Blocking tooth structure

Abstract

The utility model provides a retaining tooth structure. The retaining tooth structure comprises a body, two tooth parts and two concave spaces, the body comprises an inner edge surface and an outer edge surface, and the inner edge surface and the outer edge surface are oppositely arranged. The two tooth parts are arranged at the two ends of the inner edge face. The two concave spaces are arranged on the body and correspond to the positions of the two tooth parts respectively. Therefore, the problem that the retaining tooth structure is easy to damage due to pressure is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tooth blocking structure, in particular to a tooth blocking structure applied to a ratchet wrench. BACKGROUND

[0002] In the use process of the ratchet wrench, when the force is too large, it may exceed the pressure range that the tooth blocking can bear and cause the tooth blocking to deform or be damaged, thereby making the tooth blocking unable to engage with the ratchet, which will greatly affect the service life of the ratchet wrench.

[0003] Therefore, it is an important issue for the related practitioners to design a tooth blocking structure that can avoid damage caused by excessive force. SUMMARY

[0004] An embodiment of the utility model provides a tooth blocking structure which comprises a body, two tooth parts and two inner recess spaces. The body comprises an inner edge surface and an outer edge surface, wherein the inner edge surface and the outer edge surface are oppositely arranged. The two tooth parts are arranged at two ends of the inner edge surface. The two inner recess spaces are arranged in the body and correspond to the positions of the two tooth parts respectively.

[0005] Further, a reference line is defined from the two tooth parts to the outer edge surface respectively, the two inner recess spaces have an inner recess space thickness along the reference line respectively, and the two tooth parts and the two inner recess spaces have a tooth wall thickness along the reference line respectively;

[0006] The inner recess space thickness is greater than the tooth wall thickness.

[0007] Further, the two inner recess spaces and the outer edge surface have a wall thickness along the reference line respectively;

[0008] The inner recess space thickness is greater than the wall thickness.

[0009] Further, the body comprises two side surfaces which are connected between the inner edge surface and the outer edge surface.

[0010] The two inner recess spaces are arranged in one of the side surfaces and extend from the one side surface to the other side surface.

[0011] Further, the two inner recess spaces are grooves or through holes.

[0012] Further, the shapes of the two inner recess spaces are circular or drop-shaped.

[0013] Further, the inner edge surface is a concave arc surface.

[0014] Further, the outer edge surface is a plane or a convex arc surface.

[0015] Further, the two inner recessed spaces are defined by the outer edge surface and extend from the outer edge surface toward the inner edge surface.

[0016] Further, a reference line is defined from each of the two tooth portions toward the outer edge surface, and a center of each of the inner recessed spaces is not aligned with the reference line.

[0017] Each of the inner recessed spaces has an inner recessed space thickness along the reference line between the inner recessed space and the outer edge surface, and each of the two tooth portions has a tooth wall thickness along the reference line between the tooth portion and the inner recessed space.

[0018] The inner recessed space thickness is greater than the tooth wall thickness.

[0019] Another embodiment of the present application provides a tooth blocking structure, which includes a body, two tooth portions, and four recessed grooves. The body includes an inner edge surface, an outer edge surface, and two side surfaces. The inner edge surface and the outer edge surface are oppositely arranged, and the two side surfaces are oppositely arranged and connected between the inner edge surface and the outer edge surface. The two tooth portions are arranged on the inner edge surface of the body in a separated manner. The four recessed grooves are arranged on the body in a separated manner. Each of the recessed grooves corresponds to one of the two tooth portions. Two of the four recessed grooves are recessed in one of the two side surfaces, and the other two of the four recessed grooves are recessed in the other one of the two side surfaces.

[0020] Further, the inner edge surface is a concave arc surface.

[0021] Further, each of the recessed grooves has a bottom surface, and the bottom surface is a flat surface or a concave arc surface.

[0022] Further, one of the two tooth portions defines a reference line extending toward the outer edge surface. One of the four recessed grooves has a recessed groove width along the reference line. A wall thickness is defined between the one of the four recessed grooves and the outer edge surface along the reference line. The recessed groove width is greater than the wall thickness.

[0023] Further, each of the recessed grooves has a recessed groove depth, which is perpendicular to the reference line. The recessed groove depth accounts for 25% to 35% of a thickness of the body.

[0024] Another embodiment of the present application provides a tooth blocking structure, comprising a body, two tooth portions, and four grooves. The body comprises an inner edge surface, an outer edge surface, and two side surfaces. The inner edge surface and the outer edge surface are oppositely arranged, and the two side surfaces are oppositely arranged and connected between the inner edge surface and the outer edge surface. The two tooth portions are arranged on the inner edge surface of the body separately from each other. The four grooves are arranged on the body separately from each other, wherein each groove corresponds to one of the two tooth portions, two of the four grooves are recessed in one of the two side surfaces, and the other two of the four grooves are recessed in the other one of the two side surfaces. The one of the two tooth portions defines a reference line extending to the outer edge surface. The groove has a groove width along the reference line. The one of the two tooth portions and the groove have a tooth wall thickness along the reference line, and the groove width is greater than the tooth wall thickness.

[0025] Further, the inner edge surface is a concave arc surface.

[0026] Further, the groove and the outer edge surface have a wall thickness along the reference line, and the groove width is greater than the wall thickness.

[0027] Further, each groove has a bottom surface, and the bottom surface is a flat surface or a concave arc surface.

[0028] Further, each groove has a groove depth, the groove depth is perpendicular to the reference line, and the groove depth accounts for 25% to 35% of the thickness of the body. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a perspective view of the tooth blocking structure of the first embodiment of the present application;

[0030] Figure 2 is a front view of the tooth blocking structure of FIG. 1;

[0031] Figure 3 is a front view of the tooth blocking structure of the second embodiment of the present application;

[0032] Figure 4 is a front view of the tooth blocking structure of the third embodiment of the present application;

[0033] Figure 5 is a front view of the tooth blocking structure of the fourth embodiment of the present application;

[0034] Figure 6 is a perspective view of the tooth blocking structure of the fifth embodiment of the present application;

[0035] Figure 7 is a sectional view of the tooth blocking structure of FIG. 6 along the sectional line 7-7;

[0036] Figure 8 is a front view of the tooth blocking structure of FIG. 6;

[0037] Figure 9 is a perspective view of the tooth blocking structure of the sixth embodiment of the present application;

[0038] Figure 10 is a sectional view of the tooth blocking structure of FIG. 9 along the section line 10-10.

[0039] 100, 200, 300, 400, 500, 600: tooth blocking structure

[0040] 110, 210, 310, 410, 510, 610: body

[0041] 111, 211, 311, 411, 511, 611: inner edge surface

[0042] 112, 212, 312, 412, 512, 612: outer edge surface

[0043] 113, 213, 313, 413, 513, 613: side surface

[0044] 120, 220, 320, 420, 520, 620: tooth portion

[0045] 130, 230, 330, 430: inner recessed space

[0046] 530, 630: groove

[0047] 531, 631: bottom surface

[0048] d1, d4: inner recessed space thickness

[0049] d2, d5, d7: tooth wall thickness

[0050] d3, d8: wall thickness

[0051] d6: groove width

[0052] d9: groove depth

[0053] d10: thickness

[0054] L: reference line DETAILED DESCRIPTION

[0055] The embodiments of the present application will be described herein below with reference made to figures. For purposes of explanation, numerous specific details will be set forth in the description below. It should be appreciated that the present application can be practiced in other embodiments that depart from these specific details, and that such embodiments are to be considered an implicit variation of the present application. It should also be noted that for clarity and easy of explanation, the drawings can not necessarily be drawn to scale and that a given element can have different altered configurations in different drawings and that elements can be shown diagrammatically in one or more drawings. In addition, it should be appreciated that the use of certain

[0056] Furthermore, when an element in a claim is connected with an "or", commata or like connective, such clause shall be understood to present alternatives use of one amongst the elements or integers or groups that are discloses. Only terms clearly indicate that an element is consist of multiple options shall be construed as applying all and only the possible options of the element. The use of the term "including" as well as other forms for example "comprising", "having" or "containing" are not to be construed as limiting. The term "consisting of" is to be construed as a total listing, and the term "consisting essentially of" is to be construed as a total listing with the possible addition of one or more non-essential elements or integers. The use of any form in the present application should not be construed as preferred or particularly inventive over the use of other forms. The use of "first", "second", "third", etc. are only to describe different elements and should not be construed as limiting the elements themselves. A first element can also be called a second element. The combination of elements in the present application should not be construed as a combination that is generally known, conventional or known in the art, and the combination of elements should not be construed as being easily completed by one of ordinary skill in the art.

[0057] Please refer to Figure 1 and Figure 2 wherein Figure 1 is a perspective view of the tooth blocking structure 100 of the first embodiment of the present application, Figure 2 is a front view of the tooth blocking structure 100 of the first embodiment. The tooth blocking structure 100 comprises a body 110, two tooth portions 120 and two inner recessed spaces 130, wherein the tooth portions 120 and the inner recessed spaces 130 are disposed on the body 110. In the first embodiment, the tooth blocking structure 100 can be applied to a ratchet wrench and used to engage with a ratchet wheel. The tooth blocking structure 100 can be integrally formed, but the present application is not limited thereto.

[0058] The body 110 comprises an inner edge surface 111, an outer edge surface 112 and two side surfaces 113. The inner edge surface 111 and the outer edge surface 112 are disposed opposite to each other, and the two side surfaces 113 are disposed opposite to each other and connected between the inner edge surface 111 and the outer edge surface 112. The thickness of the two ends of the body 110 is thicker than the thickness of the center of the body 110, and the two tooth portions 120 are disposed at the two ends of the inner edge surface 111. In the first embodiment, the inner edge surface 111 is a concave curved surface, the outer edge surface 112 is a flat surface, and the side surface 113 is a flat surface.

[0059] The two concave spaces 130 are arranged on one side surface 113 of the body 110, and are located at two ends of the body 110 and correspond to the two tooth portions 120 respectively. The two concave spaces 130 extend from one side surface 113 to the other side surface 113, and the concave spaces 130 can be grooves or through holes, but the utility model is not limited thereto. In the first embodiment, the shape of the concave space 130 is approximately in the shape of a water drop which is tapered from the outer edge surface 112 to the inner edge surface 111.

[0060] In Figure 2 the utility model, a reference line L is defined from the tooth portion 120 to the outer edge surface 112, the two concave spaces 130 have a concave space thickness d1 along the reference line L respectively, the two tooth portions 120 and the two concave spaces 130 have a tooth wall thickness d2 along the reference line L respectively, and the two concave spaces 130 and the outer edge surface 112 have a wall thickness d3 along the reference line L respectively. The concave space thickness d1 is greater than the tooth wall thickness d2, and the concave space thickness d1 is greater than the wall thickness d3.

[0061] During the use of the ratchet wrench, the tooth blocking structure 100 can compress a space when a force is applied, so that the problem of damage to the body 110 or the tooth portion 120 caused by excessive force can be avoided, and the durability and service life of the ratchet wrench can be improved.

[0062] It should be particularly pointed out that if the concave space thickness d1 of the concave space 130 is too small or the tooth wall thickness d2 is too large (the position of the concave space 130 is too far from the inner edge surface 111), the effective inward shrinking effect of the body 110 under stress cannot be provided, the tooth blocking structure 100 cannot be protected from damage, and the durability and service life of the tooth blocking structure 100 cannot be improved.

[0063] Please refer to Figure 3 , Figure 3 is a front view of the tooth blocking structure 200 of the second embodiment of the utility model. The tooth blocking structure 200 comprises a body 210, two tooth portions 220 and two concave spaces 230. The main difference between the tooth blocking structure 200 of the second embodiment and the tooth blocking structure 100 of the first embodiment is the shape of the concave space 230. Specifically, the shape of the concave space 230 is circular, and the concave space 230 can be a groove or a through hole.

[0064] The body 210 comprises an inner edge surface 211, an outer edge surface 212 and two side surfaces 213, wherein the connection relationship of the inner edge surface 211, the outer edge surface 212 and the side surface 213 is the same as that of the inner edge surface 111, the outer edge surface 112 and the side surface 113 of the first embodiment, and the tooth portion 220 is the same as the tooth portion 120 of the first embodiment, which will not be described again.

[0065] Please refer to Figure 4 , Figure 4is a front view of the tooth blocking structure 300 of the third embodiment of the present utility model. The tooth blocking structure 300 comprises a body 310, two tooth portions 320 and two inner recessed spaces 330. The main difference between the tooth blocking structure 300 of the third embodiment and the tooth blocking structure 100 of the first embodiment is the shape of the body 310.

[0066] Specifically, the body 310 comprises an inner edge surface 311, an outer edge surface 312 and two side surfaces 313. In the third embodiment, the outer edge surface 312 is a convex arc surface. Furthermore, the connection relationship of the inner edge surface 311, the outer edge surface 312 and the side surface 313 is the same as that of the inner edge surface 111, the outer edge surface 112 and the side surface 113 of the first embodiment, and the tooth portion 320 is the same as the tooth portion 120 of the first embodiment, and the details of the same elements are not described here. Furthermore, the shape of the inner recessed space 330 is the same as that of the inner recessed space 130 of the first embodiment, and the inner recessed space 330 can be a groove or a through hole, but the present utility model is not limited thereto.

[0067] Please refer to Figure 5 , Figure 5 is a front view of the tooth blocking structure 400 of the fourth embodiment of the present utility model. The tooth blocking structure 400 comprises a body 410, two tooth portions 420 and two inner recessed spaces 430. The two tooth portions 420 and the two inner recessed spaces 430 are arranged on the body 410. In the fourth embodiment, the tooth blocking structure 400 can be applied to a ratchet wrench and used to engage with a ratchet wheel, wherein the tooth blocking structure 400 can be integrally formed, but the present utility model is not limited thereto.

[0068] The body 410 comprises an inner edge surface 411, an outer edge surface 412 and two side surfaces 413, wherein the two side surfaces 413 are connected between the inner edge surface 411 and the outer edge surface 412. The tooth portion 420 is arranged on the inner edge surface 411. The two inner recessed spaces 430 are opened on the outer edge surface 412 and extend from the outer edge surface 412 to the inner edge surface 411, thereby forming two grooves in the body 410.

[0069] In Figure 5 the two tooth portions 420 respectively define a reference line L extending to the outer edge surface 412, a center of each inner recessed space 430 is not aligned with the reference line L, the two inner recessed spaces 430 respectively have an inner recessed space thickness d4 along the reference line L between the two inner recessed spaces 430 and the outer edge surface 412, and the two tooth portions 420 respectively have a tooth wall thickness d5 along the reference line L between the two tooth portions 420 and the two inner recessed spaces 430. Among them, the inner recessed space thickness d4 is greater than the tooth wall thickness d5.

[0070] Please refer to Figure 6 to Figure 8 , wherein Figure 6 is a perspective view of the tooth blocking structure 500 of the fifth embodiment of the present utility model, Figure 7 is Figure 6 a sectional view of the tooth blocking structure 500 along the section line 7-7 of the tooth blocking structure 500.Figure 8 yes Figure 6 A front view of a tooth retaining structure 500 is shown. The tooth retaining structure 500 comprises a main body 510, two tooth portions 520, and four grooves 530. In the fifth embodiment, the tooth retaining structure 500 can be used in a ratchet wrench and engage with a ratchet. The tooth retaining structure 500 can be integrally molded, but the present invention is not limited thereto.

[0071] The body 510 includes an inner edge surface 511, an outer edge surface 512 and two side surfaces 513, wherein the inner edge surface 511 and the outer edge surface 512 are disposed opposite to each other, and the two side surfaces 513 are disposed opposite to each other and connected between the inner edge surface 511 and the outer edge surface 512. Figure 6 As shown, in the tooth retaining structure 500, the inner edge surface 511 can be a concave arc surface, and the distance between the inner edge surface 511 and the outer edge surface 512 gradually increases from the center of the body 510 toward the ends of the body 510, so that the ends of the body 510 have a greater thickness than the center. In this way, when the tooth retaining structure 500 is used in a ratchet wrench, the inner edge surface 511 of the body 510 can correspond to the shape of a ratchet. The configuration of the greater thickness at the ends of the body 510 also provides the tooth retaining structure 500 with excellent structural strength, thereby improving the durability of the tooth retaining structure 500.

[0072] The two tooth portions 520 are separately disposed on the inner edge surface 511 of the body 510. Specifically, each tooth portion 520 includes a plurality of protruding teeth (not otherwise labeled) arranged side by side on the inner edge surface 511 of the body 510. The protruding teeth have a shape corresponding to that of a ratchet, allowing the tooth portions 520 of the tooth retaining structure 500 to engage with the ratchet.

[0073] Four grooves 530 are separately disposed on the body 510, with each groove 530 corresponding to one of the two teeth 520. Two of the four grooves 530 are recessed in one of the two side surfaces 513, and the other two are recessed in the other of the two side surfaces 513. Thus, by configuring the tooth retaining structure 500 to include the grooves 530, the grooves 530 provide space for the body 510 to deform when subjected to force. This avoids the risk of damage to the teeth 520 of the tooth retaining structure 500 due to excessive force applied by the ratchet wrench, thereby improving the durability of the tooth retaining structure 500. Furthermore, by disposing two of the four grooves 530 on one side surface 513 of the body 510 and the other two on the other side surface 513 of the body 510, the body 510 can be more easily retracted when subjected to force, thereby improving the durability of the tooth retaining structure 500. In addition, lubricating oil can also be contained in the groove 530 to prevent the gear structure 500 from getting stuck on the ratchet wheel, thereby further improving the service life of the gear structure 500 .

[0074] As shown in Figure 7 As shown in

[0075] Furthermore, in the tooth stopping structure 500, each groove 530 has a bottom surface 531, and the bottom surface 531 is a plane. In this way, the distance between the two oppositely arranged grooves 530 is equal from the center of the body 510 to the two ends of the body 510, which can provide excellent shrinking effect of the body 510 after being stressed.

[0076] As shown in Figure 8 As shown in

[0077] As shown in Figure 7 As shown in Figure 8 As shown in

[0078] As shown in Figure 9 As shown in Figure 10 As shown in Figure 9 is a perspective view of a tooth stopping structure 600 of a sixth embodiment of the present application, Figure 10 is Figure 9A sectional view of the tooth stopping structure 600 along the sectional line 10-10. The tooth stopping structure 600 comprises a body 610, two tooth portions 620, and four grooves 630. The tooth stopping structure 600 of the sixth embodiment differs from the tooth stopping structure 500 of the fifth embodiment in that the bottom surface 631 of the groove 630 is shaped as a concave arc surface. In this way, the manufacturing cost of the tooth stopping structure 600 can be reduced while maintaining the necessary structural strength of the body 610. Furthermore, by configuring the bottom surface 631 of the groove 630 as a concave arc surface, the groove 630 can accommodate more lubricating oil, and the use convenience of the tooth stopping structure 600 can be improved.

[0079] The body 610 comprises an inner edge surface 611, an outer edge surface 612, and two side surfaces 613, wherein the connection relationships of the inner edge surface 611, the outer edge surface 612, and the side surfaces 613 are the same as those of the inner edge surface 511, the outer edge surface 512, and the side surfaces 513 of the fifth embodiment, and the tooth portions 620 and the grooves 630 are the same as the tooth portions 520 and the grooves 530 of the fifth embodiment. Therefore, the details of the same elements are described in the description of the fifth embodiment, and are not described again here.

[0080] In summary, the tooth stopping structure of the present application has the following advantages. First, by configuring the tooth stopping structure to comprise an inner recessed space, a space for the body to be deformed inwardly under pressure is reserved during use of the ratchet wrench, thereby avoiding the problem of damage to the tooth stopping structure caused by excessive force, and further improving the durability and service life of the ratchet wrench. Second, by configuring the tooth stopping structure to comprise four grooves, two of the four grooves are arranged on one side surface of the body, and the other two of the four grooves are arranged on the other side surface of the body, the grooves can improve the inward deformation effect of the body under stress, thereby avoiding the risk of damage to the tooth portions of the tooth stopping structure caused by excessive force of the ratchet wrench. Furthermore, the grooves of the tooth stopping structure can also accommodate lubricating oil therein, thereby preventing the situation that the ratchet teeth of the ratchet wrench and the tooth stopping structure are rusted and stuck, and cannot be used normally. Third, by satisfying a specific size relationship between the groove width, the tooth wall thickness, and the wall thickness, the grooves can provide excellent inward deformation effect of the body under stress, thereby being conducive to further improving the durability of the tooth stopping structure. Fourth, by satisfying a specific range of the groove depth, the service life of the tooth stopping structure can be further improved. Therefore, the tooth stopping structure of the present application has commercial application potential in the related industry.

[0081] Although the present application has been disclosed in the above embodiments, it is not intended to limit the present application, and any person skilled in the art can make various modifications and improvements without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be defined by the appended claims.

Claims

1. A tooth-blocking structure, characterized in that: Include: A body comprising an inner edge surface and an outer edge surface, wherein the inner edge surface is disposed opposite to the outer edge surface; two teeth disposed at two ends of the inner edge surface; and Two concave spaces are provided on the main body and correspond to the two teeth respectively.

2. The retaining tooth structure according to claim 1, wherein: A reference line is defined from each of the two teeth and extends toward the outer edge surface, the two concave spaces each having a concave space thickness along the reference line, and a tooth wall thickness is defined between the two teeth and the two concave spaces along the reference line; The thickness of the concave space is greater than the thickness of the tooth wall.

3. The retaining tooth structure according to claim 2, wherein: There is a wall thickness between the two concave spaces and the outer edge surface along the reference line; The thickness of the concave space is greater than the thickness of the wall.

4. The retaining tooth structure according to claim 1, wherein: The ontology contains: Two side surfaces connected between the inner edge surface and the outer edge surface; The two concave spaces are opened on one side surface and extend from the one side surface toward the other side surface.

5. The retaining tooth structure according to claim 1, wherein: The two concave spaces are grooves or through holes.

6. The retaining tooth structure according to claim 1, wherein: The two concave spaces are circular or teardrop-shaped.

7. The retaining tooth structure according to claim 1, wherein: The inner edge surface is a concave arc surface.

8. The retaining tooth structure according to claim 1, wherein: The outer edge surface is a plane or a convex arc surface.

9. The retaining tooth structure according to claim 1, wherein: The two concave spaces are opened on the outer edge surface and extend from the outer edge surface toward the inner edge surface.

10. The retaining tooth structure according to claim 9, characterized in that: A reference line is defined from each of the two teeth and extends toward the outer edge surface, and a center of each of the concave spaces is not aligned with the reference line; There is a concave space thickness between the two concave spaces and the outer edge surface along the reference line, and there is a tooth wall thickness between the two teeth and the two concave spaces along the reference line; The thickness of the concave space is greater than the thickness of the tooth wall.

11. A tooth-blocking structure, characterized in that: Include: A body comprising an inner edge surface, an outer edge surface, and two side surfaces, wherein the inner edge surface is disposed opposite to the outer edge surface, and the two side surfaces are disposed opposite to and connected between the inner edge surface and the outer edge surface; Two teeth are separately disposed on the inner edge surface of the body; and Four grooves are separately arranged on the body, wherein each groove corresponds to one of the two teeth, two of the four grooves are recessed in one of the two side surfaces, and the other two of the four grooves are recessed in the other of the two side surfaces.

12. The retaining tooth structure according to claim 11, wherein: The inner edge surface is a concave arc surface.

13. The retaining tooth structure according to claim 11, wherein: Each of the grooves has a bottom surface, and the bottom surface is a plane or a concave arc surface.

14. The retaining tooth structure according to claim 11, wherein: One of the two teeth defines a reference line extending toward the outer edge surface, one of the four grooves has a groove width along the reference line, a wall thickness is provided between the one of the four grooves and the outer edge surface along the reference line, and the groove width is greater than the wall thickness.

15. The retaining tooth structure according to claim 14, wherein: Each of the grooves has a groove depth, the groove depth is perpendicular to the reference line, and the groove depth accounts for 25% to 35% of the thickness of the body.

16. A tooth-blocking structure, characterized in that: Include: A body comprising an inner edge surface, an outer edge surface, and two side surfaces, wherein the inner edge surface is disposed opposite to the outer edge surface, and the two side surfaces are disposed opposite to and connected between the inner edge surface and the outer edge surface; Two teeth are separately disposed on the inner edge surface of the body; and Four grooves are separately provided on the body, wherein each groove corresponds to one of the two teeth, two of the four grooves are recessed in one of the two side surfaces, and the other two of the four grooves are recessed in the other of the two side surfaces; Wherein, one of the two tooth portions defines a reference line extending toward the outer edge surface, the groove has a groove width along the reference line, and a tooth wall thickness is provided between the one of the two tooth portions and the groove along the reference line, and the groove width is greater than the tooth wall thickness.

17. The retaining tooth structure according to claim 16, wherein: The inner edge surface is a concave arc surface.

18. The retaining tooth structure according to claim 16, wherein: A wall thickness is provided between the groove and the outer edge surface along the reference line, and a width of the groove is greater than the wall thickness.

19. The retaining tooth structure according to claim 16, wherein: Each of the grooves has a bottom surface, and the bottom surface is a plane or a concave arc surface.

20. The retaining tooth structure according to claim 16, wherein: Each of the grooves has a groove depth, the groove depth is perpendicular to the reference line, and the groove depth accounts for 25% to 35% of the thickness of the body.

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