Gear shifting device and electric stapler

Abstract

The present invention discloses a gear shifting device and an electric stapler. The gear shifting device includes a gear shifting knob, a gear shifting lever, a gear shifting lever connecting rod, a rack and a microswitch. When the gear shifting knob is toggled, it drives the gear shifting lever to move up and down. When the gear shifting lever moves to the corresponding gear, the bottom thereof will contact the corresponding rack notch on the rack. When the rack advances, it drives the gear shifting lever and the gear shifting lever connecting rod to advance simultaneously until the lever of the gear shifting lever connecting rod triggers the microswitch to disconnect the circuit, controlling the rack to advance a corresponding distance. The gear shifting device is arranged in the electric stapler, and by adjusting the gear shifting device, different advancing distances of the rack are controlled to achieve the interchange of the staple cartridge assemblies. By the above method, the gear shifting device and the electric stapler of the present invention can achieve cutting and stapling of three different lengths on the same electric stapler, greatly reducing the cost of the instruments required for each operation, reducing the operation time and reducing the operation risk.

Description

Technical Field

[0001] The present invention relates to the technical field of electric staplers, and particularly to a gear shifting device and an electric stapler. Background Art

[0002] An electric stapler uses titanium staples to sever or anastomose tissues. The operation is simple and rapid, greatly shortening the operation time, and can replace traditional manual suturing. The electric stapler has become an indispensable medical device in the auxiliary process of wound suturing.

[0003] During the surgical operation process, the staple cartridge assembly of the stapler is assembled onto the instrument, and the staple cartridge assembly in the closed state is passed through a trocar used in conjunction with the stapler into the human tissue. Then, the position of the staple cartridge assembly is manually adjusted. After reaching the appropriate position, the staple cartridge and the anvil of the staple cartridge assembly are opened, and the tissue is clamped therein. Then, the instrument handle is fired to cut and staple the tissue. After cutting and stapling are completed, the staple cartridge assembly is opened to release the tissue. After the staple cartridge assembly is closed again, it is taken out through the trocar.

[0004] In currently commonly used electric staplers, only one type of staple cartridge assembly with a single length can be installed on one gun body, and the staple cartridge assembly cannot be replaced. In this way, during the operation, in order to meet different anastomosis requirements, doctors need to switch to different staplers, resulting in a significant increase in the instrument cost of the operation and an increase in the surgical risk. Summary of the Invention

[0005] The main technical problem to be solved by the present invention is to provide a gear shifting device and an electric stapler, which can achieve cutting and anastomosis with three different lengths on the same electric stapler, can greatly reduce the instrument cost required for each operation, greatly reduce the time required for doctors to switch staplers with different anastomosis lengths during the operation, thereby reducing the operation time and reducing the surgical risk.

[0006] To solve the above technical problem, a technical solution adopted by the present invention is: to provide a gear shifting device, including: a gear shift knob, a gear shift lever, a gear shift lever connecting rod, a gear shift lever limiting block, a rack, and a micro switch.

[0007] The gear shift knob is connected to the gear shift lever. A gear shift lever connecting rod that moves synchronously with the gear shift lever is connected to the gear shift lever. Different gear slots are provided on the gear shift lever connecting rod to enable the gear shift lever to move between different upper and lower gears. A lever is provided on the surface of the gear shift lever connecting rod that cooperates with the micro switch.

[0008] Toggle the gear shift knob, driving the gear shift lever to move up and down. When the gear shift lever moves to the corresponding gear position, the bottom of the gear shift lever will come into contact with the corresponding rack slot on the rack. While the rack advances, it drives the gear shift lever and the gear shift lever connecting rod to advance simultaneously until the lever of the gear shift lever connecting rod triggers the micro switch to disconnect the circuit, controlling the rack to advance a corresponding distance.

[0009] In a preferred embodiment of the present invention, there is also a gear position indicator PCB assembly, which includes a gear position indicator switch, a gear position indicator, and a PCB board. The PCB board is electrically connected to the gear position indicator and the gear position indicator switch.

[0010] In a preferred embodiment of the present invention, the gear position indicator switch is snap-connected to the gear shift knob. When the gear shift knob moves up and down, it drives the gear position indicator switch to move up and down simultaneously, controlling the gear position indicator at the corresponding position to light up.

[0011] In a preferred embodiment of the present invention, the upper and lower sides of the top end of the gear shift knob have locking feet that cooperate with the gear position indicator switch. The locking teeth on the gear position indicator switch are snapped into the card slots formed by the two side locking feet; the lower end of the gear shift knob has a mounting slot hole into which the gear shift lever can be inserted, and the gear shift lever is axially fixed in the mounting slot hole of the gear shift knob.

[0012] In a preferred embodiment of the present invention, the rack has three rack slots arranged in a stepped manner in sequence, and the advancing distance of the rack is determined according to the positions of different rack slots.

[0013] In a preferred embodiment of the present invention, the gear shift lever includes an upper section, a middle section, and a lower section connected in sequence: the upper section includes a buckle that can be inserted into the mounting slot hole of the gear shift knob, and the shape and size of the buckle are set to match the mounting slot hole; the middle section includes a clamping plate that can move up and down in the gear slot of the gear shift lever connecting rod, and a gear position limiting protrusion is provided on the corresponding side of the clamping plate; the lower section includes a contact point that contacts the corresponding different rack slots on the rack.

[0014] In a preferred embodiment of the present invention, the gear shift lever connecting rod includes a connecting rod base, a gear slot, and a lever. The gear slot is arranged on the front end face of the connecting rod base. The gear slot has three slot openings for the clamping plate to move up and down and be snap-connected. The lever is arranged on the side of the connecting rod base close to the micro switch at the rear.

[0015] In a preferred embodiment of the present invention, the inside of the connecting rod base has a cavity capable of accommodating a gear position limiting projection. A gear shift lever spring sleeved on the gear position limiting projection is further arranged in the cavity. Under the action of the gear shift lever spring and the gear position limiting projection, the gear shift lever connecting rod synchronously moves with the gear shift lever and fixes the clamping plate in the middle section at the notch of the corresponding gear slot. The gear positions of the up-and-down movement of the gear shift lever are fixed through the flexible connection of the gear shift lever spring and three different notches of the gear shift lever connecting rod.

[0016] In a preferred embodiment of the present invention, the gear shift device further includes a gear position limiting fixing seat, a gear shift lever limiting block, and a gear position limiting block spring. The gear position limiting fixing seat is arranged above the rack, and the gear position indicator PCB assembly is installed on the gear position limiting fixing seat.

[0017] The gear shift lever limiting block and the gear position limiting block spring are installed in the gear position limiting fixing seat. When the gear shift lever leaves the gear shift button, the gear position limiting block will enter the gear shift button under the action of the gear position limiting block spring, thereby restricting the up-and-down movement of the gear shift button.

[0018] To solve the above technical problems, another technical solution adopted by the present invention is: to provide an electric stapler, including a stapler gun body. One side of the stapler gun body is an operation handle, and the other side is a staple cartridge assembly. The motor drive assembly inside the operation handle controls the forward and backward movement of the rack. The rack is connected to the staple cartridge assembly. A gear shift device is arranged inside the stapler gun body, and different forward distances of the rack are controlled by adjusting the gear shift device to realize the interchange of staple cartridge assemblies with different lengths.

[0019] The beneficial effects of the present invention are: the gear shift device and the electric stapler of the present invention can realize three different lengths of cutting and stapling on the same electric stapler, which can greatly reduce the instrument cost required for each operation, greatly reduce the time required for the doctor to switch staplers with different anastomosis lengths during the operation, thereby reducing the operation time and reducing the operation risk. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0021] Figure 1 is a schematic structural diagram of a preferred embodiment of the gear shift device of the present invention;

[0022] Figure 2It is the front view when the gear shift lever in the gear shifting device of the present invention moves to one of the gears;

[0023] Figure 3 It is the front view when the gear shift lever in the gear shifting device of the present invention retracts into the gear shift button;

[0024] Figure 4 It is the structural schematic diagram of the gear position indicator PCB assembly in the gear shifting device of the present invention;

[0025] Figure 5 It is the structural schematic diagram of the gear shift button in the gear shifting device of the present invention;

[0026] Figure 6 It is the structural schematic diagram of the micro switch in the gear shifting device of the present invention;

[0027] Figure 7 It is the structural schematic diagram of the gear shift lever connecting rod in the gear shifting device of the present invention;

[0028] Figure 8 It is the structural schematic diagram of the gear shift lever in the gear shifting device of the present invention;

[0029] Figure 9 It is the structural schematic diagram of the gear shift lever limit block in the gear shifting device of the present invention;

[0030] Figure 10 It is the structural schematic diagram of the gear position limit fixing seat in the gear shifting device of the present invention;

[0031] Figure 11 It is the structural schematic diagram of the rack in the gear shifting device of the present invention;

[0032] The markings of each component in the drawings are as follows: 100, gear position indicator PCB assembly, 110, indicator switch, 111, engaging teeth, 120, gear position indicator, 200, gear shift button, 210, engaging feet, 220, mounting slot holes, 300, micro switch,

[0033] 400, gear shift lever connecting rod, 410, connecting rod base, 411, cavity, 420, gear position slot, 421, slot opening, 430, lever, 500, gear shift lever spring,

[0034] 600, gear shift lever, 610, upper section, 611, insertion buckle, 620, middle section, 621, clamping plate, 622, gear position limit protrusion, 630, lower section, 631, contact point,

[0035] 700, gear shift lever limit block, 800, gear position limit block spring, 900, gear position limit fixing seat, 1000, rack, 1010, rack slot opening. Detailed implementation mode

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figures 1 to 11 , the embodiments of the present invention include: Embodiment

[0038] A gear shifting device includes: a gear shift button 200, a gear shift lever 600, a gear shift lever connecting rod 400, a gear shift lever limiting block 700, a rack 1000 and a micro switch 300. The gear shift button 200 is connected to the gear shift lever 600. A gear shift lever connecting rod 400 that moves synchronously with the gear shift lever 600 is connected to the gear shift lever 600. Different gear slots 420 are provided on the gear shift lever connecting rod 400 to realize the movement of the gear shift lever 600 between different upper and lower gears. A lever 430 is provided on the surface of the gear shift lever connecting rod 400 that cooperates with the micro switch 300.

[0039] When the gear shift button 200 is toggled, it drives the gear shift lever 600 to move up and down. When the gear shift lever 600 moves to the corresponding gear, the bottom of the gear shift lever 600 will contact the corresponding rack notch 1010 on the rack 1000. While the rack 1000 advances, it drives the gear shift lever 600 and the gear shift lever connecting rod 400 to advance simultaneously until the lever 430 of the gear shift lever connecting rod 400 triggers the micro switch 300 to disconnect the circuit and controls the rack 1000 to advance a corresponding distance.

[0040] The gear shifting device further includes a gear position indicator PCB assembly 100. The gear position indicator PCB assembly 100 includes a gear position indicator switch 110, a gear position indicator 120 and a PCB board. The PCB board is electrically connected to the gear position indicator 120 and the gear position indicator switch 110. Among them, the gear position indicator switch 110 is clamped with the gear shift button 200. When the gear shift button 200 moves up and down, it drives the gear position indicator switch 110 to move up and down to control the gear position indicator 120 at the corresponding position to light up.

[0041] Further, clamping feet 210 that cooperate with the gear position indicator switch are provided on the upper and lower sides of the top end of the gear shift button 200. The teeth 111 on the gear position indicator switch 110 are inserted into the card slots formed by the clamping feet 210 on both sides; an installation slot hole 220 into which the gear shift lever 600 can be inserted is provided at the lower end of the gear shift button 200, and the gear shift lever 600 is axially clamped in the installation slot hole 220 of the gear shift button 200.

[0042] The rack 1000 has three rack notches 1010 arranged in a stepped manner in sequence, and the advancing distance of the rack 1000 is determined according to the positions of different rack notches 1010.

[0043] The gear shift lever 600 includes an upper segment 610 that can be inserted into the mounting slot hole 220 of the gear shift button 200, a middle segment 620 that can move within the gear slot 420 of the gear shift link 400, and a lower segment 630 that contacts the rack notch 1010.

[0044] Among them, the upper segment 610 includes a buckle 611 that can be inserted into the mounting slot hole 220 of the gear shift button 200, and the shape and size of the buckle 611 are set in cooperation with the mounting slot hole 220; the middle segment 620 includes a clamping plate 621 that can move up and down within the gear slot 420 of the gear shift link 400, and a gear position limiting protrusion 622 is provided on the corresponding side of the clamping plate 621; the lower segment 630 includes a contact point 631 that contacts the corresponding different rack notches 1010 on the rack 1000.

[0045] The gear shift link 400 includes a link base 410, a gear slot 420, and a lever 430. The gear slot 420 is provided on the front end face of the link base 410. The gear slot 420 has three slot openings 421 for the clamping plate 621 to move up and down and be clamped, and the lever 430 is provided on one side of the link base 410 close to the micro switch 300 at the rear.

[0046] The link base 410 has a cavity 411 inside that can accommodate the gear position limiting protrusion 622. A gear shift lever spring 500 sleeved on the gear position limiting protrusion 622 is also provided inside the cavity 411. Under the action of the gear shift lever spring 500 and the gear position limiting protrusion 622, the gear shift link 400 synchronizes with the gear shift lever 600 and fixes the clamping plate 621 of the middle segment 620 in the corresponding slot opening 421 of the gear slot 420.

[0047] The gear position of the gear shift lever 600 moving up and down is fixed by the flexible connection of the gear shift lever spring 500 and the three different slot openings 421 of the gear shift link 400, so that the switching is convenient and the position is clear.

[0048] The gear shift device further includes a gear position limiting fixed seat 900, a gear shift lever limiting block 700, and a gear position limiting block spring 800. The gear position limiting fixed seat 900 is provided above the rack 1000, and the gear position indicator PCB assembly 100 is installed on the gear position limiting fixed seat 900.

[0049] The shift lever limiting block 700 and the shift limiting block spring 800 are installed inside the shift limiting fixed seat 900. When the shift lever 600 leaves the shift button 200, the shift lever limiting block 700 will enter the shift button 200 under the action of the shift limiting block spring 800, thereby restricting the up and down movement of the shift button 200.

[0050] The shift lever limiting block 700 has three card slots, and the three card slots will limit the position of the shift button 200 according to the corresponding position when the shift lever 600 leaves the shift button 200, so that the shift button 200 stops at the corresponding gear and cannot move up and down.

[0051] When the jaws at the front end of the stapler are opened, that is, when the rack 1000 retracts to the rearmost end, the shift lever 600 retracts into the shift button 200 and squeezes out the shift lever limiting block 700. At this time, gear shifting can be achieved; in addition, the shift button 200 cannot be toggled up and down under the action of the shift lever limiting block 700 and the shift limiting block spring 800, so gear shifting cannot be achieved. In other words, gear shifting can only be performed when the jaws are open.

[0052] When the shift lever 600 switches gears up and down, that is, in the normal working state, the shift lever limiting block 700 will not restrict the up and down movement of the shift lever 600. Only when the shift lever 600 does not retract into the shift button 200 and does not squeeze out the shift lever limiting block 700 from the shift button 200, the shift lever limiting block 700 will restrict the shift button 200 from moving up and down inside the shift button 200, thus restricting gear shifting.

[0053] The working principle of the gear shifting device is:

[0054] When the shift button 200 is toggled up and down, it simultaneously drives the shift lever 600 and the gear indicator switch 110 to move up and down.

[0055] When the shift lever 600 moves to any gear, the clamping plate 621 of the middle section 620 is engaged into the corresponding card slot 421 on the shift lever connecting rod 400, and at the same time, the contact 631 of its lower section 630 will contact the corresponding different rack slots 1010 on the rack 1000.

[0056] While the rack 1000 advances, the rack slot 1010 drives the shift lever 600, and the shift lever 600 drives the shift lever connecting rod 400 to advance simultaneously until the lever 430 of the shift lever connecting rod 400 triggers the micro switch 300 and the circuit is disconnected, and the instrument stops advancing.

[0057] When the rack 1000 retracts to the rearmost end, the gear shift lever 600 retracts into the gear shift button 200, squeezing out the gear shift lever stop 700. At this time, gear shifting can be achieved.

[0058] In addition, under the action of the gear shift button stop 700 and the gear stop spring 800, the gear shift button 200 cannot be toggled up and down, so gear shifting cannot be achieved. In other words, gear shifting can only be performed when the staple cartridge assembly is in the open state.

[0059] The length of the forward movement of the instrument is determined by the positions of different rack notches 1010 on the rack 1000. The more backward the rack notch 1010 is, the farther the instrument advances.

[0060] When the switch of the gear indicator light 120 moves up and down, it will drive the indicator light at the corresponding position to light up, and the gear position can be clearly and intuitively seen. Embodiment

[0061] An electric stapler includes a stapler body. One side of the stapler body is an operation handle, and the other side is a staple cartridge assembly. The motor drive assembly inside the operation handle controls the forward and backward movement of the rack, and the rack is connected to the staple cartridge assembly.

[0062] A gear shifting device in Embodiment 1 is provided inside the stapler body. By adjusting the gear shifting device, different forward distances of the rack are controlled to achieve the interchange of staple cartridge assemblies of different lengths.

[0063] The operation steps for gear shifting are as follows:

[0064] The operation of gear shifting is very simple. Only by toggling the gear shift button up, down, and in the middle can the mutual switching of three gears be achieved.

[0065] Preferably, a multi-gear electric stapler that can simultaneously switch to load staple cartridge assemblies of three different lengths, 30, 45, and 60.

[0066] The beneficial effects of the gear shifting device and the electric stapler of the present invention are:

[0067] Three different lengths of cutting and stapling can be achieved on the same electric stapler, which can greatly reduce the instrument cost required for each operation, greatly reduce the time required for the doctor to switch staplers of different anastomosis lengths during the operation, thereby reducing the operation time and reducing the operation risk.

[0068] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural or equivalent process transformations made using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. A gear switching device, It is characterized in that include: Shift knob, shift lever, shift lever connecting rod, shift lever limit block, rack and micro switch, The gear shift knob is connected to the gear shift lever, and the gear shift lever is connected to a gear shift lever connecting rod that moves synchronously with the gear shift lever. The gear shift lever connecting rod has different gear slots for realizing the movement of the gear shift lever between different upper and lower gears. A shift lever is provided on the side of the gear shift lever connecting rod that cooperates with the micro switch. The gear shift knob is turned to drive the gear shift lever to move up and down. When the gear shift lever moves to the corresponding gear position, the bottom of the gear shift lever will contact the corresponding rack notch on the rack. When the rack moves forward, the gear shift lever and the gear shift lever connecting rod will move forward at the same time until the lever of the gear shift lever connecting rod triggers the micro switch to disconnect the circuit, and the rack is controlled to move forward a corresponding distance. The gear shift lever comprises an upper section, a middle section and a lower section which are connected in sequence: the upper section comprises a plug which can be inserted into the gear shift button mounting slot, and the shape and size of the plug are matched with the mounting slot; the middle section comprises a card plate which can move up and down in the gear card slot of the gear shift lever connecting rod, and a gear limit protrusion is arranged on the side corresponding to the card plate; the lower section comprises a contact point which contacts with corresponding different rack slots on the rack; The gear switching lever connecting rod comprises a connecting rod base, a gear slot and a shifting lever. The gear slot is arranged on the front end face of the connecting rod base. The gear slot has three slot openings for the card plate to move up and down and be engaged. The shifting lever is arranged on the rear side of the connecting rod base close to the micro switch. The connecting rod base has a cavity inside which can accommodate the gear limit protrusion, and a gear shift lever spring sleeved on the gear limit protrusion is also arranged in the cavity. The gear shift lever connecting rod moves synchronously with the gear shift lever under the action of the gear shift lever spring and the gear limit protrusion and fixes the clamping plate of the middle section in the corresponding gear clamping slot. The gear position of the gear shift lever moving up and down is fixed by the soft link of the gear shift lever spring and the three different clamping slots of the gear shift lever connecting rod; It also includes a gear limit fixing seat, a gear switching lever limit block and a gear limit block spring. The gear limit fixing seat is arranged above the rack, and the gear indicator light PCB assembly is installed on the gear limit fixing seat. The gear shift lever limit block and the gear limit block spring are installed in the gear limit fixing seat. When the gear shift lever leaves the gear dial button, the gear limit block will enter the gear dial button under the action of the gear limit block spring, thereby limiting the up and down movement of the gear dial button.

2. The gear switching device according to claim 1, It is characterized in that It also includes a gear indicator light PCB assembly, which includes a gear indicator light switch, a gear indicator light and a PCB board. The PCB board is electrically connected to the gear indicator light and the gear indicator light switch.

3. The gear shifting device according to claim 2, It is characterized in that The gear indicator light switch is connected to the gear dial button. The up and down movement of the gear dial button drives the up and down movement of the gear indicator light switch, controlling the gear indicator light at the corresponding position to light up.

4. The gear shifting device according to claim 3, It is characterized in that The upper and lower sides of the top of the gear shift knob are provided with clamping feet that cooperate with the gear position indicator switch, and the teeth on the gear position indicator switch are snapped into the card slots formed by the clamping feet on both sides; The lower end of the gear shift knob is provided with a mounting slot hole into which the gear shift lever can be inserted, and the gear shift lever is axially fixed in the mounting slot hole of the gear shift knob.

5. The gear shift device according to claim 4, characterized in that The rack has three rack notches arranged in a stepped manner in sequence, and the advancing distance of the rack is determined according to the positions of different rack notches.

6. An electric stapler, characterized in that it includes a stapler body, one side of the stapler body is an operating handle, the other side is a staple cartridge assembly, the motor drive assembly inside the operating handle controls the forward and backward movement of the rack, and the rack is connected to the staple cartridge assembly, a gear shift device as described in any one of claims 1 to 5 is provided inside the stapler body, and by adjusting the gear shift device, different advancing distances of the rack are controlled to achieve the interchange of staple cartridge assemblies of different lengths.

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