Universal screwdriver

Abstract

The embodiment of the utility model discloses a universal screwdriver. The universal screwdriver comprises a screwdriver rod, a connecting piece, a screwdriver head and an elastic assembly, the connecting piece is rotationally connected with one end of the screwdriver rod around a first rotating axis, the screwdriver head is rotationally connected with one end, away from the screwdriver rod, of the connecting piece around a second rotating axis, and the elastic assembly comprises at least two elastic pieces which abut against each other. Each elastic piece is provided with a convex surface and a concave surface which are oppositely arranged, the convex surfaces of the at least two elastic pieces abut against each other, or the concave surfaces of the at least two elastic pieces abut against each other; in the first direction, an elastic assembly is arranged between the screwdriver rod and the connecting piece; and / or in the second direction, an elastic assembly is arranged between the screwdriver head and the connecting piece. The at least two elastic pieces which are connected in series are arranged between the screwdriver rod and the connecting piece and / or between the screwdriver head and the connecting piece, so that the risk that the elastic pieces are fatigued or the damping performance is reduced due to abrasion is reduced, the damping service life of the elastic assembly is prolonged, and the angle of the screwdriver head can be kept relatively stable.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a universal screwdriver. Background Art

[0002] Hip replacement surgery is a surgical method to improve diseased hip joints, restore their normal physiological functions, correct deformed body shapes, etc. At present, acetabular prostheses are often used to replace diseased hip joints in hip replacement surgery. In order to enhance the initial stability of the acetabular prosthesis, screws are used for fixation during the operation. The universal screwdriver is a screw installation instrument widely used in hip replacement surgery. When using screws for fixation, it is necessary to place the screw on the head of the universal screwdriver, and rotate the head of the universal screwdriver to an angle that matches the human body posture or bones, and then place the screw in the position to be tightened, and finally tighten the screw to achieve the purpose of fixation. The existing universal screwdrivers mostly use the size matching method between the structures to prevent the head of the universal screwdriver from loosening. After a period of use, the sizes of the structures will change due to friction and fatigue. The head of the universal screwdriver is easy to loosen, and it is difficult to keep the head of the universal screwdriver stable at a certain angle, which makes it inconvenient to align the universal screwdriver with the screw, thereby affecting the implantation of the screw. Utility Model Content

[0003] The embodiment of the present application provides a universal screwdriver, which can solve the problem that the angle of the screwdriver head in the existing universal screwdriver cannot be kept stable.

[0004] The embodiment of the present application provides a universal screwdriver, comprising:

[0005] Screwdriver rod;

[0006] A connecting member, rotatably connected to one end of the screwdriver rod about a first rotation axis, wherein the first rotation axis extends along a first direction;

[0007] A screwdriver head is rotatably connected to an end of the connecting member away from the screwdriver rod around a second rotation axis, the second rotation axis extends along a second direction, and the second direction forms an angle with the first direction; the end of the screwdriver head away from the connecting member is used to hold the screw;

[0008] The elastic component comprises at least two elastic members abutting against each other, wherein the elastic members have a convex surface and a concave surface arranged opposite to each other, and the convex surfaces of at least two of the elastic members abut against each other or the concave surfaces of at least two of the elastic members abut against each other;

[0009] Wherein, in the first direction, the elastic component is arranged between the screwdriver rod and the connecting member; and / or,

[0010] In the second direction, the elastic component is arranged between the screwdriver head and the connecting member.

[0011] Optionally, in some embodiments, one of the end of the screwdriver rod facing the connecting member and the end of the connecting member facing the screwdriver rod has a first side wall, the first side wall forms a first accommodating cavity, and the other side wall corresponding to the first accommodating cavity is provided with a first mounting portion, the first mounting portion is located in the first accommodating cavity and is rotatably connected to the first side wall around the first rotation axis; the elastic component is located between the first mounting portion and the first side wall; and / or,

[0012] One of the end of the screwdriver head facing the connecting piece and the end of the connecting piece facing the screwdriver head has a second side wall, the second side wall forms a second accommodating cavity, and the other position corresponding to the second accommodating cavity is provided with a second mounting portion, the second mounting portion is located in the second accommodating cavity and is rotatably connected to the second side wall around the second rotation axis; the elastic component is located between the second mounting portion and the second side wall.

[0013] Optionally, in some embodiments, in the first direction, the first mounting portion has two opposite first side surfaces facing the first side wall, at least one of the first side surfaces is provided with a first mounting groove, and the elastic component is partially located in the first mounting groove; and / or,

[0014] In the second direction, the second mounting portion has two opposite second side surfaces facing the second side wall, at least one of the second side surfaces is provided with a second mounting groove, and the elastic component is partially located in the second mounting groove.

[0015] Optionally, in some embodiments, in the first direction, the elastic component is located on one side of the first mounting portion, and the other side of the first mounting portion abuts against the first side wall; and / or,

[0016] In the second direction, the elastic component is located on one side of the second mounting portion, and the other side of the second mounting portion abuts against the second side wall.

[0017] Optionally, in some embodiments, the elastic member includes a disc spring, and at least two of the disc springs are connected in series.

[0018] Optionally, in some embodiments, the outer diameter of the disc spring is greater than or equal to 5.5 mm and less than or equal to 6.5 mm; the inner diameter of the disc spring is greater than or equal to 3.2 mm and less than or equal to 3.3 mm; the thickness of the disc spring is greater than or equal to 0.35 mm and less than or equal to 0.45 mm.

[0019] Optionally, in some embodiments, the outer diameter of the disc spring is 6 mm, the inner diameter of the disc spring is 3.2 mm, and the thickness of the disc spring is 0.4 mm.

[0020] Optionally, in some embodiments, in the first direction, the screwdriver rod abuts against a concave surface of one of the disc springs, and the connecting member abuts against a concave surface of another disc spring; and / or,

[0021] In the second direction, the screwdriver head abuts against the concave surface of one of the disc springs, and the connecting member abuts against the concave surface of the other disc spring.

[0022] Optionally, in some embodiments, the elastic member comprises a disc spring;

[0023] In the first direction, a first gap is provided between the bottom of the first mounting groove and the corresponding first side wall, the disc spring is located in the first gap, and the first gap is greater than the sum of the thicknesses of the disc springs; and / or,

[0024] In the second direction, a second gap is provided between the second mounting groove and the corresponding second side wall, the disc spring is located in the second gap, and the second gap is greater than the sum of the thicknesses of the disc springs.

[0025] Optionally, in some embodiments, in the first direction, a third gap is provided between the first side surface and the corresponding first side wall, the elastic component is partially located in the third gap, and the third gap is greater than 0.03 mm and less than 0.09 mm; and / or,

[0026] In the second direction, a fourth gap is provided between the second side surface and the corresponding second side wall, the elastic component is partially located in the fourth gap, and the fourth gap is greater than 0.03 mm and less than 0.09 mm.

[0027] Optionally, in some embodiments, the universal screwdriver further comprises a fixing member, the inner surface of the elastic member encloses a fixing hole, the fixing hole penetrates the convex surface and the concave surface of the elastic member, the fixing member passes through the fixing hole, and connects the screwdriver rod and the connecting member or connects the screwdriver head and the connecting member;

[0028] There is a fifth gap between the inner surface of the elastic member and the outer surface of the fixing member, and the fifth gap is smaller than 0.05 mm.

[0029] Optionally, in some embodiments, the end of the screwdriver rod facing the connecting piece has the first side wall, the first side wall forms the first accommodating cavity, and the first accommodating cavity penetrates the opposite sides of the screwdriver rod along the second direction; in the direction along the bottom of the first accommodating cavity toward the screwdriver head, the distance between the opposite sides of the first side wall in the second direction decreases.

[0030] Optionally, in some embodiments, the first side wall has a first curved surface facing the screwdriver head, and two second curved surfaces arranged opposite to each other along the second direction, the first curved surface is located between the two second curved surfaces, one end of the second curved surface is connected to the first curved surface, and the other end of the second curved surface extends to the bottom of the first accommodating cavity.

[0031] Optionally, in some embodiments, the radius of curvature of the first curved surface is greater than or equal to 4 mm; the radius of curvature of the second curved surface is greater than or equal to 26 mm.

[0032] In the embodiment of the present application, the universal screwdriver includes a screwdriver rod, a connecting piece, a screwdriver head and an elastic component, the connecting piece is rotatably connected to one end of the screwdriver rod around a first rotation axis, the first rotation axis extends along a first direction, the screwdriver head is rotatably connected to one end of the connecting piece away from the screwdriver rod around a second rotation axis, the second rotation axis extends along a second direction, the second direction forms an angle with the first direction, the end of the screwdriver head away from the connecting piece is used to hold the screw, and the elastic component includes at least two elastic parts abutting against each other, the elastic parts have convex surfaces and concave surfaces arranged relatively to each other, the convex surfaces of at least two elastic parts abut against each other or the concave surfaces of at least two elastic parts abut against each other; wherein, in the first direction, an elastic component is arranged between the screwdriver rod and the connecting piece; and / or, in the second direction, an elastic component is arranged between the screwdriver head and the connecting piece. In the embodiment of the present application, at least two elastic members connected in series are arranged between the screwdriver rod and the connecting member and / or between the screwdriver head and the connecting member to reduce the risk of fatigue or degradation of damping performance of the elastic members due to wear during the use of the universal screwdriver, thereby increasing the damping life of the entire elastic component and allowing the angle of the screwdriver head of the universal screwdriver to remain relatively stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a schematic diagram of the exploded structure of a universal screwdriver provided in an embodiment of the present application;

[0035] Figure 2 It is a schematic diagram of the assembly structure of a universal screwdriver provided in an embodiment of the present application;

[0036] Figure 3 The embodiment of this application provides Figure 2 Schematic diagram of the enlarged structure of the A area in the middle;

[0037] Figure 4 The embodiment of this application provides Figure 2 Schematic diagram of the cross-sectional structure from the perspective of the middle BB;

[0038] Figure 5 The embodiment of this application provides Figure 4 Schematic diagram of the enlarged structure of the D region in the middle;

[0039] Figure 6 The embodiment of this application provides Figure 2 Schematic diagram of the cross-sectional structure from the CC perspective;

[0040] Figure 7 The embodiment of this application provides Figure 6 Schematic diagram of the enlarged structure of area E in the middle.

[0041] Description of reference numerals:

[0042] 100, universal screwdriver; 110, screwdriver rod; 111, first accommodating cavity; 112, first curved surface; 113, second curved surface; 114, first side wall; 120, connecting member; 121, first mounting portion; 1211, first side surface; 1212, first mounting groove; 122, second mounting portion; 1221, second side surface; 1222, second mounting groove; 130, screwdriver head; 131, second accommodating cavity; 132, second side wall; 140, elastic component; 141, elastic member; 1411, fixing hole; 150, fixing member;

[0043] a, first rotation axis; b, second rotation axis; X, first direction; Y, second direction; L1, first gap; L2, second gap; L3, third gap; L4, fourth gap; L5, fifth gap. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0045] The embodiment of the present application provides a universal screwdriver, which is described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0046] like Figure 1 and Figure 2 As shown, the universal screwdriver 100 includes a screwdriver rod 110, a connecting member 120 and a screwdriver head 130. The connecting member 120 is rotatably connected to one end of the screwdriver rod 110 around a first rotation axis a, the first rotation axis a extends along a first direction X, the screwdriver head 130 is rotatably connected to one end of the connecting member 120 away from the screwdriver rod 110 around a second rotation axis b, the second rotation axis b extends along a second direction Y, the second direction Y forms an angle with the first direction X, and the end of the screwdriver head 130 away from the connecting member 120 is used to hold the screw. That is, the screwdriver rod 110 and the screwdriver head 130 are rotatably connected to both ends of the connecting member 120, respectively, and the rotation axis of the screwdriver rod 110 relative to the connecting member 120 and the rotation axis of the screwdriver head 130 relative to the connecting member 120 extend in different directions, so that the angle of the screwdriver head 130 can be adjusted in two directions, thereby helping to increase the adjustment range of the angle of the screwdriver head 130 to meet the use requirements of the screwdriver head 130 at different angles.

[0047] The universal screwdriver 100 also includes an elastic component 140, which includes at least two elastic members 141 abutting against each other. The elastic member 141 has a convex surface and a concave surface arranged relatively to each other. The convex surfaces of at least two elastic members 141 abut against each other or the concave surfaces of at least two elastic members 141 abut against each other, that is, at least two elastic members 141 are arranged in series with each other, so that the compression stroke of the elastic component 140 is at least doubled, thereby reducing the risk of the elastic component 140 having no damping or significantly reduced damping due to flattening, avoiding fatigue of the elastic component 140 during use, and thereby improving the damping life of the elastic component 140.

[0048] Among them, Figure 3As shown, in the first direction X, an elastic component 140 is provided between the screwdriver rod 110 and the connecting member 120; and / or, in the second direction Y, an elastic component 140 is provided between the screwdriver head 130 and the connecting member 120. During the use of the universal screwdriver 100, when the screwdriver head 130 is used to cooperate with the screw and tighten the screw, the screwdriver head 130 and the connecting member 120, as well as the screwdriver rod 110 and the connecting member 120, are subjected to friction and fatigue, and their dimensions may change, making the screwdriver head 130 easy to loosen and difficult to stably maintain at a certain angle, thereby making it inconvenient to align the universal screwdriver 100 with the screw, thereby affecting the implantation of the screw. The present application arranges an elastic component 140 between the screwdriver rod 110 and the connecting member 120 and / or the screwdriver head 130 and the connecting member 120, so that the elastic effect of the elastic component 140 can be used to maintain the relative stability between the screwdriver rod 110 and the connecting member 120 and / or the screwdriver head 130 and the connecting member 120, so that the angle of the screwdriver head 130 of the universal screwdriver 100 can remain relatively stable for a long time.

[0049] In the embodiment of the present application, at least two elastic members 141 abutting against each other are provided between the screwdriver rod 110 and the connecting member 120 or between the screwdriver head 130 and the connecting member 120, and the damping performance between the screwdriver rod 110 and the connecting member 120 or between the screwdriver head 130 and the connecting member 120 is improved by the series connection of at least two elastic members 141, thereby reducing the risk of fatigue or reduction in damping performance of the elastic member 141 due to wear during the use of the universal screwdriver 100, thereby increasing the damping life of the elastic component 140 as a whole, and further allowing the angle of the screwdriver head 130 of the universal screwdriver 100 to remain relatively stable.

[0050] Optional, such as Figure 4 As shown, one of the end of the screwdriver rod 110 facing the connecting member 120 and the end of the connecting member 120 facing the screwdriver rod 110 has a first side wall 114, the first side wall 114 forms a first accommodating cavity 111, and the other position corresponding to the first accommodating cavity 111 is provided with a first mounting portion 121, the first mounting portion 121 is located in the first accommodating cavity 111, and is rotatably connected to the first side wall 114 around a first rotation axis a, and the elastic component 140 is located between the first mounting portion 121 and the first side wall 114. That is, the first mounting portion 121 rotates around the first rotation axis a in the first accommodating cavity 111, and the elastic component 140 is located between the first mounting portion 121 and the first side wall 114 in the first direction X to provide a force along the first direction X to the first mounting portion 121, and provide a force in the opposite direction of the first direction X to the first side wall 114, so that the first mounting portion 121 and the first side wall 114 are stably matched in the first direction X, avoiding the screwdriver rod 110 from shaking relative to the connecting member 120 in the first direction X, thereby ensuring the relative stability of the angle of the screwdriver head 130.

[0051] Among them, in the first direction X, the elastic component 140 can be set on one side of the first mounting portion 121, and can also be set on two opposite sides of the first mounting portion 121. The specific setting method can be selected and adjusted according to actual design requirements, and there is no special limitation here.

[0052] Specifically, the first mounting portion 121 and the first side wall 114 can be hinged by a pin, that is, the pin passes through the first side wall 114 and the first mounting portion 121 in sequence along the first direction X, and the first mounting portion 121 can rotate around the pin relative to the first side wall 114 in the first accommodating cavity 111, and the elastic component 140 is sleeved on the pin. It should be noted that, in addition to the pin hinge, the specific connection method can also be selected and adjusted according to actual design requirements, and is not particularly limited here.

[0053] Correspondingly, such as Figure 6 As shown, one of the end of the screwdriver head 130 facing the connecting member 120 and the end of the connecting member 120 facing the screwdriver head 130 has a second side wall 132, and the second side wall 132 forms a second accommodating cavity 131. A second mounting portion 122 is provided at the other position corresponding to the second accommodating cavity 131. The second mounting portion 122 is located in the second accommodating cavity 131 and is rotatably connected to the second side wall 132 around a second rotation axis b. The elastic component 140 is located between the second mounting portion 122 and the second side wall 132. That is, the second mounting portion 122 rotates around the second rotation axis b in the second accommodating cavity 131, and the elastic component 140 is located between the second mounting portion 122 and the second side wall 132 in the second direction Y to provide a force along the second direction Y to the second mounting portion 122, and a force in the opposite direction of the second direction Y to the second side wall 132, so that the second mounting portion 122 and the second side wall 132 are stably matched in the second direction Y, avoiding the screwdriver head 130 from shaking relative to the connecting member 120 in the second direction Y, thereby ensuring the relative stability of the angle of the screwdriver head 130.

[0054] Among them, in the second direction Y, the elastic component 140 can be set on one side of the second mounting portion 122, and can also be set on two opposite sides of the second mounting portion 122. Its specific setting method can be selected and adjusted according to actual design requirements, and there is no special limitation here.

[0055] Specifically, the second mounting portion 122 and the second side wall 132 can be hinged by a pin, that is, the pin passes through the second side wall 132 and the second mounting portion 122 in sequence along the second direction Y, and the second mounting portion 122 can rotate relative to the second side wall 132 around the pin in the second accommodating cavity 131, and the elastic component 140 is sleeved on the pin. It should be noted that, in addition to the pin hinge, the specific connection method can also be selected and adjusted according to actual design requirements, and is not particularly limited here.

[0056] In some embodiments, Figure 4 As shown, in the first direction X, the first mounting portion 121 has two opposite first side surfaces 1211 facing the first side wall 114, at least one of the first side surfaces 1211 is provided with a first mounting groove 1212, and the elastic component 140 is partially located in the first mounting groove 1212. That is, the elastic component 140 is partially located in the first mounting groove 1212 and partially located outside the first mounting groove 1212, so as to ensure elastic fit between at least one side of the first mounting portion 121 and the first side wall 114, thereby ensuring stable fit between the first mounting portion 121 and the first side wall 114 in the first direction X. By partially arranging the elastic component 140 in the first mounting groove 1212, the installation stability of the elastic component 140 between the first mounting portion 121 and the first side wall 114 can be improved.

[0057] Among them, when the elastic component 140 is arranged on the opposite sides of the first mounting portion 121, the first mounting grooves 1212 are opened on the two first side surfaces 1211, and the elastic components 140 are partially located in the corresponding first mounting grooves 1212, so that the two sides of the first mounting portion 121 and the first side wall 114 are elastically matched, so as to improve the matching stability between the first mounting portion 121 and the first side wall 114 in the first direction X.

[0058] Correspondingly, such as Figure 6 As shown, in the second direction Y, the second mounting portion 122 has two opposite second side surfaces 1221 facing the second side wall 132, at least one of the second side surfaces 1221 is provided with a second mounting groove 1222, and the elastic component 140 is partially located in the second mounting groove 1222. That is, the elastic component 140 is partially located in the second mounting groove 1222 and partially located outside the second mounting groove 1222, so as to ensure elastic fit between at least one side of the second mounting portion 122 and the second side wall 132, thereby ensuring stable fit between the second mounting portion 122 and the second side wall 132 in the second direction Y. By partially arranging the elastic component 140 in the second mounting groove 1222, the installation stability of the elastic component 140 between the second mounting portion 122 and the second side wall 132 can be improved.

[0059] Among them, when the elastic component 140 is arranged on the opposite sides of the second mounting portion 122, second mounting grooves 1222 are opened on the two second side surfaces 1221, and the elastic components 140 are partially located in the corresponding second mounting grooves 1222, so that the two sides of the second mounting portion 122 and the second side wall 132 are elastically matched, so as to improve the matching stability between the second mounting portion 122 and the second side wall 132 in the second direction Y.

[0060] In other embodiments, Figure 4As shown, in the first direction X, the elastic component 140 is located on one side of the first mounting portion 121, and the other side of the first mounting portion 121 abuts against the first side wall 114. That is, the elastic component 140 is only arranged on one side of the first mounting portion 121, and the other side of the first mounting portion 121 directly abuts against the corresponding first side wall 114. Compared with the elastic component 140 being arranged on both sides at the same time, the problem of poor damping consistency caused by the size error and installation error of the first mounting groove 1212 can be avoided, and the difficulty of production and installation can also be reduced.

[0061] Correspondingly, such as Figure 6 As shown, in the second direction Y, the elastic component 140 is located on one side of the second mounting portion 122, and the other side of the second mounting portion 122 abuts against the second side wall 132. That is, the elastic component 140 is only provided on one side of the second mounting portion 122, and the other side of the second mounting portion 122 directly abuts against the corresponding second side wall 132. Compared with providing the elastic component 140 on both sides at the same time, the problem of poor damping consistency caused by the size error and installation error of the second mounting groove 1222 can be avoided, and the difficulty of production and installation can also be reduced.

[0062] Optionally, the elastic member 141 used in the embodiment of the present application includes a disc spring, and at least two disc springs are connected in series, that is, the elastic component 140 is composed of at least two disc springs stacked together, and at least two disc springs are connected in series, that is, the convex surfaces of at least two disc springs abut against each other or the concave surfaces of at least two disc springs abut against each other. By setting the parameters of the disc springs such as the thickness, outer diameter and free height of the disc springs, the compression amount and compression stroke of the disc spring combination can be adjusted, thereby reducing disc spring fatigue and increasing the damping life of the disc spring.

[0063] Among them, the parameters of the disc spring can be set so that the outer diameter of the disc spring is greater than or equal to 5.5mm and less than or equal to 6.5mm, the inner diameter of the disc spring is greater than or equal to 3.2mm and less than or equal to 3.3mm, and the thickness of the disc spring is greater than or equal to 0.35mm and less than or equal to 0.45mm, so that the compression of the disc spring combination is less than 75%, so as to reduce the fatigue of the disc spring and increase the damping life of the disc spring, so that the angle of the screwdriver head 130 of the universal screwdriver 100 can remain relatively stable for a long time, so as to facilitate the alignment of the screws and the implantation of the screws.

[0064] Specifically, in the actual manufacturing process, the outer diameter of the disc spring can be set to 5.5mm, 6mm or 6.5mm, the inner diameter of the disc spring can be set to 3.2mm, 3.25mm or 3.3mm, the thickness of the disc spring can be set to 0.35mm, 0.4mm or 0.45mm, etc. The specific parameter values ​​can be selected and adjusted according to the actual use requirements, and there is no special restriction here. Among them, in the embodiment of the present application, it is preferably designed that the outer diameter of the disc spring is 6mm, the inner diameter of the disc spring is 3.2mm, and the thickness of the disc spring is 0.4mm. Correspondingly, the working height of the disc spring is 0.46mm and the free height is 0.55mm, so as to meet the damping performance of the disc spring during use, thereby meeting the angle of the screwdriver head 130 of the universal screwdriver 100 can remain relatively stable for a long time.

[0065] In addition, the material type of the disc spring in the embodiment of the present application can be 17-7PH martensitic precipitation hardening stainless steel. This material is easy to adjust the strength level and can achieve controlled strength by changing the heat treatment process. It also has stable elasticity and tensile strength, as well as strong fatigue resistance. As a result, during the use of the universal screwdriver 100, it can effectively reduce the fatigue of the disc spring and increase the damping life of the disc spring, thereby allowing the angle of the screwdriver head 130 of the universal screwdriver 100 to remain relatively stable for a long time, so as to facilitate the alignment of the screws and the implantation of the screws.

[0066] In some embodiments, Figure 4 As shown, in the first direction X, the screwdriver rod 110 abuts against the concave surface of one of the disc springs, and the connecting member 120 abuts against the concave surface of the other disc spring, that is, the screwdriver rod 110 and the connecting member 120 abut against the outer diameter of the corresponding disc spring, respectively, so that there is a sufficient abutment area between the screwdriver rod 110 and the connecting member 120 and the disc spring, which helps to improve the abutment stability between the screwdriver rod 110 and the connecting member 120 and the disc spring.

[0067] Among them, when the elastic component 140 is composed of two disc springs, the convex surfaces of the two disc springs abut against each other, that is, the inner diameters of the two disc springs abut against each other, so that the contact area between the disc springs is small, which helps to reduce the wear of the disc springs and the disc springs themselves, and then improve the damping life of the disc springs, so that the angle of the screwdriver head 130 of the universal screwdriver 100 can remain relatively stable for a longer period of time.

[0068] Correspondingly, such as Figure 6 As shown, in the second direction Y, the screwdriver head 130 abuts against the concave surface of one of the disc springs, and the connecting member 120 abuts against the concave surface of the other disc spring, that is, the screwdriver head 130 and the connecting member 120 abut against the outer diameter of the corresponding disc springs, respectively, so that there is a sufficient abutment area between the screwdriver head 130 and the connecting member 120 and the disc springs, which helps to improve the abutment stability between the screwdriver head 130 and the connecting member 120 and the disc springs.

[0069] Among them, when the elastic component 140 is composed of two disc springs, the convex surfaces of the two disc springs abut against each other, that is, the inner diameters of the two disc springs abut against each other, so that the contact area between the disc springs is small, which helps to reduce the wear of the disc springs and the disc springs themselves, and then improve the damping life of the disc springs, so that the angle of the screwdriver head 130 of the universal screwdriver 100 can remain relatively stable for a longer period of time.

[0070] In other embodiments, Figure 4 and Figure 5 As shown, in the first direction X, there is a first gap L1 between the bottom of the first installation groove 1212 and the corresponding first side wall 114, and the disc spring is located in the first gap L1, and the first gap L1 is greater than the sum of the thicknesses of the disc spring. Since the disc spring has a convex surface and a concave surface, when the disc spring is deformed by force, the limit case is that the disc spring is flattened, that is, the distance between the bottom of the first installation groove 1212 and the corresponding first side wall 114 is the sum of the thicknesses of multiple disc springs in the elastic component 140. At this time, the elastic component 140 can no longer continue to play a damping role. In this embodiment, by setting the first gap L1 to be greater than the sum of the thicknesses of the disc springs, it can effectively prevent the disc spring from losing its damping effect due to being flattened, and it is also convenient for the assembly of the disc spring.

[0071] Correspondingly, such as Figure 6 and Figure 7 As shown, in the second direction Y, there is a second gap L2 between the second mounting groove 1222 and the corresponding second side wall 132, the disc spring is located in the second gap L2, and the second gap L2 is greater than the sum of the thicknesses of the disc springs. Similarly, in this embodiment, by setting the second gap L2 to be greater than the sum of the thicknesses of the disc springs, the disc spring can be effectively prevented from losing its damping effect due to being flattened, and the assembly of the disc spring is also facilitated.

[0072] In some other embodiments, Figure 4 and Figure 5As shown, in the first direction X, there is a third gap L3 between the first side surface 1211 and the corresponding first side wall 114, and the elastic component 140 is partially located in the third gap L3, and the third gap L3 is greater than 0.03mm and less than 0.09mm. During the use of the universal screwdriver 100, when the screwdriver head 130 rotates relative to the connecting member 120, the connecting member 120 may move relatively along the first direction X, thereby squeezing the disc spring located in the third gap L3. By setting the third gap L3 to be less than 0.09mm, the dynamic load on the disc spring during the movement of the connecting member 120 can be reduced, thereby improving the damping life of the disc spring. At the same time, it can also reduce the solid impurities (such as bone residue) entering between the disc springs during the operation, thereby avoiding damping jamming during use. After the operation is completed, the universal screwdriver 100 needs to be processed. By setting the third gap L3 to be greater than 0.03mm, it is helpful to clean and disinfect the universal screwdriver 100 after the operation.

[0073] In the actual manufacturing process, the third gap L3 can be set to 0.04mm, 0.05mm, 0.06mm, 0.07mm or 0.08mm, etc. The specific value can be selected and adjusted according to actual design requirements, and there is no special limitation here.

[0074] Correspondingly, such as Figure 6 and Figure 7 As shown, in the second direction Y, there is a fourth gap L4 between the second side surface 1221 and the corresponding second side wall 132, and the elastic component 140 is partially located in the fourth gap L4, and the fourth gap L4 is greater than 0.03mm and less than 0.09mm. During the use of the universal screwdriver 100, when the screwdriver rod 110 rotates relative to the connecting member 120, the connecting member 120 may move relatively along the second direction Y, thereby squeezing the disc spring located in the fourth gap L4. By setting the fourth gap L4 to be less than 0.09mm, the dynamic load on the disc spring during the movement of the connecting member 120 can be reduced, thereby improving the damping life of the disc spring. At the same time, it can also reduce the entry of solid impurities (such as bone residue) between the disc springs during the operation, thereby avoiding damping jamming during use. Similarly, by setting the fourth gap L4 to be greater than 0.03mm, it is helpful to clean and disinfect the universal screwdriver 100 after the operation.

[0075] In the actual manufacturing process, the fourth gap L4 can be set to 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm or 0.08 mm, etc. The specific value can be selected and adjusted according to actual design requirements, and there is no special limitation here.

[0076] Optional, such as Figure 5 and Figure 7As shown, the universal screwdriver 100 also includes a fixing member 150, and the inner surface of the elastic member 141 encloses a fixing hole 1411, and the fixing hole 1411 passes through the convex surface and the concave surface of the elastic member 141. The fixing member 150 passes through the fixing hole 1411 and connects the screwdriver rod 110 and the connecting member 120 or connects the screwdriver head 130 and the connecting member 120, that is, the elastic member 141 is sleeved on the fixing member 150 and abuts between the screwdriver rod 110 and the connecting member 120 or between the screwdriver head 130 and the connecting member 120.

[0077] There is a fifth gap L5 between the inner surface of the elastic member 141 and the outer surface of the fixing member 150, and the fifth gap L5 is less than 0.05 mm, that is, the aperture of the fixing hole 1411 on the elastic member 141 is slightly larger than the diameter of the fixing member 150, so as to facilitate the assembly between the elastic member 141 and the fixing member 150. In the embodiment of the present application, by setting the fifth gap L5 to be less than 0.05 mm, it is helpful to reduce the radial displacement of the disc spring, thereby reducing the friction that may be generated by the disc spring, and thus improving the damping life of the disc spring.

[0078] In the actual manufacturing process, the fifth gap L5 can be set to 0.02 mm, 0.03 mm or 0.04 mm, etc. The specific value can be selected and adjusted according to actual design requirements, and there is no special limitation here.

[0079] Optional, such as Figure 4 As shown, the end of the screwdriver rod 110 facing the connecting member 120 has a first side wall 114, and the first side wall 114 forms a first accommodating cavity 111, and the first accommodating cavity 111 penetrates the opposite sides of the screwdriver rod 110 along the second direction Y. That is, the first accommodating cavity 111 on the screwdriver rod 110 is U-shaped, and the opposite sides of the connecting member 120 in the first direction X are clamped in the first accommodating cavity 111, and correspondingly, the second accommodating cavity 131 on the screwdriver head 130 is also U-shaped, and the opposite sides of the connecting member 120 in the second direction Y are clamped in the second accommodating cavity 131.

[0080] Among them, in the direction along the bottom of the first accommodating cavity 111 toward the screwdriver head 130, the distance between the opposite sides of the first side wall 114 in the second direction Y decreases, that is, the width of the first side wall 114 in the second direction Y tends to decrease toward the direction approaching the screwdriver head 130, that is, the first side wall 114 forms a cone-like structure toward the direction approaching the screwdriver head 130, so as to avoid interference between the screwdriver head 130 and the screwdriver rod 110 when the screwdriver head 130 rotates around the second rotation axis b, and the screwdriver head 130 can contact the screwdriver rod 110 when reciprocating within 180°, so as to reduce the rotation jump of the screwdriver head 130 and improve the rotation smoothness of the screwdriver head 130.

[0081] In some embodiments, Figure 3As shown, the first side wall 114 has a first curved surface 112 facing the screwdriver head 130, and two second curved surfaces 113 arranged opposite to each other along the second direction Y, the first curved surface 112 is located between the two second curved surfaces 113, one end of the second curved surface 113 is connected to the first curved surface 112, and the other end of the second curved surface 113 extends to the bottom of the first accommodating cavity 111. That is, the side surface of the first side wall 114 is formed by continuous transition of three sections of curved surfaces, and the connecting edges of the first curved surface 112 and the second curved surface 113 are smoothly tangent to form a complete smooth curved surface. This arrangement can avoid interference between the screwdriver head 130 and the screwdriver rod 110 when rotating around the second rotation axis b, and can also reduce the damage of the screwdriver rod 110 to human tissue when the universal screwdriver 100 is put into use.

[0082] The radius of curvature of the first curved surface 112 is greater than or equal to 4 mm, the radius of curvature of the second curved surface 113 is greater than or equal to 26 mm, the first curved surface 112 is a complete semicircular surface, and the second curved surface 113 is an arc surface, and the semicircular surface is tangently connected to the arc surface to achieve a smooth transition between the first curved surface 112 and the second curved surface 113. The specific values ​​of the radius of curvature of the first curved surface 112 and the second curved surface 113 can be selected and adjusted according to actual design requirements, and are not particularly limited here.

[0083] The universal screwdriver provided in the embodiment of the present application is introduced in detail above. The principle and implementation mode of the present application are explained in this article by using specific examples. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A universal screwdriver, characterized in that: include: Screwdriver rod; A connecting member, rotatably connected to one end of the screwdriver rod about a first rotation axis, wherein the first rotation axis extends along a first direction; A screwdriver head is rotatably connected to an end of the connecting member away from the screwdriver rod around a second rotation axis, the second rotation axis extends along a second direction, and the second direction forms an angle with the first direction; the end of the screwdriver head away from the connecting member is used to hold the screw; The elastic component comprises at least two elastic members abutting against each other, wherein the elastic members have a convex surface and a concave surface arranged opposite to each other, and the convex surfaces of at least two of the elastic members abut against each other or the concave surfaces of at least two of the elastic members abut against each other; Wherein, in the first direction, the elastic component is arranged between the screwdriver rod and the connecting member; and / or, In the second direction, the elastic component is arranged between the screwdriver head and the connecting member.

2. The universal screwdriver according to claim 1, characterized in that: One of the end of the screwdriver rod facing the connecting member and the end of the connecting member facing the screwdriver rod has a first side wall, the first side wall forms a first accommodating cavity, and the other side wall corresponding to the first accommodating cavity is provided with a first mounting portion, the first mounting portion is located in the first accommodating cavity and is rotatably connected to the first side wall around the first rotation axis; the elastic component is located between the first mounting portion and the first side wall; and / or, One of the end of the screwdriver head facing the connecting piece and the end of the connecting piece facing the screwdriver head has a second side wall, the second side wall forms a second accommodating cavity, and the other position corresponding to the second accommodating cavity is provided with a second mounting portion, the second mounting portion is located in the second accommodating cavity and is rotatably connected to the second side wall around the second rotation axis; the elastic component is located between the second mounting portion and the second side wall.

3. The universal screwdriver according to claim 2, characterized in that: In the first direction, the first mounting portion has two opposite first side surfaces facing the first side wall, at least one of the first side surfaces is provided with a first mounting groove, and the elastic component is partially located in the first mounting groove; and / or, In the second direction, the second mounting portion has two opposite second side surfaces facing the second side wall, at least one of the second side surfaces is provided with a second mounting groove, and the elastic component is partially located in the second mounting groove.

4. The universal screwdriver according to claim 2, characterized in that: In the first direction, the elastic component is located on one side of the first mounting portion, and the other side of the first mounting portion abuts against the first side wall; and / or, In the second direction, the elastic component is located on one side of the second mounting portion, and the other side of the second mounting portion abuts against the second side wall.

5. The universal screwdriver according to any one of claims 1 to 4, characterized in that: The elastic member comprises a disc spring, and at least two of the disc springs are connected in series.

6. The universal screwdriver according to claim 5, characterized in that: The outer diameter of the disc spring is greater than or equal to 5.5 mm and less than or equal to 6.5 mm, the inner diameter of the disc spring is greater than or equal to 3.2 mm and less than or equal to 3.3 mm, and the thickness of the disc spring is greater than or equal to 0.35 mm and less than or equal to 0.45 mm.

7. The universal screwdriver according to claim 6, characterized in that: The outer diameter of the disc spring is 6 mm, the inner diameter of the disc spring is 3.2 mm, and the thickness of the disc spring is 0.4 mm.

8. The universal screwdriver according to claim 5, characterized in that: In the first direction, the screwdriver rod abuts against a concave surface of one of the disc springs, and the connecting member abuts against a concave surface of another disc spring; and / or, In the second direction, the screwdriver head abuts against the concave surface of one of the disc springs, and the connecting member abuts against the concave surface of the other disc spring.

9. The universal screwdriver according to claim 3, characterized in that: The elastic member comprises a disc spring; In the first direction, there is a first gap between the bottom of the first mounting groove and the corresponding first side wall, the disc spring is located in the first gap, and the first gap is greater than the sum of the thicknesses of the disc springs; and / or, In the second direction, a second gap is provided between the second mounting groove and the corresponding second side wall, the disc spring is located in the second gap, and the second gap is greater than the sum of the thicknesses of the disc springs.

10. The universal screwdriver according to claim 9, characterized in that: In the first direction, a third gap is provided between the first side surface and the corresponding first side wall, the elastic component is partially located in the third gap, and the third gap is greater than 0.03 mm and less than 0.09 mm; and / or, In the second direction, a fourth gap is provided between the second side surface and the corresponding second side wall, the elastic component is partially located in the fourth gap, and the fourth gap is greater than 0.03 mm and less than 0.09 mm.

11. The universal screwdriver according to claim 1, characterized in that: The universal screwdriver further comprises a fixing member, the inner surface of the elastic member encloses a fixing hole, the fixing hole penetrates the convex surface and the concave surface of the elastic member, the fixing member passes through the fixing hole, and connects the screwdriver rod and the connecting member or connects the screwdriver head and the connecting member; There is a fifth gap between the inner surface of the elastic member and the outer surface of the fixing member, and the fifth gap is smaller than 0.05 mm.

12. The universal screwdriver according to claim 2, characterized in that: The end of the screwdriver rod facing the connecting piece has the first side wall, the first side wall forms the first accommodating cavity, and the first accommodating cavity penetrates the opposite sides of the screwdriver rod along the second direction; in the direction along the bottom of the first accommodating cavity toward the screwdriver head, the distance between the opposite sides of the first side wall in the second direction decreases.

13. The universal screwdriver according to claim 12, characterized in that: The first side wall has a first curved surface facing the screwdriver head, and two second curved surfaces arranged opposite to each other along the second direction, the first curved surface is located between the two second curved surfaces, one end of the second curved surface is connected to the first curved surface, and the other end of the second curved surface extends to the bottom of the first accommodating cavity.

14. The universal screwdriver according to claim 13, characterized in that: The radius of curvature of the first curved surface is greater than or equal to 4 mm; the radius of curvature of the second curved surface is greater than or equal to 26 mm.

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