Connecting structure of ultrasonic knife force limiting assembly and inner sleeve

Abstract

The utility model relates to a connecting structure of an ultrasonic knife force limiting assembly and an inner sleeve. The connecting structure comprises a sleeve base, a sleeve clamping piece and the inner sleeve. Wherein the sleeve seat and the sleeve clamping piece jointly form a force limiting assembly of the ultrasonic knife; a limiting ring piece is annularly arranged on the outer side wall face of the rear end of the inner sleeve, and at least one limiting notch is formed in the limiting ring piece. An annular boss is annularly arranged on the inner side wall face of the front end of the sleeve base, a limiting boss corresponding to the limiting ring piece is arranged on the rear end face of the annular boss, and internal threads are further arranged on the inner side wall face of the rear end of the sleeve base. An external thread matched with the internal thread is arranged on the outer side wall surface of the sleeve clamping piece; wherein the inner sleeve penetrates in from the rear end of the sleeve seat and penetrates out from the front end of the sleeve seat, so that the limiting ring piece is attached to the annular boss, and the limiting boss is embedded in the limiting notch; the sleeve clamping piece penetrates from the rear end of the sleeve seat and is in threaded fit with the sleeve seat, and the small boss tightly presses the limiting ring piece. According to the utility model, the inner sleeve is completely fixed, so that the problems that the waveguide rod generates heat, the output frequency is increased and the like due to the contact between the force limiting assembly and the waveguide rod caused by the relative shaking of the inner sleeve and the force limiting assembly are solved.

Description

Technical Field

[0001] The utility model relates to the field of ultrasonic knife accessories, in particular to a connection structure between a force-limiting component of an ultrasonic knife and an inner sleeve. Background Art

[0002] In the ultrasonic knife project, the closing force required to drive the clamping head to close by holding and closing the handle is provided by the reaction force of a spring. The fixing of the spring and the provision of the initial pre-tightening force are achieved through a force-limiting component composed of two T-shaped rings that are screwed together relatively. At the same time, this force-limiting structure is connected to the inner sleeve so as to transmit the closing force to the clamping head via the inner sleeve. In previous projects, the force-limiting component was designed as a sleeve seat with a spring mounted on the outer side; a sleeve claw that is connected to the inner sleeve through a claw structure. The sleeve claw in the above structure is designed as a ring with an external thread, and the ring is evenly connected to form a claw-shaped structure by four small square columns with convex platforms on the inner side of the ends. The outer side of the inner sleeve connected to the sleeve claw in the above structure is designed as a square card slot structure. The inner sleeve and the sleeve claw in the above structure are connected by buckling and contacting through the above claw-shaped structure and the square card slot structure in the above structure. At the same time, the sleeve claw and the four claw-shaped structures share the same starting surface and include two small convex platforms, and correspondingly, two small grooves are opened on the inner sleeve. Positioning is achieved through the cooperation of the two small convex platforms and the grooves.

[0003] The stability of the claw in the above structure is somewhat lacking and it is prone to shaking during use. At the same time, the claw structure is relatively thin and there is a risk of breakage during installation.

[0004] In the detachable sleeve patent CN109431578B, a plastic part is injection-molded on each of the inner sleeve and the outer sleeve, and the claw structure of the sleeve claw is discarded and instead a convex platform is made on the sleeve claw to connect with a reserved groove on the plastic part of the inner sleeve. The stability of the sleeve claw in the above structure is greatly improved, but its design needs to be used in conjunction with a detachable structure knob. Content of the Utility Model

[0005] The purpose of the utility model is to provide a connection structure between a force-limiting component of an ultrasonic knife and an inner sleeve. This connection method can provide a more stable connection between the inner sleeve and the force-limiting component to avoid the relative shaking of the inner sleeve and the force-limiting component from contacting the waveguide rod, resulting in heat generation and an increase in the output frequency of the waveguide rod.

[0006] The utility model is realized through the following technical solutions: a connection structure between a force-limiting component of an ultrasonic knife and an inner sleeve, including a sleeve seat, a sleeve clamping part and an inner sleeve; wherein the sleeve seat and the sleeve clamping part together constitute the force-limiting component of the ultrasonic knife;

[0007] A limiting ring piece is annularly arranged on the outer side wall surface of the rear end of the inner sleeve, and at least one limiting notch is arranged on the limiting ring piece;

[0008] The inner wall surface at the front end of the sleeve seat is provided with an annular boss. A limiting boss corresponding to the limiting ring piece is provided on the rear end face of the annular boss. The inner wall surface at the rear end of the sleeve seat is also provided with an internal thread;

[0009] The outer wall surface of the sleeve clamping part is provided with an external thread that mates with the internal thread;

[0010] Among them, the inner sleeve passes through the rear end of the sleeve seat and exits from the front end, so that the limiting ring piece fits against the annular boss, and the limiting boss is embedded in the limiting notch; The sleeve clamping part passes through the rear end of the sleeve seat, and the sleeve clamping part is in threaded fit with the sleeve seat, and the small boss presses tightly against the limiting ring piece.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. The inner sleeve is completely fixed, and it will not cause the limiting component to contact the waveguide rod due to the relative shaking between the inner sleeve and the limiting component, thereby causing problems such as heat generation of the waveguide rod and increase in output frequency.

[0013] 2. Reduce the shaking of the inner sleeve. Even if the closing handle is not closed, the inner sleeve is still stable. Improve the doctor's operation experience.

[0014] 3. This installation method avoids the situation where the limiting component cannot be installed with the inner sleeve due to too small a gap between the waveguide rod and the inner sleeve, or the output is poor due to the limiting component contacting the waveguide rod after installation.

[0015] 4. This installation method can install inner sleeves of different sizes without changing the size of the sleeve clamping part.

[0016] 5. The design of the sleeve clamping part avoids the occurrence of part loss caused by the breakage of the traditional claw-shaped structure.

[0017] 6. The inner sleeve and the sleeve clamping part are easier to disassemble, avoiding part loss caused by deformation and breakage of the claw-shaped structure of the sleeve clamping part due to difficult disassembly. Description of the Drawings

[0018] Figure 1 is a schematic assembly structure diagram of the present utility model;

[0019] Figure 2 is a schematic structural diagram of the sleeve seat of the present utility model;

[0020] Figure 3 is Figure 2 a side sectional view of;

[0021] Figure 4 is a schematic structural diagram of the sleeve clamping part of the present utility model;

[0022] Figure 5 is a schematic diagram of the inner sleeve of the present utility model;

[0023] Figure 6 This is the side sectional view after the combination of the utility model;

[0024] Figure 7 Schematic diagram of the connection mode between the inner sleeve and the sleeve seat

[0025] Figure 8 Of the utility model Figure 7 Side sectional view.

[0026] 1 Force limiting component;

[0027] 2 Sleeve seat, 21 Internal thread, 22 Annular boss, 221 Inner side surface of the annular boss, 222 Rear end surface of the annular boss, 23 Limiting boss, 231 Side surface of the limiting boss;

[0028] 3 Sleeve clamping part, 31 External thread, 32 Small boss, 321 Front end surface of the boss;

[0029] 4 Inner sleeve, 41 Outer side wall surface, 42 Limiting ring piece, 421 Front side surface of the ring piece, 422 Rear side surface of the ring piece, 423 Limiting notch Specific implementation mode

[0030] The following is a detailed description of the utility model with reference to the accompanying drawings:

[0031] As Figures 1-6 Shown: A connection structure between an ultrasonic knife force limiting component and an inner sleeve, including a sleeve seat 2, a sleeve clamping part 3 and an inner sleeve 4; among them, the sleeve seat 2 and the sleeve clamping part 3 together constitute the force limiting component 1 of the ultrasonic knife;

[0032] The outer side wall surface 41 at the rear end of the inner sleeve 4 is provided with a limiting ring piece 42 in a circular shape, and at least one limiting notch 423 is provided on the limiting ring piece 42;

[0033] The inner side wall surface at the front end of the sleeve seat 2 is provided with an annular boss 22 in a circular shape, and a limiting boss 23 corresponding to the limiting ring piece 42 is provided on the rear end surface 222 of the annular boss 22 of the annular boss 22, and an internal thread 21 is further provided on the inner side wall surface at the rear end of the sleeve seat 2;

[0034] The outer side wall surface of the sleeve clamping part 3 is provided with an external thread 31 that cooperates with the internal thread 21;

[0035] Among them, the inner sleeve 4 passes through from the rear end of the sleeve seat 2 and out from the front end, so that the limiting ring piece 42 fits against the annular boss 22, and the limiting boss 23 is embedded in the limiting notch 423; the sleeve clamping part 3 passes through from the rear end of the sleeve seat 2, and the sleeve clamping part 3 is in threaded cooperation with the sleeve seat 2, and the small boss 32 presses tightly against the limiting ring piece 42.

[0036] In order to ensure that during the process of the rotary sleeve connector 3, the small boss 32 of the sleeve connector 3 abuts against the limiting boss 23, the limiting ring piece 42 has the same thickness as the limiting boss 23, so as to ensure that the rear side surface 422 of the ring piece of the limiting ring piece 42 is flush with the rear side surface of the limiting boss 23 of the limiting boss 23.

[0037] As Figure 6 shown: During the installation process, the inner sleeve 4 passes through the sleeve seat 2, and the internal thread 21 of the sleeve seat 2 is fixed in cooperation with the external thread 31 of the sleeve connector 3. The outer side wall surface 41 of the inner sleeve 4 contacts the inner side surface 221 of the annular boss of the annular boss 22 of the sleeve seat 2, the front side surface 421 of the ring piece of the limiting ring piece 42 contacts the rear end surface 222 of the annular boss of the annular boss 22 of the sleeve seat 2, and the rear side surface 422 of the ring piece of the limiting ring piece 42 contacts the front end surface 321 of the boss of the small boss 32. At this time, the front and rear directions of the inner sleeve 4 are respectively limited by the sleeve seat 2 and the sleeve connector 3. The periphery is limited by the inner side surface 221 of the annular boss of the annular boss 22.

[0038] As Figure 7 shown: Since the limiting boss 23 is embedded in the limiting notch 423. The limiting boss side surface 231 of the limiting boss 23 restricts the rotation of the inner sleeve 4.

[0039] The front end face of the sleeve connector 3 is annularly provided with a plurality of small bosses 32, and the contact surface of the small bosses is smaller than the entire large plane; under the action of force, there will be a certain amount of deformation, increasing the locking strength and ensuring that the entire structure is not easy to slip off.

[0040] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A connecting structure between an ultrasonic knife force limiting component and an inner sleeve, characterized in that: It includes a sleeve seat (2), a sleeve clamping member (3) and an inner sleeve (4); wherein, the sleeve seat (2) and the sleeve clamping member (3) together form a force limiting assembly (1) of an ultrasonic scalpel; An outer wall surface (41) at the rear end of the inner sleeve (4) is provided with a limiting ring piece (42) in a circular shape, and at least one limiting notch (423) is provided on the limiting ring piece (42); An inner wall surface at the front end of the sleeve seat (2) is provided with an annular boss (22) in a circular shape, a limiting boss (23) corresponding to the limiting ring piece (42) is provided on a rear end face (222) of the annular boss (22), and an internal thread (21) is further provided on an inner wall surface at the rear end of the sleeve seat (2); An outer wall surface of the sleeve clamping member (3) is provided with an external thread (31) that mates with the internal thread (21); Among them, the inner sleeve (4) penetrates through from the rear end of the sleeve seat (2) and exits from the front end, so that the limiting ring piece (42) fits against the annular boss (22), and the limiting boss (23) is embedded in the limiting notch (423); the sleeve clamping member (3) penetrates through from the rear end of the sleeve seat (2), and the sleeve clamping member (3) is in threaded fit with the sleeve seat (2), and the small boss (32) presses tightly against the limiting ring piece (42).

2. The connection structure between an ultrasonic scalpel force limiting component and an inner sleeve according to claim 1, characterized in that: The limiting ring piece (42) and the limiting boss (23) are of the same thickness.

3. The connecting structure between the ultrasonic knife force limiting component and the inner sleeve according to claim 1, characterized in that: A plurality of small bosses (32) are provided in a circular shape on a front end face of the sleeve clamping member (3).

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