A new type of split medical screwdriver

Abstract

The application discloses a novel split medical screwdriver, and relates to the technical field of medical screwdrivers, which comprises a tool body, a tool head, an elastic connecting rod, a sliding assembly and a pressing unlocking assembly. The elastic connecting rod is arranged in the rod piece of the tool handle, and the sliding assembly is arranged on the handle of the tool handle, so that the tool head on the end clamping part of the rod piece can be unlocked by sliding, and the pressing unlocking assembly arranged on the handle is used to press and unlock the push rod clamped on the clamping part, so that the push rod can move forward under the action of the restoring force of the restoring spring to be inserted with the tool head on the clamping part, the installation and dismounting efficiency of the tool head is effectively improved, and the operation frequency of dismounting and installing the tool head is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical screwdriver technology, specifically to a novel split-type medical screwdriver. Background Technology

[0002] Currently, the common treatment for limb fractures is to fix the bones with plates and screws. After the fracture heals, the screws fixed in the patient's body lose their function. However, these screws are considered "foreign objects" by the patient's body and need to be removed.

[0003] To shorten the time required to remove screws, reduce the risk of infection for patients, and decrease the workload of medical staff, a medical fastening component and its screwdriver are disclosed in CN115399864A. The medical screwdriver includes a blade body and a blade head. The blade body includes a handle and a locking part located at the front end of the handle. The blade head is detachably connected to the blade body, and the rear end of the blade head is provided with a locking part and a limiting part. The outer peripheral wall of the blade head is provided with a first thread. The locking part can engage with the locking part to restrict the circumferential rotation of the blade body relative to the blade head. When the locking part engages with the locking part, the limiting part can abut against the locking part to restrict the axial movement of the blade body relative to the blade head.

[0004] The application also discloses a connecting rod, which is rotated by rotating the handle at the end of the connecting rod. The central control unit moves forward and backward within the handle by rotating via a threaded connection, thereby connecting and disconnecting the connecting rod from the blade head. However, this method requires manually rotating the handle multiple times when installing and removing the blade head, resulting in low efficiency in the installation and removal of the blade head. Therefore, this application proposes a novel split-type medical screwdriver that facilitates the removal of the blade head. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the aforementioned technologies by proposing a novel split-type medical screwdriver. This invention solves the problem that the screwdriver requires manual rotation of the handle multiple times when installing and removing the screwdriver head, resulting in low efficiency in both installation and removal.

[0006] This invention provides a novel split-type medical screwdriver, comprising a blade body, the blade body including a handle portion and a locking portion disposed at the front end of the handle portion; and a blade head, the blade head being detachably connected to the blade body, and the rear end of the blade head having a fastening portion; further comprising:

[0007] The flexible connecting rod is slidably disposed inside the tool holder.

[0008] A sliding component is located on the tool holder and connected to a flexible connecting rod;

[0009] The press-to-unlock component is located on the handle and elastically abuts against the elastic connecting rod. The sliding component slides on the handle to allow the elastic connecting rod to slide inside the handle. When the elastic connecting rod slides to the rear end of the handle, it engages with the press-to-unlock component. Pressing the press-to-unlock component disengages it from the elastic connecting rod, and the elastic connecting rod moves forward to return to its original position to engage with the cutter head located in the engaging part.

[0010] A further improvement of this application is that the elastic connecting rod includes an inner core, a push rod, and a return spring disposed within the tool holder portion. The inner core is connected to the push rod, the return spring is located at the rear end of the tool holder portion, the return spring is connected to the end of the push rod, and the sliding assembly is connected to the push rod.

[0011] The handle includes a handle and a rod. The rod is connected to the handle, the push rod slides inside the handle, the inner core slides inside the rod, and the locking part is located at the end of the rod.

[0012] The sliding assembly includes a shift fork and a connector. The shift fork is slidably mounted on the handle, and the connector is fixedly sleeved on the push rod.

[0013] A further improvement of this application is that the press-to-unlock assembly includes a press pin, a locking part, and a press spring. The press pin is located on the handle, the locking part is located at the end of the press pin and inside the handle, the press spring is located inside the handle and connected to the lower end of the locking part, the push rod slides through the locking part, the locking part is provided with locking teeth, and the push rod is provided with several locking slots. The push rod slides backward to make the locking slots engage with the locking teeth.

[0014] A further improvement of this application is that a snap-fit ​​ball is provided on the snap-fit ​​part, and a snap-fit ​​ball groove is provided in the fastening part. The snap-fit ​​ball groove engages with the snap-fit ​​ball through lateral movement, thereby connecting the fastening part and the snap-fit ​​part; a slot for inserting into the inner core is provided in the fastening part.

[0015] A further improvement of this application is that round holes are provided on both sides of the end of the snap-fit ​​part, the round holes are connected to the core hole in the rod, and an elastic fastener for laterally moving and locking the snap-fit ​​part is slidably provided in the round hole. The elastic fastener moves in and out of the round hole by sliding the inner core.

[0016] The elastic fastener includes a locking part, a pushing part, and an elastic element. The locking part slides within a circular hole, and the pushing part is connected to the locking part, with its end located within a core hole. The elastic element is connected within the circular hole and to the locking part. Locking grooves are provided on both sides of the fastening part for insertion into the locking part. The push rod slides within the core hole, causing its end to abut against the pushing part, thereby pushing the locking part to stretch the elastic element out of the circular hole and into the locking groove. The end of the pushing part, located within the core hole, has a cut surface. The elastic element is a spring. A limit sleeve is provided on the locking part, with the spring located within the limit sleeve.

[0017] A further improvement of this application is that the sliding assembly also includes a blocking block, which is threadedly connected to the end of the handle, and one end of the return spring abuts against the blocking block.

[0018] Compared with existing technologies, it has the following beneficial effects:

[0019] 1. This application achieves sliding unlocking of the cutter head on the locking part at the end of the rod by setting an elastic connecting rod inside the rod and a sliding component on the handle of the cutter head. The push unlocking component on the handle is used to press and unlock the push rod that is slidably locked on the locking part, so that it can move forward under the force of the return spring to engage with the cutter head on the locking part. This effectively improves the efficiency of cutting head installation and removal and reduces the frequency of cutting head installation and removal operations.

[0020] 2. This application provides an elastic fastener on the end of the rod, and relies on the movement of the inner core within the rod to push the pushing part of the elastic fastener to drive the locking part out of the round hole on the end of the rod, so as to engage with the locking groove in the cutter head that is fastened to the end of the rod, thereby locking the cutter head in multiple directions on the end of the rod. With the above solution, when disassembling the cutter head, it is only necessary to slide the fork to automatically disengage the cutter head from the end of the rod, further improving the efficiency of the installation and disassembly of the cutter head. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only preferred embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a novel split-type medical screwdriver according to the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of a novel split-type medical screwdriver according to the present invention. Figure 2 ;

[0024] Figure 3 This is a schematic cross-sectional view of the medical screwdriver of the present invention;

[0025] Figure 4 This is a schematic diagram of the sliding component and the press-to-unlock component of the present invention;

[0026] Figure 5 This is a schematic diagram of the elastic connecting rod of the present invention;

[0027] Figure 6 This is a schematic diagram of the handle of the present invention;

[0028] Figure 7 This is a schematic diagram of the push rod and inner core of the present invention;

[0029] Figure 8 This is a schematic diagram of the pressing pin and locking part of the present invention;

[0030] Figure 9 This is a schematic diagram of the cutting head of the present invention;

[0031] Figure 10 This is a side view of the blade head of the present invention;

[0032] Figure 11 This is a schematic diagram of the rod component of the present invention;

[0033] Figure 12 This is a schematic diagram of another embodiment of the medical screwdriver of the present invention;

[0034] Figure 13 This is a schematic diagram of the cross-section of the elastic fastener of the present invention;

[0035] Figure 14 This is a partially enlarged schematic diagram of part A of the present invention;

[0036] Figure 15 This is a schematic diagram of the cooperation between the elastic fastener and the blade head of the present invention;

[0037] Figure 16 This is a schematic diagram of another embodiment of the rod of the present invention.

[0038] In the diagram, 1-blade body; 11-handle; 111-handle; 112-rod; 1121-core hole; 12-locking part; 121-locking ball; 122-round hole;

[0039] 2-Cutter head; 21-Snap-fit ​​part; 22-Slot; 23-Locking groove; 211-Snap-fit ​​ball groove;

[0040] 3-Elastic connecting rod; 31-Inner core; 32-Push rod; 33-Return spring; 321-Slot;

[0041] 4-Sliding assembly; 41-Shift fork; 42-Connector; 43-Screw;

[0042] 5-Press unlocking component; 51-Pressing pin; 52-Clamping part; 53-Pressing spring; 54-Blocking block; 55-Clamping tooth;

[0043] 6-Elastic fastener; 61-Locking part; 62-Pushing part; 63-Elastic element. Detailed Implementation

[0044] To better understand the structure, functional features, and advantages of the present invention, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

[0045] Example:

[0046] like Figures 1 to 11 As shown, the present invention provides a novel split-type medical screwdriver, including a screwdriver body 1, the screwdriver body 1 including a handle portion 2 and a locking portion 12 disposed at the front end of the handle portion 2; and a screwdriver head 2, the screwdriver head 2 being detachably connected to the screwdriver body 1, and the rear end of the screwdriver head 2 being provided with a fastening portion 21; and further including:

[0047] The elastic connecting rod 3 is slidably disposed in the handle 2, and constrains the lateral movement of the cutter head 2 by means of insertion with the cutter head 2;

[0048] The sliding component 4 is disposed on the tool holder 2 and connected to the elastic connecting rod 3 so as to push the elastic connecting rod 3 to slide within the tool holder 2;

[0049] The press-to-unlock component 5 is located on the handle portion 2 and elastically abuts against the elastic connecting rod 3. The sliding component 4 slides on the handle portion 2 to allow the elastic connecting rod 3 to slide within the handle portion 2. When the elastic connecting rod 3 slides towards the rear end of the handle portion 2, the elastic connecting rod 3 engages with the press-to-unlock component 5. Pressing the press-to-unlock component 5 disengages it from the elastic connecting rod 3, and the elastic connecting rod 3 moves forward to return to its original position to engage with the blade head 2 located within the engaging portion 12, thereby locking the lateral movement of the blade head 2.

[0050] In one embodiment of this application, see Figures 3 to 5 The elastic connecting rod 3 includes an inner core 31, a push rod 32, and a return spring 33 disposed in the tool holder 2. The inner core 31 is connected to the push rod 32. The return spring 33 is located at the rear end of the tool holder 2 and is connected to the end of the push rod 32. The sliding assembly 4 is connected to the push rod 32 so that the push rod 32 can be moved by pushing the sliding assembly 4, thereby driving the inner core 31 to move and insert into the tool head 2.

[0051] See Figure 1 The handle 2 includes a handle 111 and a rod 112. The rod 112 is fixedly connected to the handle 111 by a pin. The push rod 32 is slidably located inside the handle 111, the inner core 31 is slidably located inside the rod 112, and the locking part 12 is provided at the end of the rod 112.

[0052] See Figures 3 to 5 The sliding assembly 4 includes a shift fork 41 and a connector 42. The shift fork 41 is slidably mounted on the handle 111, and the connector 42 is fixedly sleeved on the push rod 32 by screws 43. Furthermore, the handle 111 is provided with a movable groove, in which the plug is located. The handle 111 is also provided with a through groove, which communicates with the movable groove. The connector 42 is movably located in the through groove to facilitate the disassembly of the sliding assembly 4.

[0053] See Figure 3 and Figure 5 The sliding assembly 4 also includes a blocking block 54, which is threadedly connected to the end of the handle 111. One end of the return spring 33 abuts against the blocking block 54 so that the elastic force between the return spring 33 and the push rod 32 can be adjusted by rotating the blocking block 54.

[0054] In one embodiment of this application, see Figures 3 to 5 The press-to-unlock assembly 5 includes a press pin 51, a locking part 52, and a press spring 53. The press pin 51 is located on the handle 111. The locking part 52 is located at the end of the press pin 51 and inside the handle 111. The press spring 53 is located inside the handle 111 and connected to the lower end of the locking part 52. The push rod 32 slides through the locking part 52. The locking part 52 is provided with locking teeth 55. The push rod 32 is provided with several slots 321. The push rod 32 slides backward to engage the slots 321 with the locking teeth 55.

[0055] In one embodiment of this application, see Figures 9 to 11 The snap-fit ​​part 12 is provided with a snap-fit ​​ball 121, and the snap-fit ​​part 21 is provided with a snap-fit ​​ball groove 211. The snap-fit ​​ball groove 211 is engaged with the snap-fit ​​ball 121 by moving laterally, so that the snap-fit ​​part 21 is connected to the snap-fit ​​part 12. The snap-fit ​​part 21 is provided with a slot 22 for inserting into the inner core 31, so that the protruding rod 112 of the inner core 31 can be inserted into the slot 22 in the snap-fit ​​part 21. In this embodiment, the blade head 2 is installed and removed by snapping the snap-fit ​​ball groove 211 onto the snap-fit ​​ball 121 in the lateral direction.

[0056] In this embodiment, the snap-fit ​​ball 121 can be used to limit the axial movement of the snap-fit ​​part 21 so that after the inner core 31 extends out of the rod 112 and is inserted into the slot 22 of the cutter head 2, the cutter head 2 can be locked laterally.

[0057] Furthermore, the snap-fit ​​ball 121 in this embodiment can be replaced by a rectangular structure or a protruding structure. Similarly, the snap-fit ​​ball groove 211 can be replaced by a rectangular structure or a groove structure, which aims to restrict the axial movement of the cutter head 2 along the rod 112.

[0058] One embodiment of this application is shown below, see [link to previous document]. Figures 12 to 16 The two sides of the end of the snap-fit ​​part 12 are provided with round holes 122. The round holes 122 are connected to the core hole 1121 in the rod 112. An elastic fastener 6 for laterally moving and locking the snap-fit ​​part 21 is slidably arranged in the round hole 122. The elastic fastener 6 moves in and out of the round hole 122 by sliding the inner core 31.

[0059] See Figure 14The elastic fastener 6 includes a locking part 61, a pushing part 62, and an elastic element 63. The locking part 61 is slidably located in the round hole 122. The pushing part 62 is connected to the locking part 61, and the end of the pushing part 62 is located in the core hole 1121. The elastic element 63 is connected in the round hole 122 and connected to the locking part 61. The fastening part 21 has locking grooves 23 on both sides that are inserted into the locking part 61. The push rod 32 slides in the core hole 1121 so that its end abuts against the pushing part 62, thereby pushing the locking part 61 to stretch the elastic element 63 out of the round hole 122 to be inserted into the locking groove 23.

[0060] See Figure 15 The end of the pushing part 62 is provided with a cut surface inside the core hole 1121. The cut surface contacts the front end face of the inner core 31, causing the inner core 31 to push the pushing part 62, thereby causing the locking part 61 to extend out of the circular hole 122 and engage with the locking groove 23 in the fastening part 21 on the cutter head 2. The elastic element 63 is a spring. A limit sleeve is provided on the locking part 61, and the spring is located inside the limit sleeve. By setting the spring, the locking part 61 automatically retracts into the circular hole 122 when the inner core 31 retracts and disengages from the pushing part 62. Furthermore, a platform is provided inside the circular hole 122 so that one end of the spring can be fixedly connected to the platform, so that when the inner core 112 retracts and disengages from the pushing part 62 in the core hole 1121, the locking part 61 can retract into the circular hole 122 under the action of the spring. Furthermore, the upper end of the locking part 61 is chamfered, and the opening of the locking groove 23 is also chamfered.

[0061] Furthermore, in this embodiment, a positioning groove is provided on the clamping part 12 along the axial direction, and a positioning protrusion is provided in the fastening part 21, so that the cutting head 2 can be smoothly inserted into the clamping part 12, and the locking groove 23 is directly aligned with the locking part 61. Furthermore, the positioning groove and the positioning protrusion are strip-shaped structures.

[0062] In this embodiment, an elastic fastener 6 is provided on the end locking portion 12 of the rod 112. The inner core 31 slides within the rod 112, causing its end to abut against the tangential surface of the pushing portion 62. Under the push of the inner core 31, the pushing portion 62 drives the locking portion 61 to extend out of the circular hole 122 on the locking portion 12, and insert into the locking groove 23 in the cutter head 2 that is fastened to the locking portion 12, thereby locking the cutter head 2 onto the locking portion 12 in multiple directions. When it is necessary to disassemble the cutter head 2, it is only necessary to slide... The shift fork 41 can automatically disengage the cutter head 2 from the locking part 12 at the end of the rod 112. During installation, the fastening part 21 of the cutter head 2 can be directly inserted into the locking part 12 along the axial direction. Then, press the pressing pin 51 to disengage the slot 321 on the push rod 32 from the locking tooth 55. Under the force of the return spring 33, the push rod 32 pushes the inner core 31 forward, thereby pushing the locking part 61 to extend out of the round holes 122 on both sides of the rod 112 and engage with the locking groove 23 in the fastening part 21.

[0063] Furthermore, in this embodiment, the fastening part 21 in the cutter head 2 is an internal hexagonal or polygonal structure, or it can be a plum blossom groove structure.

[0064] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of the present invention without departing from the scope of the present invention are within the protection scope of the present invention.

Claims

1. A novel split-type medical screwdriver, comprising a blade body (1), the blade body (1) including a handle portion (2) and a snap-fit ​​portion (12) disposed at the front end of the handle portion (2); and a blade head (2), the blade head (2) being detachably connected to the blade body (1), and the rear end of the blade head (2) being provided with a fastening portion (21), characterized in that... It also includes: The elastic connecting rod (3) is slidably disposed within the handle portion (2); A sliding component (4) is disposed on the handle portion (2) and connected to the elastic connecting rod (3); The press-to-unlock component (5) is located on the handle portion (2) and elastically abuts against the elastic connecting rod (3). The sliding component (4) slides on the handle portion (2) to allow the elastic connecting rod (3) to slide within the handle portion (2). When the elastic connecting rod (3) slides toward the rear end of the handle portion (2), the elastic connecting rod (3) engages with the press-to-unlock component (5). Pressing the press-to-unlock component (5) disengages it from the elastic connecting rod (3), and the elastic connecting rod (3) moves forward to return to its original position to engage with the blade head (2) located within the engaging portion (12).

2. The novel split-type medical screwdriver according to claim 1, characterized in that, The elastic connecting rod (3) includes an inner core (31), a push rod (32), and a return spring (33) disposed in the handle portion (2). The inner core (31) is connected to the push rod (32). The return spring (33) is located at the rear end of the handle portion (2). The return spring (33) is connected to the end of the push rod (32). The sliding assembly (4) is connected to the push rod (32).

3. The novel split-type medical screwdriver according to claim 2, characterized in that, The handle (2) includes a handle (111) and a rod (112). The rod (112) is connected to the handle (111). The push rod (32) is slidably located inside the handle (111). The inner core (31) is slidably located inside the rod (112). The locking part (12) is provided at the end of the rod (112).

4. The novel split-type medical screwdriver according to claim 3, characterized in that, The sliding assembly (4) includes a fork (41) and a connector (42). The fork (41) is slidably disposed on the handle (111), and the connector (42) is fixedly sleeved on the push rod (32).

5. The novel split-type medical screwdriver according to claim 3, characterized in that, The press-to-unlock assembly (5) includes a press pin (51), a locking part (52), and a press spring (53). The press pin (51) is located on the handle (111). The locking part (52) is located at the end of the press pin (51) and inside the handle (111). The press spring (53) is located inside the handle (111) and connected to the lower end of the locking part (52). The push rod (32) slides through the locking part (52). The locking part (52) is provided with locking teeth (55). The push rod (32) is provided with a plurality of slots (321). The push rod (32) slides backward to engage the slots (321) with the locking teeth (55).

6. The novel split-type medical screwdriver according to claim 4, characterized in that, The snap-fit ​​part (12) is provided with a snap-fit ​​ball (121), and the fastening part (21) is provided with a fastening ball groove (211). The fastening ball groove (211) is engaged with the snap-fit ​​ball (121) by moving laterally, so that the fastening part (21) is connected to the snap-fit ​​part (12); the fastening part (21) is provided with a slot (22) for inserting into the inner core (31).

7. The novel split-type medical screwdriver according to claim 4, characterized in that, The two ends of the snap-fit ​​part (12) are provided with round holes (122), which are connected to the core hole (1121) in the rod (112). An elastic fastener (6) for laterally moving and locking the snap-fit ​​part (21) is slidably disposed in the round hole (122). The elastic fastener (6) moves in and out of the round hole (122) by sliding the inner core (31).

8. The novel split-type medical screwdriver according to claim 7, characterized in that, The elastic fastener (6) includes a locking part (61), a pushing part (62), and an elastic element (63). The locking part (61) is slidably located in the circular hole (122). The pushing part (62) is connected to the locking part (61), and the end of the pushing part (62) is located in the core hole (1121). The elastic element (63) is connected in the circular hole (122) and connected to the locking part (61). The fastening part (21) has locking grooves (23) on both sides that are inserted into the locking part (61). The push rod (32) slides in the core hole (1121) to make its end abut against the pushing part (62) so as to push the locking part (61) to stretch the elastic element (63) out of the circular hole (122) and insert it into the locking groove (23).

9. The novel split-type medical screwdriver according to claim 8, characterized in that, The end of the pushing part (62) is provided with a cut surface inside the core hole (1121); the elastic element (63) is a spring; a limiting sleeve is provided on the locking part (61), and the spring is located inside the limiting sleeve.

10. The novel split-type medical screwdriver according to claim 3, characterized in that, It also includes a sealing block (54), which is threadedly connected to the end of the handle (111), and one end of the reset spring (33) abuts against the sealing block (54).

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