Dental gripper

Abstract

The utility model relates to the field of medical equipment, and provides a dental holder which can comprise a holding rod, a first clamping arm, a second clamping arm, an adjusting sleeve and a third clamping arm. One end of a first connecting rod of the first clamping arm is rotationally connected with the holding rod, the other end of the first connecting rod is rotationally connected with a first clamping part, and the first clamping part is provided with a first flexible contact part; the second clamping arm is located on the side, facing the handheld end, of the first clamping arm, one end of a second connecting rod of the second clamping arm is connected with the holding rod, the other end of the second connecting rod of the second clamping arm is connected with a second clamping part, and the second clamping part is provided with a second flexible contact part; the circumferential outer side of the holding rod is sleeved with the adjusting sleeve, and the adjusting sleeve can slide between the handheld end and the second clamping arm; one end of a third connecting rod of the third clamping arm is rotationally connected with the adjusting sleeve, the other end of the third connecting rod is rotationally connected with a third clamping part, and the third clamping part is provided with a third flexible contact part. According to the dental holder provided by the embodiment of the invention, the clamping stability of the to-be-clamped object is ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical equipment, and in particular to a dental holder. Background Art

[0002] In dental clinics and teaching, high-speed drills are often required to perform fine shape preparation, grinding, polishing and other operations on irregular small objects.

[0003] For example, crowns, post cores and other restorations need to be finely ground and polished; in teaching, ex vivo teeth or resin teeth need to be prepared into various cavity types and preparations; in some ex vivo tooth reprocessing, they need to be ground and cut. These operations require one hand to hold a small object and the other hand to grind and cut with a high-speed drill. The fingers that hold the object are easily cut and the gloves are easily torn, which is a problem that often troubles operators.

[0004] Due to the irregular shape of teeth, existing clamping tools (such as tweezers and pliers) cannot firmly clamp the teeth to facilitate operation. Utility Model Content

[0005] In order to solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides a dental holder.

[0006] The present application discloses a dental clamp, which may include: a gripping rod, which includes a gripping end and a hand-held end facing each other; a first gripping arm, which is arranged close to the gripping end, and includes a first connecting rod and a first gripping portion, one end of the first connecting rod is rotatably connected to the gripping rod, and the other end is rotatably connected to the first gripping portion, the first gripping portion includes a first gripping surface facing an object to be gripped, and a first flexible contact portion is arranged on the first gripping surface; a second gripping arm, which is arranged close to the gripping end and is located on a side of the first gripping arm facing the hand-held end, and includes a second connecting rod and a second gripping portion, and the second connecting rod is rotatably connected to the gripping rod, and the other end is rotatably connected to the first gripping portion, the first gripping portion includes a first gripping surface facing an object to be gripped, and a first flexible contact portion is arranged on the first gripping surface; and a second gripping arm, which is arranged close to the gripping end and is located on a side of the first gripping arm facing the hand-held end, and the second gripping arm includes a second connecting rod and a second gripping portion, and the second connecting rod One end of the third clamping arm is connected to the holding rod, and the other end is connected to the second clamping portion, the second clamping portion includes a second clamping surface facing away from the second connecting rod, and the second clamping surface is provided with a second flexible contact portion; an adjusting sleeve, the adjusting sleeve is sleeved on the circumferential outer side of the holding rod, and the adjusting sleeve can slide between the hand-held end and the second clamping arm; a third clamping arm, the third clamping arm is located on the side of the second clamping arm facing the hand-held end, the third clamping arm includes a third connecting rod and a third clamping portion, one end of the third connecting rod is rotatably connected to the adjusting sleeve, and the other end is rotatably connected to the third clamping portion, the third clamping portion includes a third clamping surface facing the object to be clamped, and the third flexible contact portion is provided on the third clamping surface.

[0007] In this way, the dental clamp provided by the present application can achieve clamping of the object to be clamped in three directions. By setting the first flexible contact part, the second flexible contact part and the third flexible contact part, flexible contact between the first clamping part and the object to be clamped, flexible contact between the second clamping part and the object to be clamped, and flexible contact between the third clamping part and the object to be clamped are achieved. The first flexible contact part has a certain plasticity, the second flexible contact part has a certain plasticity, and the third flexible contact part has a certain plasticity, so that the dental clamp can fit the surface of the object to be clamped, ensuring stability and firmness during the clamping process, which is facilitating further operations by the operator.

[0008] In some embodiments of the present application, the first flexible contact portion includes a plurality of first flexible contact portions, and the plurality of first flexible contact portions are arranged at intervals on the first clamping surface.

[0009] In some embodiments of the present application, the first flexible contact portion is formed as a silicone contact portion, or the first flexible contact portion is formed as a rubber contact portion, or the first flexible contact portion is formed as a polyurethane contact portion.

[0010] In some embodiments of the present application, the dental clamp also includes: a first auxiliary rod, the fixed end of the first auxiliary rod is connected to the holding rod, the free end of the first auxiliary rod extends toward the circumferential outside of the holding rod, one end of the first connecting rod is rotatably connected to the free end of the first auxiliary rod, and the other end is rotatably connected to the first clamping part.

[0011] In some embodiments of the present application, the first flexible contact portion is detachably connected to the first clamping portion.

[0012] In some embodiments of the present application, a first locking member is provided between the first connecting rod and the first clamping portion, and the first locking member can lock the first connecting rod and the first clamping portion.

[0013] In some embodiments of the present application, the dental holder further comprises: a sleeve screw, the adjusting sleeve is provided with a threaded hole adapted to the sleeve screw, the sleeve screw is passed through the threaded hole, and can abut against the holding rod.

[0014] In some embodiments of the present application, the dental holder further comprises: a hand-held portion, which is located outside the circumference of the adjusting sleeve.

[0015] In some embodiments of the present application, the dental clamp further includes: a limiting protrusion, which is arranged on the circumferential outer side of the holding rod and is located between the adjusting sleeve and the hand-held end. In the extension direction of the holding rod, the orthographic projection of the limiting protrusion is at least partially located outside the orthographic projection of the adjusting sleeve.

[0016] In some embodiments of the present application, the dental holder further comprises: a guide rail extending along the extension direction of the holding rod, and the adjusting sleeve is slidably matched with the guide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic diagram of a dental holder provided for some embodiments of the present application;

[0020] Figure 2 for Figure 1 A schematic diagram of a grip bar shown in ;

[0021] Figure 3 for Figure 1 Schematic diagram of the adjustment sleeve shown in .

[0022] Reference numerals:

[0023] 100. Dental holders;

[0024] 110, first clamping arm; 111, first connecting rod; 112, first clamping portion; 1121, first clamping surface; 1122, first flexible contact portion; 113, first auxiliary rod; 114, first locking member;

[0025] 120, second clamping arm; 121, second connecting rod; 122, second clamping portion; 1221, second clamping surface; 1122, second flexible contact portion;

[0026] 130, third clamping arm; 131, third connecting rod; 132, third clamping portion; 1321, third clamping surface; 1322, third flexible contact portion; 133, third auxiliary rod; 134, third locking member;

[0027] 140. Adjusting sleeve; 141. Hand-held part; 142. Sleeve screw;

[0028] 150, gripping rod; 151, clamping end; 152, hand-holding end. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0030] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. In addition, the directional terms mentioned in the embodiments of the present application, such as "inside", "outside", etc., are only references to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0032] In dental clinics and teaching, high-speed drills are often needed to perform fine shape preparation, grinding, polishing, and other operations on irregular small objects.

[0033] For example, crowns, post cores and other restorations need to be finely ground and polished; in teaching, ex vivo teeth or resin teeth need to be prepared into various cavity types and preparations; in some ex vivo tooth reprocessing, they need to be ground and cut. These operations require one hand to hold a small object and the other hand to grind and cut with a high-speed drill. The fingers that hold the object are easily cut and the gloves are easily torn, which is a problem that often troubles operators.

[0034] Due to the irregular shape of teeth, existing clamping tools (such as tweezers and pliers) cannot firmly clamp the teeth to facilitate operation.

[0035] In order to solve the above technical problems, the present application provides a dental holder 100, see Figure 1 , Figure 1 Schematic diagram of a dental clamp 100 provided in some embodiments of the present application; the dental clamp 100 may include: a gripping rod 150, a first clamping arm 110, a second clamping arm 120, an adjustment sleeve 140 and a third clamping arm 130.

[0036] For details, please refer to Figure 1 and Figure 2 , Figure 2 for Figure 1the holding rod 150 is formed into a rod shape, the holding rod 150 includes a clamping end 151 and a hand-held end 152 opposite to each other in its extending direction, the hand-held end 152 is used for an operator to hold the dental holder 100.

[0037] The first clamping arm 110 is arranged close to the clamping end 151, wherein "close" means that the distance between the first clamping arm 110 and the clamping end 151 is less than the distance between the first clamping arm 110 and the handheld end 152. Specifically, the distance between the first clamping arm 110 and the clamping end 151 may be zero. The first clamping arm 110 may include a first connecting rod 111 and a first clamping portion 112, one end of the first connecting rod 111 is rotatably connected to the gripping rod 150, and the other end is rotatably connected to the first clamping portion 112, the first clamping portion 112 includes a first clamping surface 1121 facing the object to be clamped, and a first flexible contact portion 1122 is provided on the first clamping surface 1121. When the first flexible contact portion 1122 abuts against the object to be clamped, the first flexible contact portion 1122 may be elastically deformed according to the shape of the object to be clamped, so that the first flexible contact portion 1122 may form a surface contact with the object to be clamped.

[0038] The second clamping arm 120 is arranged close to the clamping end 151, wherein "close" means that the distance between the second clamping arm 120 and the clamping end 151 is less than the distance between the second clamping arm 120 and the handheld end 152, and the second clamping arm 120 is located on the side of the first clamping arm 110 facing the handheld end 152, the second clamping arm 120 includes a second connecting rod 121 and a second clamping portion 122, one end of the second connecting rod is connected to the holding rod 150, and the other end is connected to the second clamping portion 122, the second clamping portion 122 includes a second clamping surface 1221 away from the second connecting rod 121, and a second flexible contact portion 1122 is provided on the second clamping surface 1221. When the second flexible contact portion 1122 abuts against the object to be clamped, the second flexible contact portion 1122 can be elastically deformed according to the shape of the object to be clamped, so that the second flexible contact portion 1122 can fit with the object to be clamped to form a surface contact.

[0039] See also Figure 1 and Figure 3 , Figure 3 for Figure 1The schematic diagram of the adjustment sleeve 140 shown in FIG. 1 is a schematic diagram of the adjustment sleeve 140; the adjustment sleeve 140 is sleeved on the outer side of the gripping rod 150 in the circumferential direction, and the adjustment sleeve 140 can slide between the hand-held end 152 and the second clamping arm 120. The third clamping arm 130 is located on the side of the second clamping arm 120 facing the hand-held end 152, and the third clamping arm 130 includes a third connecting rod 131 and a third clamping portion 132. One end of the third connecting rod 131 is rotatably connected to the adjustment sleeve 140, and the other end is rotatably connected to the third clamping portion 132. The third clamping portion 132 includes a third clamping surface 1321 facing the object to be clamped, and a third flexible contact portion 1322 is provided on the third clamping surface 1321. When the third flexible contact portion 1322 abuts against the object to be clamped, the third flexible contact portion 1322 can be elastically deformed according to the shape of the object to be clamped, so that the third flexible contact portion 1322 can form a surface contact with the object to be clamped.

[0040] It can be understood that the object to be clamped is located between the first clamping part 112, the second clamping part 122 and the third clamping part 132. In this way, by providing the first clamping arm 110, the second clamping arm 120 and the third clamping arm 130, the object to be clamped can be clamped in three directions, and by providing the first flexible contact part 1122, the second flexible contact part 1122 and the third flexible contact part 1322, the surface contact between the first clamping part 112, the second clamping part 122 and the third clamping part 132 and the object to be clamped can be achieved, thereby ensuring the stability of the dental clamp 100 in clamping the object to be clamped and preventing the object to be clamped from falling off.

[0041] It should be noted that the object to be clamped is generally of a special shape, and the first flexible contact portion 1122, the second flexible contact portion 1122 and the third flexible contact portion 1322 are provided to ensure the stability of the first clamping portion 112, the second clamping portion 122 and the third clamping portion 132 in clamping the object to be clamped.

[0042] Among them, a first locking member 114 is provided between the first connecting rod 111 and the first clamping part 112, and the first locking member 114 can lock the first connecting rod 111 and the first clamping part 112. Specifically, the first locking member 114 is a screw and a nut; the rotation between the first connecting rod 111 and the first clamping part 112 can be achieved through the cooperation of the screw and the nut, and the rotation and fixation between the first clamping part 112 and the first connecting rod 111 can be achieved by adjusting the tightness between the screw and the nut.

[0043] Furthermore, a third locking member 134 is provided between the third connecting rod 131 and the third clamping portion 132, and the third locking member 134 can lock the third connecting rod 131 and the third clamping portion 132. Specifically, the third locking member 134 is a screw and a nut, and the rotation and locking of the third connecting rod 131 and the third clamping portion 132 bracket are achieved by the cooperation of the screw and the nut.

[0044] In some embodiments of the present application, the first flexible contact portion 1122 may be formed as a silicone contact portion, the first flexible contact portion 1122 may also be formed as a rubber contact portion, or the first flexible contact portion 1122 may also be formed as a polyurethane contact portion.

[0045] Furthermore, the second flexible contact portion 1122 may be formed as a silicone contact portion, the second flexible contact portion 1122 may be formed as a rubber contact portion, or the second flexible contact portion 1122 may be formed as a polyurethane contact portion.

[0046] Further, the third flexible contact portion 1322 may be formed as a silicone contact portion, the third flexible contact portion 1322 may be formed as a rubber contact portion, or the third flexible contact portion 1322 may be formed as a polyurethane contact portion.

[0047] In some embodiments of the present application, the first flexible contact portion 1122 may include multiple first flexible contacts, which are spaced apart on the first clamping surface 1121. In a specific implementation, the number of the first flexible contact portions 1122 may be 2, 3, 4, 5, 6, etc.

[0048] Specifically, the first clamping portion 112 is formed in a "C" shape, the first connecting rod 111 is rotatably connected to the middle position of the first clamping portion 112, and first flexible contact portions 1122 are respectively provided at both ends of the first clamping portion 112. By setting two first flexible contact portions 1122, the stability of the surface contact between the first flexible contact portion 1122 and the object to be clamped is ensured.

[0049] In some embodiments of the present application, the second flexible contact portion 1122 may include multiple second flexible contacts, which are spaced apart on the second clamping surface 1221. In a specific implementation, the number of the second flexible contact portions 1122 may be 2, 3, 4, 5, 6, etc.

[0050] Specifically, the second clamping portion 122 is formed in a "C" shape, the second connecting rod 121 is rotatably connected to the middle position of the second clamping portion 122, and second flexible contact portions 1122 are respectively provided at both ends of the second clamping portion 122. By setting two second flexible contact portions 1122, the stability of the surface contact between the second flexible contact portion 1122 and the object to be clamped is ensured.

[0051] In some embodiments of the present application, the third flexible contact portion 1322 may include multiple third flexible contacts, which are spaced apart on the third clamping surface 1321. In a specific implementation, the number of the third flexible contact portions 1322 may be 2, 3, 4, 5, 6, etc.

[0052] Specifically, the third clamping portion 132 is formed in a "C" shape, the third connecting rod 131 is rotatably connected to the middle position of the third clamping portion 132, and third flexible contact portions 1322 are respectively provided at both ends of the third clamping portion 132. By setting two third flexible contact portions 1322, the stability of the surface contact between the third flexible contact portion 1322 and the object to be clamped is ensured.

[0053] In some embodiments of this application, please continue to refer to Figure 1 to Figure 2 The dental holder 100 may further include a first auxiliary rod 113, a fixed end of the first auxiliary rod 113 is connected to the gripping rod 150, a free end of the first auxiliary rod 113 extends toward the circumferential outer side of the gripping rod 150, one end of the first connecting rod 111 is rotationally connected to the free end of the first auxiliary rod 113, and the other end is rotationally connected to the first clamping portion 112. Thus, by providing the first auxiliary rod 113, the distance between the first clamping portion 112 and the gripping rod 150 can be increased, the rotation range of the first clamping portion 112 can be increased, and interference between the first clamping portion 112 and the gripping rod 150 during rotation can be avoided.

[0054] The rotational cooperation between the first auxiliary rod 113 and the first connecting rod 111 can be achieved by screw-nut cooperation, and the rotation and fixation between the first connecting rod 111 and the first auxiliary rod 113 can be achieved by adjusting the tightness between the screw and nut.

[0055] In some embodiments of this application, please continue to refer to Figure 1 and Figure 3 The dental holder 100 may further include a third auxiliary rod 133, a fixed end of the third auxiliary rod 133 is connected to the adjustment sleeve 140, a free end of the third auxiliary rod 133 extends toward the circumferential outer side of the adjustment sleeve 140, one end of the third connecting rod 131 is rotatably connected to the free end of the third auxiliary rod 133, and the other end is rotatably connected to the third clamping portion 132. Thus, by providing the third auxiliary rod 133, the distance between the third clamping portion 132 and the adjustment sleeve 140 can be increased, the rotation range of the third clamping portion 132 can be increased, and interference between the third clamping portion 132 and the adjustment sleeve 140 during the rotation process can be avoided.

[0056] The rotational cooperation between the third auxiliary rod 133 and the third connecting rod 131 can be achieved by screw-nut cooperation, and the rotation and fixation between the third connecting rod 131 and the third auxiliary rod 133 can be achieved by adjusting the tightness between the screw-nut.

[0057] In some embodiments of the present application, the first flexible contact portion 1122 is detachably connected to the first clamping portion 112. In this way, on the one hand, when the first flexible contact portion 1122 is damaged, it is convenient to replace the first flexible contact portion 1122. Further, the first flexible contact portion 1122 is replaceable. When the dental clamp 100 has clamped the first object to be clamped and needs to clamp the second object to be clamped, the first flexible contact portion 1122 can be replaced to ensure the hygienic effect during the clamping operation.

[0058] Specifically, the first flexible contact portion 1122 may be clamped with the first clamping portion 112 bracket, and the first flexible contact portion 1122 may also be threadedly connected with the first clamping portion 112 .

[0059] Furthermore, the second flexible contact portion 1122 and the second clamping portion 122 may be detachably connected.

[0060] Furthermore, the third flexible contact portion 1322 and the third clamping portion 132 may be detachably connected.

[0061] In some embodiments of the present application, the dental clamp 100 may further include a sleeve screw 142, and the adjusting sleeve 140 is provided with a threaded hole adapted to the sleeve screw 142, and the sleeve screw 142 is passed through the threaded hole and can abut against the holding rod 150. Thus, by tightening or loosening the sleeve screw 142, the sliding and fixing between the adjusting sleeve 140 and the holding rod 150 are achieved. Specifically, when the dental clamp 100 needs to clamp an object to be clamped, the position of the adjusting sleeve 140 can be adjusted to achieve the clamping of objects of different volumes by the dental clamp 100.

[0062] There may be multiple adjusting screws, and specifically, there may be 2, 3, 4, etc.

[0063] In a specific implementation process, there are two adjusting screws, and the two adjusting screws are arranged at intervals in the extending direction of the gripping rod 150. In this way, the stability of the fixing between the adjusting sleeve 140 and the gripping rod 150 can be ensured.

[0064] Furthermore, the dental holder 100 may further include a hand-held portion 141 , which is located on the circumferential outer side of the adjusting sleeve 140 , so as to facilitate an operator to adjust the position of the adjusting sleeve 140 .

[0065] In some embodiments of the present application, the dental holder 100 may further include a limiting protrusion, which is arranged on the circumferential outer side of the holding rod 150 and is located between the adjusting sleeve 140 and the hand-held end 152. In the extension direction of the holding rod 150, the orthographic projection of the limiting protrusion is at least partially located outside the orthographic projection of the adjusting sleeve 140, that is, the adjusting sleeve 140 cannot pass through the limiting protrusion, thereby preventing the adjusting sleeve 140 from falling off.

[0066] In some embodiments of the present application, the dental holder 100 may further include a guide rail extending along the extension direction of the gripping rod 150, and the adjusting sleeve 140 is slidably matched with the guide rail. The guide rail can further ensure the stability of the adjusting sleeve 140 during the sliding process.

[0067] In the specific implementation process of the present application, since the size of the object to be clamped is generally small, the first clamping surface 1121 is formed into a circle, and the diameter of the first clamping surface 1121 can be greater than or equal to 9 mm and less than or equal to 10 mm. The length of the first connecting rod 111 is greater than or equal to 4 mm and less than or equal to 5 mm, and the length of the first auxiliary rod 113 is greater than or equal to 14 mm and less than or equal to 15 mm.

[0068] The length of the second connecting rod 121 is greater than or equal to 9 mm and less than or equal to 10 mm, the second clamping surface 1221 is formed in a circular shape, and the diameter of the second clamping surface 1221 may be greater than or equal to 4 mm and less than or equal to 5 mm.

[0069] The third clamping surface 1321 is formed into a circle, and the diameter of the third clamping surface 1321 can be greater than or equal to 9 mm and less than or equal to 10 mm, the length of the third connecting rod 131 is greater than or equal to 4 mm and less than or equal to 5 mm, and the length of the third auxiliary rod 133 is greater than or equal to 14 mm and less than or equal to 15 mm.

[0070] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0071] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dental holder, characterized in that: include: A gripping rod, the gripping rod comprising a clamping end and a hand-holding end opposite to each other; a first clamping arm, the first clamping arm being arranged close to the clamping end, the first clamping arm comprising a first connecting rod and a first clamping portion, one end of the first connecting rod being rotatably connected to the holding rod, and the other end of the first connecting rod being rotatably connected to the first clamping portion, the first clamping portion comprising a first clamping surface facing the object to be clamped, and a first flexible contact portion being arranged on the first clamping surface; a second clamping arm, the second clamping arm being arranged close to the clamping end and being located on a side of the first clamping arm facing the handheld end, the second clamping arm comprising a second connecting rod and a second clamping portion, one end of the second connecting rod being connected to the holding rod, and the other end being connected to the second clamping portion, the second clamping portion comprising a second clamping surface facing away from the second connecting rod, and a second flexible contact portion being arranged on the second clamping surface; An adjusting sleeve, the adjusting sleeve being sleeved on the outer side of the holding rod in the circumferential direction, and the adjusting sleeve being able to slide between the hand-held end and the second clamping arm; The third clamping arm is located on the side of the second clamping arm facing the handheld end, the third clamping arm includes a third connecting rod and a third clamping portion, one end of the third connecting rod is rotatably connected to the adjusting sleeve, and the other end is rotatably connected to the third clamping portion, the third clamping portion includes a third clamping surface facing the object to be clamped, and a third flexible contact portion is provided on the third clamping surface.

2. The dental holder according to claim 1, characterized in that: The first flexible contact portions include a plurality of first flexible contact portions, and the plurality of first flexible contact portions are arranged at intervals on the first clamping surface.

3. The dental holder according to claim 1, characterized in that: The first flexible contact portion is formed as a silicone contact portion, or the first flexible contact portion is formed as a rubber contact portion, or the first flexible contact portion is formed as a polyurethane contact portion.

4. The dental holder according to claim 1, characterized in that: Also includes: A first auxiliary rod, wherein the fixed end of the first auxiliary rod is connected to the holding rod, the free end of the first auxiliary rod extends toward the circumferential outer side of the holding rod, one end of the first connecting rod is rotationally connected to the free end of the first auxiliary rod, and the other end is rotationally connected to the first clamping portion.

5. The dental holder according to claim 1, characterized in that: The first flexible contact portion is detachably connected to the first clamping portion.

6. The dental holder according to claim 1, characterized in that: A first locking member is provided between the first connecting rod and the first clamping portion, and the first locking member can lock the first connecting rod and the first clamping portion.

7. The dental holder according to claim 1, characterized in that: Also includes: A sleeve screw, wherein the adjusting sleeve is provided with a threaded hole adapted to the sleeve screw, the sleeve screw is passed through the threaded hole and can abut against the holding rod.

8. The dental holder according to claim 1, characterized in that: Also includes: A hand-held portion is located outside the circumference of the adjusting sleeve.

9. The dental holder according to claim 1, characterized in that: Also includes: A limiting protrusion is arranged on the circumferential outer side of the gripping rod and is located between the adjusting sleeve and the hand-held end. In the extending direction of the gripping rod, the orthographic projection of the limiting protrusion is at least partially located outside the orthographic projection of the adjusting sleeve.

10. The dental holder according to claim 1, characterized in that: Also includes: A guide rail extends along the extension direction of the holding rod, and the adjustment sleeve is slidably matched with the guide rail.

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