Expansion structure for carbon fiber rod and oral cavity CBCT head clamp

Abstract

The utility model provides an expansion structure for a carbon fiber rod and an oral cavity CBCT head clamp, and relates to the technical field of expansion fixing of the carbon fiber rod, the expansion structure comprises a base and the carbon fiber rod symmetrically arranged on the two sides of the top of the base, and further comprises an expansion sleeve and a locking assembly, the bottom of the carbon fiber rod is provided with an installation part used for being sleeved with the expansion sleeve, and the locking assembly is arranged between the installation part and the expansion sleeve and can drive the expansion sleeve to expand towards the outer side along the axis of the expansion sleeve to abut against the inner wall of the installation part so that the carbon fiber rod can be fixed in the radial direction. The carbon fiber rod can be axially and radially fixed through the arranged locking assembly, the situation that the carbon fiber rod shakes and loosens after being used for a long time and needs to be maintained regularly is avoided, and therefore the using stability and efficiency of the carbon fiber rod in equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon fiber rod expansion and fixing, in particular to an expansion structure for a carbon fiber rod and an oral CBCT head clamp. Background Art

[0002] Currently, CBCT has been widely used. In oral CBCT, a head clamp is often used to clamp and position the patient's head and assist in shooting. The head clamp usually needs to slide up and down along two carbon fiber rods to adjust the position so as to meet the needs of head clamping for patients of different heights.

[0003] Regarding the fixation of carbon fiber rods, the market usually only relies on bolts to fasten the carbon fiber rods in the axial direction, but there is no corresponding fixing measure for the radial direction. Therefore, after the head clamp has been used for a long time to slide up and down, the carbon fiber rod will shake left and right and become loose, so it needs regular maintenance and tightening, which is not convenient for long-term use. Utility Model Content

[0004] The utility model aims to solve the problem that the carbon fiber rod in the existing oral CBCT head clamp can only be fixed axially but not radially, and the carbon fiber rod is prone to shaking or loosening after long-term use.

[0005] In order to achieve the above-mentioned invention object, the utility model provides the following technical solutions:

[0006] An expansion structure for a carbon fiber rod comprises a base and carbon fiber rods symmetrically arranged on both sides of the top of the base, and further comprises:

[0007] An expansion sleeve, wherein the expansion sleeve is arranged on the top of the base, and a mounting portion for sleeve-mounting the expansion sleeve is arranged at the bottom of the carbon fiber rod; and

[0008] The locking assembly is arranged between the mounting portion and the expansion sleeve, and can drive the expansion sleeve to expand outward along its axis and abut against the inner wall of the mounting portion to achieve radial fixation of the carbon fiber rod.

[0009] As a preferred technical solution of the present application, the mounting portion includes a fixing rod which is arranged at the bottom of the carbon fiber rod and is integrally formed therewith.

[0010] As a preferred technical solution of the present application, the locking assembly includes an extrusion block slidably disposed inside the expansion sleeve and a screw threadedly disposed at the bottom of the base and extending into the extrusion block.

[0011] As a preferred technical solution of the present application, the locking assembly further includes a guide pin, and a through hole matching the guide pin is formed on the outside of the extrusion block.

[0012] As a preferred technical solution of the present application, a plurality of guide grooves are provided on the outer wall of the expansion sleeve and the fixed rod at equal intervals and are matched with the guide pins.

[0013] As a preferred technical solution of the present application, the outer diameter of the extrusion block is a frustum-shaped structure, and a screw hole is provided inside the extrusion block for matching with the screw.

[0014] As a preferred technical solution of the present application, the outer diameter of the expansion sleeve is a cylindrical structure, and a frustum-shaped slot is provided inside the expansion sleeve with the same shape as the extrusion block.

[0015] As a preferred technical solution of the present application, an installation hole for inserting the expansion sleeve is provided inside the base.

[0016] The present application also discloses an oral CBCT head clamp.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] When installing the carbon fiber rod on the head clamp, through the provided locking assembly, first insert the extrusion block into the expansion sleeve, then insert the expansion sleeve into the inner side of the installation part at the bottom of the carbon fiber rod, and then insert the installation part at the bottom of the carbon fiber rod into the installation hole on the base. At this time, screw the screw into the installation hole from the bottom of the base and continue to screw it into the extrusion block through the expansion sleeve. The extrusion block will move downward under the downward locking force of the screw. Therefore, during the downward movement of the frustum-shaped extrusion block, it will squeeze the inner wall of the expansion sleeve to make the expansion sleeve expand, so as to tightly squeeze the inner wall of the carbon fiber rod and lock and fix the carbon fiber rod radially. And the screw can also lock and fix the carbon fiber rod axially. Therefore, the stability of the carbon fiber rod can be improved, and the problem that the carbon fiber rod shakes and loosens after long-term use and requires positioning and maintenance in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an exploded structure diagram of the present utility model;

[0020] Figure 2 is a structure diagram of the expansion sleeve of the present utility model;

[0021] Figure 3 is a connection structure diagram of the expansion sleeve and the extrusion block of the present utility model;

[0022] Figure 4 is of the present utility model Figure 1 magnified structure diagram at A in

[0023] The labels in the figure are:

[0024] 10. Base; 110. Mounting hole; 20. Carbon fiber rod; 210. Fixed rod; 30. Expansion sleeve; 40. Extrusion block; 410. Through hole; 50. Screw; 60. Guide pin; 70. Guide groove. Detailed implementation manner

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present utility model.

[0026] As Figures 1 to 4 shown, the expansion structure for a carbon fiber rod proposed in this embodiment includes a base 10 and two carbon fiber rods 20, and the two carbon fiber rods 20 are symmetrically arranged on both sides of the top of the base 10. It also includes an expansion sleeve 30 and a locking assembly. The expansion sleeve 30 is arranged on the top of the base 10. The bottom of the carbon fiber rod 20 is provided with a mounting portion, and the mounting portion is used to sleeved the carbon fiber rod on which the expansion sleeve 30 is sleeved. The locking assembly is arranged between the mounting portion and the expansion sleeve 30, and can drive the expansion sleeve 30 to expand outward along its axis and abut against the inner wall of the mounting portion to realize radial fixation of the carbon fiber rod 20.

[0027] When it is necessary to install the carbon fiber rod 20 on the head clamp, first install the locking assembly into the expansion sleeve 30, then insert the expansion sleeve 30 with the locking assembly installed into the inner side of the mounting portion at the bottom of the carbon fiber rod 20, and then insert the mounting portion at the bottom of the carbon fiber rod 20 onto the base 10. Then, the set locking assembly can squeeze the expansion sleeve 30 to make the expansion sleeve 30 open, and the expanded expansion sleeve 30 will squeeze the inner wall of the mounting portion, so as to lock the carbon fiber rod 20 radially, prevent the carbon fiber rod 20 from shaking or loosening after long-term use and requiring regular maintenance, and improve the stability and use efficiency of the equipment. It should be noted that the installation and locking solutions of the present application are not limited to a scenario of fixing the carbon fiber rod 20 of the oral CBCT, and can also be extended and applied to the fixation of rod-shaped structures in other fields.

[0028] Specifically, as Figure 2 、 Figure 3 and Figure 4 shown, the locking assembly includes an extrusion block 40, a screw 50 and a guide pin 60. Among them, the extrusion block 40 is slidably arranged inside the expansion sleeve 30. The screw 50 is threadedly arranged at the bottom of the base 10 and extends into the inside of the extrusion block 40. A through hole 410 matching the guide pin 60 is opened outside the extrusion block 40, and the guide pin 60 is inserted into the through hole 410.

[0029] During the assembly process of the carbon fiber rod 20 and the base 10, the extrusion block 40 is inserted into the interior of the expansion sleeve 30, then the expansion sleeve 30 is inserted into the interior of the fixing rod 210, and finally the fixing rod 210 is inserted into the interior of the base 10. Then, the screw 50 is screwed in from the bottom of the base 10 and continues to be screwed into the interior of the extrusion block 40 through the interior of the expansion sleeve 30. At this time, the extrusion block 40 will move downward under the downward locking force of the screw 50. Therefore, the extrusion block 40 will extrude the inner wall of the expansion sleeve 30, causing the expansion sleeve 30 to expand outward along its circumferential direction. The radial tension of the expansion sleeve 30 acts on the inner wall of the carbon fiber rod 20, making the carbon fiber rod 20 tightly pressed by the expansion sleeve 30 and the inner wall of the mounting hole 110, which is firm and reliable, not easy to shake, facilitating the radial locking of the carbon fiber rod 20. Moreover, the screw 50 can also firmly fix the expansion sleeve 30 together with the carbon fiber rod 20, axially lock the carbon fiber rod 20, and thus improve the stability of the carbon fiber rod 20 during use.

[0030] Among them, the installation part is a fixing rod 210 with the same specification and material as the carbon fiber rod 20. The fixing rod 210 is arranged at the bottom of the carbon fiber rod 20, and the two are integrally formed by stamping. A number of equally spaced guiding grooves 70 are provided on the outer walls of both the expansion sleeve 30 and the fixing rod 210. The diameter of the guiding groove 70 is the same as the diameter of the guiding pin 60. Through the fixing rod 210 integrally formed at the bottom of the carbon fiber rod 20, it is convenient to install the carbon fiber rod 20 and the base 10. After the extrusion block 40 is inserted into the interior of the expansion sleeve 30, the guiding pin 60 is passed through the guiding groove 70 and continues to penetrate the through hole 410 on the extrusion block 40. Therefore, when the screw 50 drives the extrusion block 40 to move downward, the guiding pin 60 can prevent the extrusion block 40 from slipping in the expansion sleeve 30, weakening the locking force, and ensuring that the extrusion block 40 can move downward axially along the expansion sleeve 30, facilitating the stable locking of the carbon fiber rod 20.

[0031] In addition, a mounting hole 110 for inserting the expansion sleeve 30 is provided inside the base 10; the provided mounting hole 110 facilitates the installation and locking of the carbon fiber rod 20.

[0032] It should be noted that the outer diameter of the extrusion block 40 is a frustum-shaped structure, and a threaded hole matching the screw 50 is provided inside the extrusion block 40. The outer diameter of the expansion sleeve 30 is a cylindrical structure, and a frustum-shaped slot having the same shape as the extrusion block 40 is provided inside the expansion sleeve 30;

[0033] The cylindrical expansion sleeve 30 is convenient for inserting into the interior of the fixing rod 210. When the screw 50 drives the extrusion block 40 to move downward, the frustum-shaped extrusion block 40 can more quickly extrude the expansion sleeve 30, facilitating the stable expansion of the expansion sleeve 30.

[0034] The present application also discloses an oral CBCT head clamp, wherein the above-described expansion structure for the carbon fiber rod 20 is installed in the head clamp.

[0035] The working principle of the present utility model: When it is necessary to install the carbon fiber rod on the head clamp, first insert the extrusion block 40 into the inside of the expansion sleeve 30, then insert the expansion sleeve 30 into the inside of the fixing rod 210, finally insert the fixing rod 210 into the base 10, and then screw the screw 50 into the base 10 from the bottom and continue to screw it into the extrusion block 40 through the inside of the expansion sleeve 30. At this time, the extrusion block 40 will move downward under the downward locking force of the screw 50. Therefore, the extrusion block 40 will extrude the inner wall of the expansion sleeve 30, causing the expansion sleeve 30 to expand outward along its circumferential direction. The radial tension of the expansion sleeve 30 acts on the inner wall of the carbon fiber rod 20, so that the carbon fiber rod 20 is pressed tightly by the expansion sleeve 30 and the inner wall of the mounting hole 110, completing the installation of the carbon fiber rod 20, thus facilitating the radial locking of the carbon fiber rod 20. Moreover, the screw 50 can also fix the expansion sleeve 30 together with the carbon fiber rod 20 firmly, facilitating the axial locking of the carbon fiber rod 20, thereby improving the stability of the use of the carbon fiber rod 20, solving the problem that the carbon fiber rod 20 will shake left and right after the head clamp is used for long-term up and down sliding in the prior art, avoiding regular maintenance and fastening, and improving the use efficiency of the product.

[0036] The above embodiments are only used to illustrate the present utility model and do not limit the technical solutions described in the present utility model. Although this specification has described the present utility model in detail with reference to the above respective embodiments, the present utility model is not limited to the above specific embodiments. Therefore, any modification or equivalent replacement of the present utility model; and all technical solutions and their improvements that do not depart from the spirit and scope of the invention are covered by the scope of the claims of the present utility model.

Claims

1. An expansion structure for a carbon fiber rod, comprising a base (10) and carbon fiber rods (20) symmetrically arranged on both sides of the top of the base (10), characterized in that: Also includes: an expansion sleeve (30), the expansion sleeve (30) being arranged on the top of the base (10), and a mounting portion for sleeve-mounting the expansion sleeve (30) being arranged on the bottom of the carbon fiber rod (20); and A locking assembly is arranged between the mounting portion and the expansion sleeve (30), and can drive the expansion sleeve (30) to expand outward along its axis and abut against the inner wall of the mounting portion to achieve radial fixation of the carbon fiber rod (20).

2. The expansion structure for carbon fiber rods according to claim 1, characterized in that: The mounting portion comprises a fixing rod (210) which is arranged at the bottom of the carbon fiber rod (20) and is integrally formed therewith.

3. The expansion structure for carbon fiber rods according to claim 1, characterized in that: The locking assembly comprises an extrusion block (40) slidably disposed inside the expansion sleeve (30) and a screw (50) threadedly disposed at the bottom of the base (10) and extending into the interior of the extrusion block (40).

4. The expansion structure for carbon fiber rods according to claim 3, characterized in that: The locking assembly further comprises a guide pin (60), and a through hole (410) matching with the guide pin (60) is formed on the outside of the extrusion block (40).

5. The expansion structure for carbon fiber rods according to claim 4, characterized in that: The outer walls of the expansion sleeve (30) and the fixing rod (210) are both provided with a plurality of guide grooves (70) which are equidistantly distributed and match the guide pins (60).

6. The expansion structure for carbon fiber rods according to claim 5, characterized in that: The outer diameter of the extrusion block (40) is a truncated cone-shaped structure, and a screw hole matching the screw (50) is provided inside the extrusion block (40).

7. The expansion structure for carbon fiber rods according to claim 6, characterized in that: The expansion sleeve (30) has an outer diameter of a cylindrical structure, and a truncated cone-shaped slot having the same shape as the extrusion block (40) is provided inside the expansion sleeve (30).

8. The expansion structure for carbon fiber rods according to claim 1, characterized in that: The base (10) is provided with a mounting hole (110) for inserting the expansion sleeve (30).

9. Oral CBCT head clamp, characterized in that: The invention comprises an expansion structure for a carbon fiber rod according to any one of claims 1 to 8.

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