Forceps head action mechanism of sampling forceps

Abstract

The utility model discloses a forceps head actuating mechanism of sampling forceps. The forceps head actuating mechanism comprises a fixed handle and an outer sleeve, the outer sleeve is fixedly connected to the fixed handle through the rubber coating body; wherein the rubber coating body is fixedly connected with the tail end portion of the outer sleeve in a sleeved mode, a positioning mechanism is arranged between the rubber coating body and the fixed handle, and the positioning mechanism is suitable for limiting the axial position of the rubber coating body in the axial direction of the outer sleeve and / or the circumferential position of the rubber coating body in the circumferential direction of the outer sleeve relative to the fixed handle. It can be ensured that the outer sleeve and the fixed handle are firmly limited and fixed together, and the position precision of connection of the outer sleeve and the fixed handle is ensured.

Description

Technical Field

[0001] The utility model relates to a clamping head action mechanism of a sampling forceps, belonging to the technical field of medical devices. Background Art

[0002] At present, a sampling forceps is a device for sampling target tissues. It generally includes a fixed handle, a movable handle and a clamping head. The clamping head includes an upper clamping head and a lower clamping head hinged together. The lower clamping head is fixed on an outer sleeve, and the outer sleeve is fixed on the fixed handle. The movable handle is connected to the upper clamping head through a pull rod. The movable handle is hinged on the fixed handle. By operating the movable handle, the upper clamping head is pulled through the pull rod, and the upper clamping head and the lower clamping head are closed and opened to sample tissues. The Chinese patent with the publication number CN219048640U discloses a disposable cervical biopsy forceps. The outer tube is fixed on the housing of the sampling forceps. Generally, the outer tube is fixed on the housing of the sampling forceps by rubber coating. If a positioning mechanism is not provided, the positioning of the outer tube and the fixed handle is inaccurate, and the assembly is very inconvenient. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a clamping head action mechanism of a sampling forceps, which can ensure that the outer sleeve and the fixed handle are firmly limited and fixed together, and ensure the position accuracy of the connection between the outer sleeve and the fixed handle.

[0004] To solve the above technical problem, the technical solution of the utility model is: a clamping head action mechanism of a sampling forceps, comprising:

[0005] A fixed handle;

[0006] An outer sleeve, the outer sleeve is fixedly connected to the fixed handle through a rubber coating body; wherein,

[0007] The rubber coating body fixedly sleeved on the tail end of the outer sleeve, and a positioning mechanism is arranged between the rubber coating body and the fixed handle. The positioning mechanism is adapted to limit the axial position of the rubber coating body relative to the fixed handle in the axial direction of the outer sleeve and / or the circumferential position in the circumferential direction of the outer sleeve.

[0008] Further, the positioning mechanism includes at least one axial positioning mechanism for limiting the axial position of the rubber coating body relative to the fixed handle in the axial direction of the outer sleeve. The axial positioning mechanism includes:

[0009] An axial limit slot, the axial limit slot is arranged on one of the rubber coating body and the fixed handle;

[0010] An axial positioning block, the axial positioning block is arranged on the other of the rubber coating body and the fixed handle; the axial positioning block is clamped with the axial limit slot.

[0011] Further, the positioning mechanism further includes at least one circumferential rotation positioning mechanism for defining the circumferential position of the encapsulating body relative to the fixed handle on the outer sleeve. The circumferential rotation positioning mechanism includes:

[0012] A wall abutment provided on the outer wall of the axial positioning block;

[0013] A mating wall abutment provided on the fixed handle, and the mating wall abutment abuts against the wall abutment.

[0014] Further, the positioning mechanism includes at least one circumferential rotation positioning mechanism for defining the circumferential position of the encapsulating body on the fixed handle along the outer sleeve. The circumferential rotation positioning mechanism includes:

[0015] A rotation limit card slot, which is provided on one of the encapsulating body and the fixed handle;

[0016] A rotation positioning block, which is provided on the other of the encapsulating body and the fixed handle; the rotation positioning block is engaged with the rotation limit card slot.

[0017] Further, the sampling forceps jaw operating mechanism further includes a movable handle and a pull rod. The movable handle is hinged to the fixed handle, and the tail of the movable handle is movably connected to the pull rod.

[0018] Further, a torsion spring for resetting the movable handle after firing is provided between the movable handle and the fixed handle.

[0019] Further, to facilitate the connection between the movable handle and the pull rod, a connection block is hinged to the tail of the pull rod, and a clamping slot with an opening is provided on the connection block;

[0020] A plugging slot is provided on the movable handle, and a clamping block is provided in the plugging slot of the movable handle. The connection block is inserted into the plugging slot, so that the clamping block is snapped into the clamping slot, and the clamping block has a degree of freedom of movement in the clamping slot.

[0021] Further, to avoid movement interference of the connection block during movement, the end of the connection block in the width direction is located in the plugging slot.

[0022] Further, to facilitate assembly and movement of the pull rod, the clamping block includes a clamping body part and a clamping end part with a width greater than that of the clamping body part. The clamping slot includes an outer clamping slot for clamping the clamping body part and an inner clamping slot for clamping the clamping end part. The structure between the clamping body part and the outer clamping slot and between the clamping end part and the inner clamping slot is configured as follows:

[0023] The outer clamping slot has a structure that is larger at the top and bottom and smaller at the top in the width direction;

[0024] and / or the length of the clamping end portion in the up-and-down direction is less than the length of the inner clamping groove in the up-and-down direction.

[0025] Furthermore, the fixed handle includes an upper cover and a lower cover that are butted together;

[0026] Or the fixed handle includes an upper cover portion and a handle body portion integrally formed, and the upper cover portion is slidably disposed at the tail on the upper side of the handle body portion.

[0027] After adopting the above technical solutions, the utility model has the following beneficial effects:

[0028] 1. The utility model is coated with rubber on the outer sleeve and is provided with a coated body. Since a ring is provided on the outer wall of the outer sleeve corresponding to the coated body, the ring ensures that the coated body can be firmly limited and fixed both axially and circumferentially;

[0029] 2. An axial positioning block and a rotation positioning block are provided on the coated body, and an axial limit clamping groove and a rotation limit clamping groove are respectively provided on the fixed handle to ensure the position accuracy of the clamping head, the outer sleeve tube and the fixed handle;

[0030] 3. A positioning hole and a positioning post are respectively provided on the upper cover and the lower cover of the fixed handle to ensure that the welding wire will not be misaligned or deviated during ultrasonic welding;

[0031] 4. The movable handle and the fixed handle are connected by a pin and are equipped with a torsion spring to ensure that it can be quickly reset after striking and cutting tissues;

[0032] 5. The end portion of the connecting block in the width direction is located in the insertion slot, avoiding the phenomenon of jamming and interference of the connecting block when the connecting rod moves; in addition, the outer clamping groove is a structure with a larger upper and lower size in the width direction and the length of the clamping end portion in the up-and-down direction is less than the length of the inner clamping groove in the up-and-down direction. The above design facilitates the rapid assembly of the connecting block.

[0033] 6. By providing corresponding clamping body portions and outer clamping grooves as well as clamping end portions and inner clamping grooves, it is ensured that the connecting block will not slip off after being assembled to the movable handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a perspective view of the clamping head action mechanism of the sampling forceps of the utility model;

[0035] Figure 2 is an internal schematic view of the clamping head action mechanism of the sampling forceps of the utility model;

[0036] Figure 3 is a perspective view of the outer sleeve tube of the utility model;

[0037] Figure 4Isometric view of the encapsulating body of the present utility model;

[0038] Figure 5 Isometric view of the fixed handle of the present utility model;

[0039] Figure 6 Connection schematic diagram of the connecting block and the insertion slot of the present utility model;

[0040] Figure 7 Isometric view of the sampling forceps jaw operating mechanism of another structure of the present utility model. Detailed implementation manners

[0041] In order to make the content of the present utility model easier to be clearly understood, the present utility model will be further described in detail below according to specific embodiments in conjunction with the drawings.

[0042] Embodiment 1

[0043] As Figures 1 to 6 shown, a sampling forceps jaw operating mechanism includes:

[0044] Fixed handle 1;

[0045] Outer sleeve 2, the outer sleeve 2 is fixedly connected to the fixed handle 1 through the encapsulating body 3; wherein,

[0046] The encapsulating body 3 fixedly sleeved on the tail end of the outer sleeve 2, a positioning mechanism is provided between the encapsulating body 3 and the fixed handle 1, and the positioning mechanism is adapted to limit the axial position of the encapsulating body 3 relative to the fixed handle 1 in the axial direction of the outer sleeve 2 and the circumferential position in the circumferential direction of the outer sleeve 2.

[0047] In this embodiment, the positioning mechanism includes two axial positioning mechanisms for limiting the axial position of the encapsulating body 3 relative to the fixed handle 1 in the axial direction of the outer sleeve 2. Of course, the number of the axial positioning mechanisms can be set according to needs, and the specific structure of the axial positioning mechanism can be as follows, including:

[0048] Axial limit card slot 11, the axial limit card slot 11 is arranged on the fixed handle 1;

[0049] Axial positioning block 31, the axial positioning block 31 is arranged on the encapsulating body 3, and the axial positioning block 31 is clamped with the axial limit card slot 11.

[0050] In this embodiment, as Figure 3 shown, the outer sleeve 2 is provided with two rings 21 on the outer wall connecting the encapsulating body 3. The number of the rings 21 can be specifically set according to needs. The rings 21 in this embodiment can be integral rings or non-integral rings. Through the setting of the rings 21, it is ensured that the encapsulating body 3 can be firmly limited and fixed both axially and circumferentially.

[0051] In this embodiment, asFigure 2 , 4 As shown in 4 , the positioning mechanism includes two circumferentially rotating positioning mechanisms arranged symmetrically. The circumferentially rotating positioning mechanism is used to define the circumferential position of the encapsulating body 3 relative to the fixed handle 1 in the circumferential direction of the outer sleeve 2. The specific structure of the circumferentially rotating positioning mechanism can be as follows: including:

[0052] A rotating limit card slot 12, which is arranged on the fixed handle 1;

[0053] A rotating positioning block 32, which is arranged on the encapsulating body 3 and is clamped with the rotating limit card slot 12.

[0054] In this embodiment, by providing an axial positioning block 31 and a rotating positioning block 32 on the encapsulating body 3, and respectively providing an axial limit card slot 11 and a rotating limit card slot 12 on the fixed handle 1, the position accuracy of the pliers head, the outer sleeve 2 and the fixed handle 1 is ensured.

[0055] Specifically, as Figure 1 shown, the action mechanism of the sampling pliers head further includes a movable handle 4 and a pull rod 5. The movable handle 4 is hinged to the fixed handle 1 through a pin, and the tails of the movable handle 4 and the pull rod 5 are movably connected.

[0056] In this embodiment, the sampling pliers include a pliers head, and the pliers head includes an upper pliers head and a lower pliers head hinged together. The tail of the lower pliers head is fixedly connected to the head of the outer sleeve 2, the tail of the upper pliers head is hinged to the pull rod 5, and the pull rod 5 passes through the outer sleeve 2 and is movably connected to the movable handle 4.

[0057] By firing the movable handle 4, the pull rod 5 can be pulled, thereby driving the upper pliers head to swing, so as to open or close the pliers head and cut the target component.

[0058] Specifically, as Figure 2 shown, a torsion spring 6 for resetting the movable handle 4 after firing is provided between the movable handle 4 and the fixed handle 1.

[0059] Specifically, as Figure 2 , 6 shown, the tail of the pull rod 5 is hinged with a connecting block 7 through a riveting pin, and a clamping groove 71 with an opening is provided on the connecting block 7;

[0060] A plugging groove is provided on the movable handle 4, a clamping block 41 is provided in the plugging groove of the movable handle 4, the connecting block 7 is inserted into the plugging groove, so that the clamping block 41 is clamped into the clamping groove 71 from the opening, and the clamping block 41 has a degree of freedom of movement in the clamping groove 71.

[0061] As Figure 6 shown, the connecting block 7 is in the width direction (that is Figure 6The end portions in the left - right direction (in the figure) are located within the insertion slots, so as to avoid interference and jamming of the connecting block 7 during the process that the moving handle 4 drives the pull rod 5 to move when firing.

[0062] As Figure 6 shown, the clamping block 41 includes a clamping body part 41a and a clamping end part 41b with a width greater than that of the clamping body part 41a. The clamping slot 71 includes an outer clamping slot 71a for clamping with the clamping body part 41a and an inner clamping slot 71b for clamping with the clamping end part 41b. The structures between the clamping body part 41a and the outer clamping slot 71a and between the clamping end part 41b and the inner clamping slot 71b are configured as follows:

[0063] The outer clamping slot 71a has a structure that is larger at the upper and lower parts in the width direction and smaller at the upper part, which is beneficial for the clamping block 41 to enter the clamping slot 71;

[0064] The length of the clamping end part 41b in the up - down direction is less than the length of the inner clamping slot 71b in the up - down direction.

[0065] In this embodiment, as Figure 1 、 2 shown, the fixed handle 1 is a split type, including an upper cover 10 and a lower cover 20 that are butted together. The upper cover 10 and the lower cover 20 are ultrasonically welded. Matching positioning holes and positioning posts can be respectively provided between the upper cover 10 and the lower cover 20 to ensure that the welding lines will not be misaligned or deviated during ultrasonic welding.

[0066] Embodiment Two

[0067] The structure of this embodiment is basically the same as that of Embodiment One. The difference is that: as Figure 7 shown, the fixed handle 1 includes an upper cover part 30 and a handle body part 40 formed integrally. The upper cover part 30 is slidably arranged at the tail part on the upper side of the handle body part 40.

[0068] Specifically, a guide rail and chute mechanism is provided between the end part of the upper cover part 30 and the handle body part 40. The upper cover part 30 can be pushed into the handle body part 40 through the guide rail and chute mechanism to complete the installation. At the same time, designing the guide rail and chute mechanism is to facilitate the operation space during the riveting of the connecting block 7 and the pull rod 5. After the riveting pin is installed, the upper cover part 30 can be assembled to make the appearance more perfect; in addition, since the handle body part 40 is integrally provided, the positioning mechanism can only include two symmetrically arranged circumferential rotation positioning mechanisms.

[0069] In the above - mentioned specific embodiments, the technical problems solved, technical solutions and beneficial effects of the present utility model are further described in detail. It should be understood that the above - mentioned are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sampling forceps clamp head action mechanism, characterized in that: include: Fixed handle (1); An outer sleeve (2), wherein the outer sleeve (2) is fixedly connected to the fixed handle (1) via a colloid (3); wherein: The encapsulated body (3) is fixedly sleeved on the rear end of the outer sleeve (2), and a positioning mechanism is provided between the encapsulated body (3) and the fixed handle (1), and the positioning mechanism is suitable for limiting the axial position of the encapsulated body (3) relative to the fixed handle (1) in the axial direction of the outer sleeve (2) and / or the circumferential position of the outer sleeve (2) in the circumferential direction.

2. The sampling forceps head actuation mechanism according to claim 1 is characterized in that: The positioning mechanism comprises at least one axial positioning mechanism for limiting the axial position of the encapsulated body (3) relative to the fixed handle (1) in the axial direction of the outer sleeve (2), and the axial positioning mechanism comprises: An axial limit slot (11), wherein the axial limit slot (11) is arranged on one of the encapsulated body (3) and the fixed handle (1); An axial positioning block (31), wherein the axial positioning block (31) is arranged on the other of the encapsulated body (3) and the fixed handle (1), and the axial positioning block (31) is engaged with the axial limiting groove (11).

3. The sampling forceps head actuation mechanism according to claim 1 is characterized in that: The outer sleeve (2) is provided with a ring (21) on the outer wall connected to the encapsulated body (3).

4. The sampling forceps head actuation mechanism according to claim 1, characterized in that: The positioning mechanism comprises at least one circumferential rotation positioning mechanism for limiting the circumferential position of the encapsulated body (3) relative to the fixed handle (1) on the circumference of the outer sleeve (2), and the circumferential rotation positioning mechanism comprises: A rotation limiting slot (12), wherein the rotation limiting slot (12) is arranged on one of the encapsulated body (3) and the fixed handle (1); A rotation positioning block (32), the rotation positioning block (32) being arranged on the other of the encapsulated body (3) and the fixed handle (1); the rotation positioning block (32) is engaged with the rotation limiting slot (12).

5. The sampling forceps head actuation mechanism according to claim 1, characterized in that: It also comprises a movable handle (4) and a pull rod (5), wherein the movable handle (4) is hinged on the fixed handle (1), and the tails of the movable handle (4) and the pull rod (5) are movably connected.

6. The sampling forceps head actuating mechanism according to claim 5 is characterized in that: A torsion spring (6) is provided between the movable handle (4) and the fixed handle (1) to enable the movable handle (4) to return to its original position after firing.

7. The sampling forceps head actuation mechanism according to claim 5, characterized in that: The tail of the pull rod (5) is hinged with a connecting block (7), and the connecting block (7) is provided with a clamping groove (71) with an opening; The movable handle (4) is provided with a plug-in slot, the movable handle (4) is provided with a clamping block (41) in the plug-in slot, the connection block (7) is inserted into the plug-in slot so that the clamping block (41) is clamped into the clamping slot (71), and the clamping block (41) has a degree of freedom of movement in the clamping slot (71).

8. The sampling forceps head actuating mechanism according to claim 7 is characterized in that: An end portion of the connection block (7) in the width direction is located in the insertion groove.

9. The sampling forceps head actuating mechanism according to claim 7, characterized in that: The clamping block (41) comprises a clamping body (41a) and a clamping end (41b) having a width greater than that of the clamping body (41a); the clamping slot (71) comprises an outer clamping slot (71a) clamped to the clamping body (41a) and an inner clamping slot (71b) clamped to the clamping end (41b); the clamping body (41a) and the outer clamping slot (71a) and the clamping end (41b) and the inner clamping slot (71b) are configured in the following structure: The outer clamping groove (71a) is a structure with a width direction in which the upper and lower parts are larger and the upper part is smaller; And / or the length of the clamping end portion (41b) in the up-down direction is smaller than the length of the inner clamping groove (71b) in the up-down direction.

10. The sampling forceps head actuation mechanism according to claim 1, characterized in that: The fixed handle (1) comprises an upper cover (10) and a lower cover (20) that are butt-jointed together; Alternatively, the fixed handle (1) comprises an upper cover portion (30) and an integrally formed handle body portion (40), and the upper cover portion (30) is slidably disposed at the tail portion on the upper side of the handle body portion (40).

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