element. The switch can be rotated within the area of ​​the concave section. The limiting element is used to prevent the switching assembly from being rotated excessively within the third receiving space. The two secondary contact sections limit the maximum rotation angle of the switching assembly within the area of ​​the concave section.

[0005] The technical solution to the problem is as follows: A ratchet wrench structure comprising: a main body having a first receiving chamber, a second receiving chamber, a first contact surface, a second contact surface, and a third receiving chamber; a ratchet wheel having an annular tooth section; a pawl having a tooth segment, an arc groove, first contact sections, and first corners; a switching arrangement comprising a switch, a pressure element, and an elastic element, wherein the switch has a cylindrical block, a receiving groove, second contact sections, a limiting groove, and a third surface, wherein, when one side of the pawl rests against the inner wall of the second receiving chamber, the first contact section of the other side of the pawl limits the second contact section, and wherein the pressure element has a pressure surface;and a boundary element that is partially incorporated into the boundary groove and has a concave section.;

[0006] The advantages compared to the prior art are as follows: The limiting element is partially recessed in the limiting groove. Due to the limiting element's restriction, the switching assembly is rotatably mounted in the third receiving space. The switching assembly is restricted at every angle by the limiting element. The switch can be rotated within the area of ​​the concave section. The limiting element is used to prevent the switch from being rotated excessively within the third receiving space. The two secondary contact sections limit the maximum rotation angle of the switch within the area of ​​the concave section. Brief description of the drawings Fig. 1 an exploded view of the ratchet wrench structure of the invention, Fig. 2 a front view of the main body of the ratchet wrench structure of the invention, Fig. 3 a perspective view of the locking line of the ratchet key structure of the invention, Fig. 4 a top view of the locking blade of the ratchet wrench structure of the invention, Fig. 5 a perspective view of the switch of the ratchet wrench structure of the invention, Fig. 6 a perspective view of the pressure element of the ratchet wrench structure of the invention, Fig. 7 a perspective view of the ratchet key structure of the invention, Fig. 8 a top view of the ratchet wrench structure of the invention, Fig. 9 a sectional view along line AA according to Fig. 8, Fig. 10 a side view of the ratchet wrench structure of the invention, Fig. 11 a sectional view along line BB according to Fig. 10, Fig. 12 a perspective view of part of the ratchet key structure of the invention, Fig. 13 a perspective view of another operating state of a part of the ratchet wrench structure of the invention, Fig. 14 a sectional view of the other operating state along line BB according to Fig. 10. Ways to implement the invention

[0007] First, the invention is described with reference to Fig. 1 to 6 described. Fig. Figure 1 shows an exploded view of the ratchet wrench structure of the invention, Fig. Figure 2 shows a front view of the main body 10 of the ratchet wrench structure of the invention, Fig. Figure 3 shows a perspective view of the locking curve 30 of the ratchet wrench structure of the invention, Fig. Figure 4 shows a top view of the locking line 30 of the ratchet wrench structure of the invention, Fig. Figure 5 shows a perspective view of the switch 41 of the ratchet wrench structure of the invention, and Fig. Figure 6 shows a perspective view of the pressure element 42 of the ratchet wrench structure of the invention. The invention relates to a ratchet wrench structure comprising: a main body 10, which, as in Fig. Figure 2 shows a first receiving chamber 11 that is circular throughout, wherein the first receiving chamber 11 is provided on one side near the handle with a second receiving chamber 12, wherein the diameter of the second receiving chamber 12 is smaller than the diameter of the first receiving chamber 11, wherein the center of the second receiving chamber 12 is located within the area of ​​the first receiving chamber 11, wherein the second receiving chamber 12 is connected to the first receiving chamber 11, wherein the two ends of the second receiving chamber 12 are closed, wherein the top of the second receiving chamber 12 is provided with a first contact surface 121 and the bottom of the second receiving chamber 12 with a second contact surface 122, wherein the second receiving chamber 12 is provided on one side near the handle with a third receiving chamber 13, wherein the third receiving chamber 13 is connected to the second receiving chamber 12.wherein the top of the third receiving chamber 13 is open, wherein the depth of the third receiving chamber 13 is greater than the depth of the second receiving chamber 12, wherein a first hinge part 131 is provided at the bottom of the third receiving chamber 13, wherein a first circle 132 is formed with the center of the third receiving chamber 13 as the center of the circle, wherein the third receiving chamber 13 is provided with a recess 14 near the handle, wherein the recess 14 is connected to the third receiving chamber 13, wherein the opening of the third receiving chamber 13 is located in the region of the recess 14, wherein a first contact surface 141 and a second contact surface 142 are formed on the left and right sides of the recess 14, wherein the first contact surface 141 and the second contact surface 142 are not tangential to the first circle 132, wherein the first contact surface 141 and the second contact surface 142 are both planar, wherein between the first circle 132,a first angle 143 is formed between the first mounting surface 141 and the second mounting surface 142, wherein the first angle 143 is between 60 degrees and 100 degrees or between 70 degrees and 90 degrees, wherein a first annular groove 15 is formed near the opening of one end of the first receiving space 11, wherein the first annular groove 15 has a circular shape, wherein the main body 10 has a first end surface 16 on its upper side, and wherein the first end surface 16 is flat; a ratchet wheel 20 rotatably mounted in the first receiving space 11, wherein the ratchet wheel 20 has an annular tooth section 21 on its outer circumference, wherein the ratchet wheel 20 forms a drive section 22 which is a polygonal hole and serves to be inserted into a screw element 14, wherein the ratchet wheel 20 is provided with a second annular groove 23 which is aligned with the first annular groove 15, and wherein the second annular groove 23 has a circular ring shape; a locking pawl 30, which, as in the Fig. 3 and Fig. 4 shown, is arranged on one side of the second receiving space 12, wherein the pawl 30 is controlled such that it is displaced to the left and right in the second receiving space 12, wherein one end of the pawl 30 is in contact with the first contact surface 121, wherein the front of the pawl 30 forms a tooth segment 31, wherein the tooth segment 31 engages in the tooth section 21, wherein the center of the rear of the pawl 30 is provided with an arc groove 32, wherein the arc groove 32 has a first surface 321 and two second surfaces 322, wherein the first surface 321 is located in the center of the arc groove 32, is a concave arc surface, has the shape of a single arc surface and an inner diameter, wherein the two second surfaces 322 are located on two sides of the arc groove 32, are symmetrical to the first surface 321 and have the shape of a concave arc surface, wherein the two second surfaces 322 form two most concave points of the arc grooves 32,wherein the second surfaces 322 have the shape of a single arc surface and an inner diameter, wherein the inner diameter of the second surfaces 322 is smaller than the inner diameter of the first surface 321, wherein the second surfaces 322 are tangential to the first surface 321, wherein the two sides of the rear of the pawl 30 each form a first contact section 323, wherein the arc groove 32 lies between the two first contact sections 323, wherein the two first contact sections 323 are symmetrical to the arc groove 32, wherein the arc groove 32 forms a first corner 324 on each of the two sides of the opening, wherein the first corners 324 are located on one side of the second surfaces 322, wherein the second surface 322 is located between the first surface 321 and the first corner 324, and wherein the arc groove 32 and the two first corners 324 form a U-shape; a switching arrangement 40 rotatably mounted in the third receiving space 13, wherein the switching arrangement 40 is rotatable to control the displacement of the pawl 30 to the left and right in the second receiving space 12 and thus to control the forward and backward rotation of the ratchet wrench structure, wherein the switching arrangement 40 includes a switch 41, a pressure element 42 and an elastic element 43, where, as in Fig. Figure 5 shows the switch 41 having a cylindrical block 411, wherein the cylindrical block 411 is deflected in the third receiving space 13, with one end of the cylindrical block 411 being exposed in the recess 14, wherein the cylindrical block 411 has a rotary knob, the rotary knob being located close to the first contact surface 141, wherein after rotation of the switch 41 the rotary knob is located close to the second contact surface 142, wherein the end surface of the cylindrical block 411 is flush with the first end surface 16, wherein the cylindrical block 411 is provided with a receiving groove 412, the opening of which is aligned with the arc groove 32, wherein the receiving groove 412 has a rectangular shape, wherein the two sides of the cylindrical block 411 each form a second contact section 413, which serves to make contact with the first contact section 323 and the first corner 324, wherein on the bottom of the switch 41 a limiting groove 414 is provided,wherein a third surface 415 is formed in the limiting groove 414, which is closer to the first receiving space 11 than the axis of the switch 41, wherein the third surface 415 has a planar shape or a convex arc shape, wherein a second hinge part 416 is provided at the other end of the cylindrical block 411, which is hingedly connected to the first hinge part 131, where, as in Fig. 11 shows that when one side of the locking pawl 30 rests against the inner wall of the second receiving chamber 12, the first contact section 323 on the other side of the locking pawl 30 limits the second contact section 413, wherein the changeover switch 41 is limited by the first contact section 323 so that it is hinged in the third receiving chamber 13 and does not detach from the main body 10, wherein one side of the pawl 30 rests against the inner wall of the second receiving chamber 12, wherein a small gap is formed between the second contact section 413 and the first corner 324 on the other side of the pawl 30, wherein when the main body 10 is rotated, the main body 10 deforms, causing the second contact section 413 to come into contact with the first corner 324, that is, when the main body 10 is rotated, the switch 41 has the function of supporting the other side of the pawl 30, wherein both sides of the pawl 30 are supported by the second receiving chamber 12 and the switch 41, so that the engagement of the tooth segment 31 with the ratchet wheel 21 becomes more stable, wherein, when the pawl 30 and the switching arrangement 40 are mounted in the main body 10 and the main body 10 is not yet rotated, there is a small gap between the second contact section 413 and the first corner 324, which means that the second contact section 413 does not touch the first corner 324, wherein, if the drive section 22 has a size of 19 mm, this gap is not greater than 1 mm; when the main body 10 is rotated, it deforms slightly, wherein some torque wrenches measure the torque using a voltage gauge attached to the main body 10, wherein this voltage gauge touches the main body 10, and wherein, when the main body 10 deforms, the voltage gauge measures the deformation and thus determines the torque;When the main body 10 is deformed by rotation, the first receiving chamber 11, the second receiving chamber 12 and the third receiving chamber 13 are also slightly deformed, with the second contact section 413 coming into contact with the first corner 324 after the deformation of the main body 10; this is the situation described in paragraph 0026; when the main body 10 is deformed by rotation, the ratchet wheel 20, the pawl 30 and the switch 41 are all subjected to a force and are also deformed by the force; Alternatively, another principle is that when one side of the pawl 30 rests against the inner wall of the second receiving chamber 12, the second contact section 413 is already in contact with the first corner 324 on the other side of the pawl 30, with the two sides of the pawl 30 being supported by the second receiving chamber 12 and the switch 41, so that the engagement of the tooth segment 31 with the ratchet wheel 21 becomes more stable; where, as in Fig. Figure 6 shows that the pressure element 42 fits the shape of the receiving groove 412, wherein the pressure element 42 has the shape of an elongated body, wherein the pressure element 42 is received in the receiving groove 412, wherein the pressure element 42 is provided on one side with a pressure surface 421, wherein the pressure surface 421 presses against the arc groove 32, wherein the switch 41 can be rotated to control the pressure element 42 and the pawl 30, whereby the pressure surface 421 bears against one of the second surfaces 322, so that the pawl is moved left and right in the second receiving space 12, wherein the pressure surface 421 is a single arc surface and has an outer diameter, wherein the outer diameter of the pressure surface 421 corresponds to the inner diameter of the second surface 322, wherein, when the pressure surface 421 bears against the second surface 322, the pressure element 42 is bounded by the first corner 324. to prevent it from coming loose from the bow groove 32,wherein the printing element 42 has a receiving recess 422 on the other side, wherein the opening of the receiving recess 422 is aligned with the receiving groove 412, wherein the receiving recess 422 is facing away from the printing surface 421 and is concealed in the receiving groove 412, wherein the elastic element 43 is housed in the receiving groove 412 and the receiving recess 422, wherein the elastic force of the elastic element 43 presses the pressure surface 421 of the pressure element 42 against the arc groove 32, wherein the elastic element 43 is a spring; a limiting element 50, which is assembled with the main body 10, the pawl 30 and the switch 41, wherein the limiting element 50 is housed in the second receiving space 12, wherein the area of ​​the limiting element 50 corresponds approximately to the area of ​​the second receiving space 12, wherein the limiting element 50 is arranged between the pawl 30 and the second contact surface 122, wherein the limiting element 50 is partially received in the limiting groove 414, whereby the switching arrangement 40 is rotatably mounted in the third receiving space 13 by means of the limiting element 50, wherein the limiting element 50 has a concave section 51 which is flush with the third receiving space 13, and wherein the concave section 51 is opposite the switch 41, wherein the switch 41 can be rotated within the area of ​​the concave section 51, wherein the limiting element 50 is used to prevent the switch 41 from being rotated excessively within the third receiving space 13, wherein the two second contact sections 413 limit the maximum rotation angle of the switch 41 within the area of ​​the concave section 51, wherein the pressure element 42 partially projects into the second receiving chamber 12, wherein the first contact surface 121 limits the pressure element 42, wherein the pressure element 42 is partially received in the receiving groove 412, wherein the limiting element 50 is partially received in the limiting groove 414, so that the switch 41 is rotatably arranged in the third receiving chamber 13; and a first ring 60 which is received in the first ring groove 15 and the second ring groove 23, whereby the ratchet wheel 20 is rotatably received in the first receiving space 11, and wherein the first ring 60 is C-shaped.

[0008] Furthermore, it will be noted that Fig. Reference is made to 7 to 9. Fig. Figure 7 shows a perspective view of the ratchet wrench structure of the invention, Fig. Figure 8 shows a top view of the ratchet wrench structure of the invention, and Fig. Figure 9 shows a cross-sectional view along line AA according to Fig. 8. It is clearly evident from the figures that the ratchet wheel 20 is rotatably arranged in the first receiving chamber 11, the pawl 30 is arranged in the second receiving chamber 12, and the switching assembly 40 is rotatably arranged at the location of the third receiving chamber 13, the first joint part 131, and the recess 14. The switching assembly 40 can be rotated to move the pawl 30 to the left and right in the second receiving chamber 12, thus achieving bidirectional rotation. The limiting element 50 is received in the second receiving chamber 12. The first ring 60 is housed in the first annular groove 15 and the second annular groove 23.

[0009] Furthermore, it will be noted that Fig. Reference is made to 10 to 12. Fig. Figure 10 shows a side view of the ratchet wrench structure of the invention, Fig. Figure 11 shows a cross-sectional view along line BB according to Fig. 10, and Fig. Figure 12 shows a perspective view of part of the ratchet wrench structure of the invention. As can be clearly seen from the figures, the pawl 30 is received on one side in the second receiving chamber 12. One side of the pawl 30 rests against the inner wall of the second receiving chamber 12. The switching arrangement 40 is rotatably arranged in the third receiving chamber 13. The second contact section 413 is in contact with one of the first contact sections 323. The limiting element 50 is partially received in the limiting groove 414. The second contact section 413 can limit the maximum rotation angle of the switching switch 41 within the area of ​​the concave section 51. The pressure element 42 presses against one of the second surfaces 322 through the elastic force of the elastic element 43 with the pressure surface 421. When the switch 41 is rotated, the switching arrangement 40 can move the locking pawl 30 in the second receiving chamber 12 to the left or right.

[0010] Furthermore, it will be noted that Fig. 13 and Fig. 14 Referenced. Fig. Figure 13 shows a perspective view of another operating state of a part of the ratchet wrench structure of the invention, and Fig. Figure 14 shows a cross-sectional view of the other operating state along line BB according to Fig. 10. The switching assembly 40 is rotated so that the locking pawl 30 is located in the center of the second receiving chamber 12. The limiting element 50 is partially received in the limiting groove 414. The switching switch 41 is restricted by the limiting element 50.

[0011] In a further embodiment of the present invention, the drive section 22 is not formed by a polygonal hole but by a square projection. The drive section 22 can be attached to various hand tools with a square recess and rotated.

[0012] The advantages of the ratchet wrench structure of this invention are as follows: 1. The limiting element 50 is partially housed in the limiting groove 414. Due to the limitation of the limiting element 50, the switching arrangement 40 is rotatably mounted in the third receiving space 13, that is, the switching arrangement 40 is limited at every angle by the limiting element 50 and is rotatably mounted in the third receiving space 13. 2. The switch 41 can be rotated within the area of ​​the concave section 51. The limiting element 50 is used to prevent the switch 41 from being rotated excessively within the third receiving space 13. The two second contact sections 413 limit the maximum rotation angle of the switch 41 within the area of ​​the concave section 51. 3. The third surface 415 is closer to the first receiving space 11 than the axis of the switch 41, so that the switch 41 can have a larger volume, giving the invention better structural strength and increased ease of use. 4. One side of the locking latch 30 rests against the inner wall of the second recording chamber 12. The switch 41 serves to support the other side of the locking latch 30. Both sides of the locking latch 30 are supported by the second recording chamber 12 and the switch 41. 5. As in Fig. 11 and Fig. As shown in Figure 12, the pressure element 42, through the elastic force of the elastic element 43, presses its pressure surface 421 against the second surface 322. The inner diameter of the second surface 322 is equal to or close to the outer diameter of the pressure surface 421. The pressure surface 421 rests against the second surface 322. When the switch 41 is turned, the pressure element 42 automatically moves onto the second surface 322, thus achieving automatic positioning. 6. The printing element 42 is limited by the first corners 324 to prevent it from detaching from the sheet groove 32. The first two corners 324 can limit the maximum rotation of the printing element 42. 7. As in Fig. As shown in Figure 12, the pressure element 42 is rectangular. A larger contact area exists between the pressure surface 421 and the second surface 322. Furthermore, the contact surfaces of the pressure surface 421 and the second surface 322 extend in the vertical direction of the pawl 30, resulting in improved pressure between the pressure element 42 and the pawl 30. 8. The pressure element 42 is U-shaped and has only one receiving recess 422. The pressure element 42 has a larger volume and better structural strength to prevent damage from collisions. 9. As in Fig. Figure 12 shows that when one side of the locking pawl 30 rests against the inner wall of the second receiving chamber 12, the first contact surface 121 limits the pressure element 42. The pressure element 42 limits the changeover switch 4. The first contact section 323 limits the second contact section 413. The limiting element 50 is partially received in the limiting groove 414, meaning that the changeover switch 41 is simultaneously limited by three components, namely the main body 10, the locking pawl 30, and the limiting element 50, and is difficult to remove from the third receiving chamber 13. 10. As in Fig.As shown in Figure 13, when the switch 41 is rotated to the center position, the locking pawl 30 is located in the center of the second receiving chamber 12. The first contact surface 121 limits the pressure element 42. The pressure element 42 limits the switch 41. The limiting element 50 is partially received in the limiting groove 414. The switch 41 is simultaneously limited by the first contact surface 121 and the limiting element 50. The switch 41 is rotatably arranged in the third receiving chamber 13. 11. In points 9 and 10, the switch 41 has several limitations. The switch 41 is rotatably mounted in the third recording chamber 13, which makes the articulated connection between the switch 41 and the third recording chamber 13 more reliable. 12. The switching arrangement 40 is rotatably mounted in the third receiving chamber 13. The rotary knob at one end of the cylindrical block 411 protrudes from the recess 14. The rotary knob is located near the first contact surface 141. After the switch 41 has been rotated, the rotary knob is located near the second contact surface 142, meaning that the rotation of the switch 41 is limited to a maximum extent. 13. The second joint part 416 is articulated with the first joint part 131. The underside of the switch 41 also has an articulated structure. The articulated structure between the switch 41 and the third receiving chamber 13 is more reliable. 14. The end face of the cylindrical block 411 of the switch 41 is flush with the first end face 16. One end of the cylindrical block 411 is received in the recess 14 to prevent the ratchet wrench structure from accidentally striking the switch 41 when rotating, thus preventing the ratchet wrench structure from automatically switching between forward and reverse rotation. Reference symbol list 10 main bodies 11 first recording room 12 second recording room 121 first contact surface 122 second contact surface 13 third recording room 131 first joint part 132 first circle 14 Exclusion 141 first investment area 142 second planting area 143 first angle 15 first ring groove 16 first end surface 20 ratchet wheel 21 tooth section 22 Drive section 23 second ring groove 30 locking latch 31 first area 32 Bow groove 321 first area 322 second area 323 first contact section 324 first corner 40 switching arrangement 41 switches 411 cylindrical block 412 recordings 413 second contact section 414 Limit groove 415 third area 416 second joint part 42 Pressure element 421 Print area 422 Recording Jump 43 elastic element 50 boundary element 51 concave section 60 first ring QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 11370089

[0002]

Claims

[1] Ratchet key structure, which includes: a main body (10) having a first receiving chamber (11) which is circular throughout, wherein the first receiving chamber (11) is provided on one side near the handle with a second receiving chamber (12), wherein the diameter of the second receiving chamber (12) is smaller than the diameter of the first receiving chamber (11), wherein the center of the second receiving chamber (12) is located within the area of ​​the first receiving chamber (11), wherein the second receiving chamber (12) is connected to the first receiving chamber (11), wherein the two ends of the second receiving chamber (12) are closed, wherein the top of the second receiving chamber (12) is provided with a first contact surface (121) and the bottom of the second receiving chamber (12) with a second contact surface (122), wherein the second receiving chamber (12) is provided on one side near the handle with a third receiving chamber (13), wherein the third recording room (13) is connected to the second recording room (12), wherein the top of the third receiving chamber (13) is open, wherein the depth of the third receiving chamber (13) is greater than the depth of the second receiving chamber (12), wherein a first hinge part (131) is provided at the bottom of the third receiving chamber (13), wherein a first circle (132) is formed with the center of the third receiving chamber (13) as the center of the circle, wherein the third receiving chamber (13) is provided with a recess (14) near the handle, wherein the recess (14) is connected to the third receiving chamber (13), wherein the opening of the third receiving chamber (13) is located in the region of the recess (14), wherein a first contact surface (141) and a second contact surface (142) are formed on the left and right sides of the recess (14), wherein a first annular groove (15) is formed near the opening of one end of the first receiving chamber (11), wherein the first annular groove (15) has a circular shape,and wherein the main body (10) has a first end surface (16) on its upper side; a ratchet wheel (20) rotatably mounted in the first receiving space (11), wherein the ratchet wheel (20) has an annular tooth section (21) on its outer circumference, wherein the ratchet wheel (20) is provided with a second annular groove (23) which is aligned with the first annular groove (15), and wherein the second annular groove (23) has a circular ring shape; A pawl (30) is arranged on one side of the second receiving space (12), the pawl (30) being controlled to be displaced left and right in the second receiving space (12), one end of the pawl (30) being in contact with the first contact surface (121), the front of the pawl (30) forming a tooth segment (31), the tooth segment (31) engaging in the tooth section (21), the center of the rear of the pawl (30) being provided with an arc groove (32), the arc groove (32) having a first surface (321) and two second surfaces (322), the first surface (321) being located in the center of the arc groove (32), being a concave arc surface, having the shape of a single arc surface and an inner diameter, the two second surfaces (322) being located on two sides of the arc groove (32), symmetrically to the first surface (321) are and have the shape of a concave arc surface,wherein the second surfaces (322) have the shape of a single arc surface and an inner diameter, wherein the inner diameter of the second surfaces (322) is smaller than the inner diameter of the first surface (321), wherein the second surfaces (322) are tangential to the first surface (321), wherein the two sides of the back of the pawl (30) each form a first contact section (323), wherein the arc groove (32) lies between the two first contact sections (323), wherein the two first contact sections (323) are symmetrical to the arc groove (32), wherein the arc groove (32) forms a first corner (324) on each of the two sides of the opening, where the first corners (324) are located on one side of the second faces (322), wherein the second surface (322) is located between the first surface (321) and the first corner (324), and wherein the arc groove (32) and the two first corners (324) form a U-shape; a switching arrangement (40) rotatably mounted in the third receiving space (13), wherein the switching arrangement (40) is rotatable to control the displacement of the pawl (30) to the left and right in the second receiving space (12) and thus to control the forward and backward rotation of the ratchet wrench structure, wherein the switching arrangement (40) includes a switch (41), a pressure element (42) and an elastic element (43), wherein the switch (41) has a cylindrical block (411), wherein the cylindrical block (411) is deflected in the third receiving space (13), wherein one end of the cylindrical block (411) is exposed in the recess (14), wherein the cylindrical block (411) has a rotary knob, wherein the rotary knob is located close to the first contact surface (141), wherein after rotation of the switch (41) the rotary knob is located close to the second contact surface (142), wherein the cylindrical block (411) is provided with a receiving groove (412) the opening of which is aligned with the arc groove (32), wherein the receiving groove (412) has a rectangular shape, wherein the two sides of the cylindrical block (411) each form a second contact section (413) which serves to make contact with the first contact section (323) and the first corner (324), wherein a limiting groove (414) is provided on the base of the switch (41), wherein a third surface (415) is formed in the limiting groove (414) which is closer to the first receiving space (11) than the axis of the switch (41), wherein the third surface (415) has a planar shape or a convex arc shape, wherein a second hinge part (416) is provided at the other end of the cylindrical block (411) which is hinged to the first hinge part (131), wherein, when one side of the locking pawl (30) rests against the inner wall of the second receiving chamber (12), the first contact section (323) on the other side of the locking pawl (30) limits the second contact section (413), wherein the changeover switch (41) is limited by the first contact section (323) so that it is hinged in the third receiving chamber (13) and does not detach from the main body (10), wherein the pressure element (42) adapts to the shape of the receiving groove (412), wherein the pressure element (42) has the shape of an elongated body, wherein the pressure element (42) is received in the receiving groove (412), wherein the pressure element (42) is provided on one side with a pressure surface (421), wherein the pressure surface (421) presses against the arc groove (32), wherein the switch (41) can be rotated to control the pressure element (42) and the pawl (30), whereby the pressure surface (421) bears against one of the second surfaces (322), so that the pawl is moved left and right in the second receiving space (12), wherein the pressure surface (421) is a single arc surface and has an outer diameter, wherein the outer diameter of the pressure surface (421) corresponds to the inner diameter of the second surface (322), wherein, when the pressure surface (421) bears against the second surface (322), the printing element (42) is limited by the first corner (324) to preventthat it releases from the arc groove (32), wherein the printing element (42) has a receiving recess (422) on the other side, wherein the opening of the receiving recess (422) is aligned with the receiving groove (412), wherein the receiving recess (422) is facing away from the printing surface (421) and is concealed in the receiving groove (412), wherein the elastic element (43) is housed in the receiving groove (412) and the receiving recess (422), wherein the elastic force of the elastic element (43) presses the pressure surface (421) of the pressure element (42) against the arc groove (32); a limiting element (50) that is assembled with the main body (10), the locking pawl (30) and the switch (41), wherein the limiting element (50) is housed in the second receiving space (12), wherein the area of ​​the limiting element (50) corresponds approximately to the area of ​​the second receiving space (12), wherein the limiting element (50) is arranged between the locking pawl (30) and the second contact surface (122), wherein the limiting element (50) is partially received in the limiting groove (414), whereby the limiting element (50) allows the switching arrangement (40) to be rotatably mounted in the third receiving space (13), wherein the limiting element (50) has a concave section (51) which is flush with the third receiving space (13), and wherein the concave section (51) is opposite the switching switch (41), wherein the switch (41) can be rotated within the area of ​​the concave section (51), wherein the limiting element (50) is used to prevent the switch (41) from being rotated excessively within the third receiving space (13), wherein the two second contact sections (413) limit the maximum rotation angle of the switch (41) within the area of ​​the concave section (51), wherein the printing element (42) partially protrudes into the second receiving space (12), wherein the first contact surface (121) limits the pressure element (42), wherein the pressure element (42) is partially received in the receiving groove (412), wherein the limiting element (50) is partially received in the limiting groove (414), such that the switch (41) is rotatably arranged in the third receiving space (13); and a first ring (60) which is received in the first ring groove (15) and the second ring groove (23), whereby the ratchet wheel (20) is rotatably received in the first receiving space (11). [2] Ratchet key structure according to claim 1, characterized by, that the first support surface (141) and the second support surface (142) are not tangential to the first circle (132), wherein the first support surface (141) and the second support surface (142) are both planar, wherein a first angle (143) is formed between the first circle (132), the first support surface (141) and the second support surface (142), and wherein the first angle (143) is between 60 degrees and 100 degrees or between 70 degrees and 90 degrees. [3] Ratchet key structure according to claim 1, characterized by , that the first end surface (16) is flat, the ratchet wheel (20) forms a drive section (22), that is a polygonal hole and serves to be inserted into a screw element (14), or the drive section (22) is a square projection, and the first ring (60) is C-shaped. [4] Ratchet key structure according to claim 1, characterized by , that the end face of the cylindrical block (411) is flush with the first end face (16). [5] Ratchet key structure according to claim 1, characterized by , that one side of the pawl (30) rests against the inner wall of the second receiving chamber (12), with a small gap being formed between the second contact section (413) and the first corner (324) on the other side of the pawl (30), wherein when the main body (10) is rotated, the main body (10) deforms, causing the second contact section (413) to be in contact with the first corner (324), that is, when the main body (10) is rotated, the switch (41) has the function of supporting the other side of the pawl (30), wherein both sides of the pawl (30) are supported by the second receiving chamber (12) and the switch (41), so that the engagement of the tooth segment (31) with the ratchet wheel (21) becomes more stable. [6] Ratchet key structure according to claim 1, characterized by, that when one side of the pawl (30) rests against the inner wall of the second receiving chamber (12), the second contact section (413) is already in contact with the first corner (324) on the other side of the pawl (30), with the two sides of the pawl (30) being supported by the second receiving chamber (12) and the switch (41), so that the engagement of the tooth segment (31) with the ratchet wheel (21) becomes more stable. [7] Ratchet key structure according to claim 1, characterized by , that the elastic element (43) is a spring.

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