Stirring curette

Abstract

The utility model provides a stirring curette, which relates to the technical field of medical instruments and comprises a curette body, a main rod, a holding sleeve and an outer locking sleeve, the curette body and the main rod are eccentrically arranged, the curette body and the main rod are collinear in rotation center line, the outer locking sleeve is sleeved on the holding sleeve in a sliding manner, the holding sleeve is matched with the main rod in a stopping manner through a stopping structure, and the outer locking sleeve is matched with the main rod. The outer locking sleeve moves in the axial direction of the holding sleeve so that the relative position of the holding sleeve and the main rod can be locked or unlocked. The distance between the curette body and the holding sleeve can be effectively adjusted, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a stirring scraper. Background Art

[0002] In recent years, with the development of technology, it has become an industry trend to use minimally invasive surgery for disc removal or intervertebral fusion device implantation, and the corresponding surgery is performed using small incisions or minimally invasive channels such as transforaminal mirrors. At present, traditional scrapers are mainly used clinically to remove some diseased tissues that need to be removed from human bones or soft tissues. The traditional scraper instrument structure that matches minimally invasive surgery is single. For example, patent CN209450604U provides a bone scraper structure including a handle, a connecting part, and a spoon body. The scraper can only be operated in one direction and cannot achieve an adjustable function. Since the head angle cannot be adjusted during use, the bone scraping range is small, and during operation, broken bones often accumulate, which greatly affects the bone scraping effect and efficiency of the scraper, increases the difficulty of the operator's operation, further affects the surgical effect, increases the patient's pain, and also increases the cost of the operation. Therefore, those skilled in the art have developed the following scraper with adjustable head angle: The utility model with patent authorization number CN214761326U is a new type of adjustable scraper, including a scraper head, a ball head inner rod, an eccentric shaft, an angle control assembly and a handle; wherein the angle control assembly includes a quick-change sleeve, a first spring, a steel ball, a tail cover, a second spring and an inner core; the proximal end of the ball head inner rod passes through the eccentric shaft, the tail cover, and the second spring in sequence, and then penetrates into the threaded portion of the inner core, and is fixedly connected to the proximal end of the inner core, and the proximal end of the scraper head is connected to the distal end of the ball head inner rod by a pin. The applicant has found that for affected areas of different depths, different forces are required for operation, and the adaptability is poor because the distance between the hand grip of the device and the scraper head is always the same. Utility Model Content

[0003] The utility model aims to provide a stirring scraper to solve the technical problem of poor adaptability in the prior art.

[0004] In order to solve the above problems, a stirring scraper involved in the utility model adopts the following technical solutions:

[0005] The utility model provides a stirring scraper, comprising a scraper body, a main rod, a holding sleeve and an outer locking sleeve. The scraper body and the main rod are eccentrically arranged, and the rotation center lines of the scraper body and the main rod are colinear. The outer locking sleeve is slidably sleeved on the holding sleeve, and the holding sleeve is matched with the main rod through a stopping structure. The outer locking sleeve can lock or unlock the relative position of the holding sleeve and the main rod by moving along the axial direction of the holding sleeve.

[0006] Preferably, the stopping structure includes an annular groove recessed along the circumferential wall of the main rod, a channel passing through the inside and outside of the holding sleeve, a ball arranged in the channel, and a functional section opened along the circumferential direction of the inner circumferential wall of the outer locking sleeve. The functional section includes a narrow diameter section, a transition section, and a wide diameter section which are axially connected in sequence along the inner wall of the locking sleeve. During the axial movement of the outer locking sleeve relative to the holding sleeve, the channel can correspond to the narrow diameter section, the transition section, and the wide diameter section in sequence. Under the locking condition, the ball respectively resists the slide groove and the narrow diameter section, and the narrow diameter section restricts the ball from sliding out of the slide groove. Under the unlocking condition, the inner wall of the annular groove pushes the ball to move into the wide diameter section, causing the ball to disengage from the slide groove.

[0007] Preferably, it also includes a compression spring, which is sleeved on the holding sleeve, and the two ends of the compression spring are respectively against the outer locking sleeve and the holding sleeve. When the outer locking sleeve moves from the relative direction of the slide groove and the narrow diameter section to the relative direction of the slide groove and the wide diameter section, the outer locking sleeve and the holding sleeve can cooperate to squeeze the compression spring to contract.

[0008] Preferably, a limiting structure is also included, which includes a first limiting portion arranged on the outer locking sleeve and a second limiting portion arranged on the holding sleeve. During the bidirectional movement of the limiting structure, the first limiting portion and the second limiting portion can be offset to limit the movement range of the outer locking sleeve on the holding sleeve.

[0009] Preferably, the holding sleeve comprises an inner locking sleeve, a rear sliding sleeve and a handle sleeve, the inner locking sleeve and the rear sliding sleeve are respectively slidably mounted on the main rod, and the two ends of the handle sleeve are respectively mounted on the inner locking sleeve and the rear sliding sleeve.

[0010] Preferably, a plurality of annular grooves are arranged at intervals along the axial direction of the main rod.

[0011] Preferably, it also includes a horizontal handle and a rocking handle, the main rod is vertically connected to the middle of the horizontal handle, and the rocking handle is vertically connected to one end of the horizontal handle.

[0012] The beneficial effects of the utility model are as follows:

[0013] The utility model provides a stirring scraper, comprising a scraper body, a main rod, a holding sleeve and an outer locking sleeve, wherein the scraper body and the main rod are eccentrically arranged, the scraper body and the main rod rotation center line are colinear, the outer locking sleeve is slidably sleeved on the holding sleeve, the holding sleeve is matched with the main rod through a stop structure, and the outer locking sleeve can lock or unlock the relative position of the holding sleeve and the main rod by moving along the axial direction of the holding sleeve. The device can adjust the distance between the scraper body and the holding sleeve as needed, facilitates intraoperative operation, and can achieve stirring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following is a brief introduction to the drawings required for use in the embodiment:

[0015] Figure 1A schematic diagram of the structure of a stirring scraper;

[0016] Figure 2 for Figure 1 Schematic diagram of the local structure;

[0017] Figure 3 An exploded view of a stirring scraper;

[0018] Figure 4 It is a schematic diagram of the structure of the inner locking sleeve.

[0019] Explanation of the accompanying reference numerals: 1. scraper body; 2. main rod; 3. outer locking sleeve; 4. annular groove; 5. channel; 6. ball; 7. narrow diameter section; 8. transition section; 9. wide diameter section; 10. horizontal handle; 11. crank handle; 12. inner locking sleeve; 13. rear sliding sleeve; 14. handle. DETAILED DESCRIPTION

[0020] In order to make the technical purpose, technical solution and beneficial effects of the present utility model clearer, the technical solution of the present utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] The utility model provides a stirring scraper, as shown in the figure, comprising a scraper body 1, a main rod 2, a holding sleeve, an outer locking sleeve 3, and a handle. The scraper body 1 is eccentrically arranged with one end of the main rod 2, the rotation center line of the scraper body 1 is colinear with the rotation center line of the main rod 2, the handle is connected to the other end of the main rod 2, the holding sleeve is slidably sleeved on the main rod 2, and the holding sleeve and the main rod 2 are rotatably matched, the holding sleeve is axially stopped with the main rod 2 through a stopping structure, so that the holding sleeve limits the main rod 2 from sliding relative to it through the stopping structure, and can always maintain the relative circumferential rotation of the holding sleeve and the main rod 2, the outer locking sleeve 3 is slidably sleeved on the holding sleeve, the outer locking sleeve 3 can lock or unlock the relative position of the holding sleeve and the main rod 2 by axial bidirectional movement of the holding sleeve, the outer locking sleeve 3 is limitedly matched with the holding sleeve, so that the bidirectional movement of the outer locking sleeve 3 is always maintained on the holding sleeve, and a plurality of annular grooves 4 are arranged at intervals along the axial direction of the main rod 2.

[0022] The handle comprises a horizontal handle 10 and a crank handle 11 . The main rod 2 is vertically connected to the middle of the horizontal handle 10 , and the crank handle 11 is vertically connected to one end of the horizontal handle 10 .

[0023] The stopping structure includes an open annular groove 4 extending circumferentially along the peripheral wall of the main rod 2 and connected end to end, a channel 5 connecting the inner cavity of the holding sleeve and the outside, a ball 6 rolling in the channel 5, and a functional section axially opened along the inner cavity peripheral wall of the outer locking sleeve 3. The functional section includes a narrow diameter section 7, a transition section 8, and a wide diameter section 9 axially connected in sequence along the inner wall of the locking sleeve. The inner diameter of the narrow diameter section 7 is smaller than the inner diameter of the wide diameter section 9. The transition section 8 is a variable diameter structure with a diameter gradually increasing from the diameter of the narrow diameter section 7 to the diameter of the wide diameter section 9. When the outer locking sleeve 3 moves axially relative to the holding sleeve to unlock, the channel 5 can correspond to the narrow diameter section 7, the transition section 8 and the wide diameter section 9 in sequence.

[0024] Specifically, the ball 6 is interpolated into the slide groove through the channel 5 (that is, part of the section of the ball 6 is located in the channel 5, and part of the section of the ball 6 is located in the slide groove). When the blocking structure is locked, the ball 6 is abutted against the inner wall of the narrow diameter section 7, and the main rod 2 tends to move axially under force. The inner wall of the slide groove abuts against the ball 6 and pushes the ball 6 to move toward the inner wall of the narrow diameter section 7. The inner wall of the narrow diameter section 7 abuts against the ball 6 so that it cannot escape from the slide groove to prevent the main rod 2 from sliding relative to the holding sleeve. When the blocking structure is unlocked, the wide diameter section 9 is connected with the channel 5, and the main rod 2 is forced to move axially. The inner wall of the slide groove abuts against the ball 6 and pushes the ball 6 to move toward the inner wall of the wide diameter section 9. The ball 6 escapes from the slide groove to allow the main rod 2 and the holding sleeve to slide relative to each other. The relative position of the main rod 2 and the holding sleeve is positioned by adjusting the ball 6 to correspond to different annular grooves 4 on the main rod 2.

[0025] Since the holding sleeve is used for hand-held operation, the larger the contact area between the inner wall of the holding sleeve and the outer wall of the main rod 2, the greater the friction. However, directly reducing the size of the holding sleeve will cause inconvenience in hand holding. To solve this problem, the holding sleeve includes an inner locking sleeve 12, a rear sliding sleeve 13 and a handle sleeve 14. The handle sleeve 14 is used for hand holding. The inner locking sleeve 12 and the rear sliding sleeve 13 are respectively slidably mounted on the main rod 2. The two ends of the handle sleeve 14 are respectively mounted on the inner locking sleeve 12 and the rear sliding sleeve 13, that is, the inner locking sleeve 12 and the rear sliding sleeve 13 are both located between the main rod 2 and the handle sleeve 14, thereby reducing the contact area between the holding sleeve and the main rod 2.

[0026] Furthermore, the channel 5 is opened on the inner locking sleeve 12. In order to ensure that the outer locking sleeve 3 is always locked with the stopping structure when not subjected to external force, the device also includes a compression spring and a limiting structure. The limiting structure includes a first limiting portion arranged on the outer locking sleeve 3 and a second limiting portion arranged on the holding sleeve. The second limiting portion includes a second limiting surface and a third limiting surface arranged on the peripheral wall of the holding sleeve along the axial direction of the holding sleeve. The first limiting portion is located between the second limiting surface and the third limiting surface. During the bidirectional movement of the limiting structure, the first limiting portion can be offset against the second limiting surface or the third limiting surface to limit the outer locking sleeve 3 to be within the moving range on the holding sleeve.

[0027] The compression spring sleeve is arranged on the holding sleeve, and the two ends of the compression spring are respectively against the outer locking sleeve 3 and the holding sleeve. During the movement of the outer locking sleeve 3 from the relative direction of the slide groove and the narrow diameter section 7 to the relative direction of the slide groove and the wide diameter section 9, the outer locking sleeve 3 and the holding sleeve can cooperate to squeeze the compression spring to contract, and the compression spring restores the deformation to enable the outer locking sleeve 3 to move from the relative direction of the slide groove and the wide diameter section 9 to the relative direction of the slide groove and the narrow diameter section 7. Further, the compression spring is located between the limiting surface of the first limiting portion and the second limiting portion away from the channel 5 side.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate but not to limit the technical solutions of the present invention, and any equivalent substitutions of the present invention and any modifications or partial substitutions that do not depart from the spirit and scope of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A stirring scraper, characterized in that: It includes a scraper body, a main rod, a holding sleeve and an outer locking sleeve. The scraper body and the main rod are eccentrically arranged, the rotation center line of the scraper body and the rotation center line of the main rod are colinear, the holding sleeve is slidably sleeved on the main rod, the holding sleeve and the main rod are rotationally matched, the holding sleeve is axially blocked with the main rod through a blocking structure, the outer locking sleeve is slidably sleeved on the holding sleeve, and the outer locking sleeve can lock or unlock the relative position of the holding sleeve and the main rod by moving bidirectionally along the axial direction of the holding sleeve.

2. A stirring scraper according to claim 1, characterized in that: The stopping structure includes an annular groove recessed along the circumferential wall of the main rod, a channel penetrating the inside and outside of the holding sleeve, a ball arranged in the channel, and a functional section opened along the circumferential direction of the inner circumferential wall of the outer locking sleeve. The functional section includes a narrow diameter section, a transition section, and a wide diameter section axially connected in sequence along the inner wall of the locking sleeve. During the axial movement of the outer locking sleeve relative to the holding sleeve, the channel can correspond to the narrow diameter section, the transition section, and the wide diameter section in sequence. Under the locking condition, the ball respectively resists the slide groove and the narrow diameter section, and the narrow diameter section restricts the ball from sliding out of the slide groove. Under the unlocking condition, the inner wall of the annular groove pushes the ball to move into the wide diameter section, causing the ball to disengage from the slide groove.

3. A stirring scraper according to claim 2, characterized in that: It also includes a compression spring, which is sleeved on the holding sleeve. The two ends of the compression spring are respectively against the outer locking sleeve and the holding sleeve. During the movement of the outer locking sleeve from the relative direction of the sliding groove and the narrow diameter section to the relative direction of the sliding groove and the wide diameter section, the outer locking sleeve and the holding sleeve can cooperate to squeeze the compression spring to contract.

4. A stirring scraper according to claim 3, characterized in that: It also includes a limiting structure, which includes a first limiting portion arranged on the outer locking sleeve and a second limiting portion arranged on the holding sleeve. During the bidirectional movement of the limiting structure, the first limiting portion and the second limiting portion can be offset to limit the movement range of the outer locking sleeve on the holding sleeve.

5. A stirring scraper according to claim 4, characterized in that: The holding sleeve comprises an inner locking sleeve, a rear sliding sleeve and a handle sleeve. The inner locking sleeve and the rear sliding sleeve are respectively slidably sleeved on the main rod, and the two ends of the handle sleeve are respectively sleeved on the inner locking sleeve and the rear sliding sleeve.

6. A stirring scraper according to claim 2, characterized in that: A plurality of annular grooves are arranged at intervals along the axial direction of the main rod.

7. The stirring scraper according to claim 1, characterized in that: The utility model also comprises a horizontal handle and a rocking handle. The main rod is vertically connected to the middle part of the horizontal handle, and the rocking handle is vertically connected to one end of the horizontal handle.

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