Digital sensor for a stapler

Abstract

The utility model discloses an anastomat digital sensor, including elastomer, round membrane type strain gauge, flexible PCB and external digital amplifier, and elastomer includes outer cylinder, inner cylinder and connecting arm, and the hollow structure of outer cylinder, inner cylinder is set up coaxially, and the upper surface of connecting arm and the inner wall of outer cylinder, the outer wall of inner cylinder form upper concave structure, and the upper concave structure is filled with sealant, and the lower surface of connecting arm is provided with annular U type groove, round membrane type strain gauge sets up on the upper surface of connecting arm, and flexible PCB sets up on round membrane type strain gauge, and external digital amplifier and flexible PCB electric connection. The utility model discloses in elastomer's inner cylinder and outer cylinder coaxial setting, make the mounting surface and fixed surface coaxial, can eliminate the output signal influence of installation stress to sensor, and the design of elastomer bottom annular U type groove makes positive and negative strain equal, improves product precision.

Description

Technical Field

[0001] This utility model belongs to the field of digital sensors, specifically relating to a digital sensor for anastomosis devices. Background Technology

[0002] Anastomosing devices are surgical instruments that replace manual sutures. They work by using titanium staples to separate or anastomose tissue, similar to a stapler. The advent of electric anastomosing devices has greatly improved surgical efficiency and precision, achieving precise tissue anastomosis through an electric motor and other mechanical components.

[0003] Existing electric staplers use an electric drive system to provide sufficient torque and speed to drive the stapler's moving parts. A control system manages the operation of the electric motor, monitors the stapler's status, and ensures that its movements meet the needs of the surgical procedure. While the anastomosis speed can be controlled by the electric drive system's motor rotation speed, it cannot monitor the anastomosis force. Different tissues require different anastomosis forces; if the anastomosis force is not monitored during the procedure, it can lead to unsuccessful anastomosis or tissue damage.

[0004] Therefore, a digital sensor for anastomosis devices is urgently needed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a digital sensor for anastomosis devices.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] This utility model provides a digital sensor for anastomosis devices, including an elastomer, a circular strain gauge, a flexible PCB, and an external digital amplifier. The elastomer includes an outer cylinder, an inner cylinder, and a connecting arm. The outer and inner cylinders are coaxial hollow structures. The upper and lower ends of the outer cylinder are lower than the upper and lower ends of the inner cylinder, respectively. An upward concave structure is formed between the upper surface of the connecting arm and the inner wall of the outer cylinder and the outer wall of the inner cylinder. The upward concave structure is filled with sealant. An annular U-shaped groove is formed on the lower surface of the connecting arm. The circular strain gauge is disposed on the upper surface of the connecting arm, and the flexible PCB is disposed on the circular strain gauge. The external digital amplifier is electrically connected to the flexible PCB.

[0008] Preferably, the circular strain gauge includes a substrate, a first strain gauge, a second strain gauge, a third strain gauge, a fourth strain gauge, and leads. The first, second, third, and fourth strain gauges are disposed on the upper surface of the substrate. The first and third strain gauges are located on the same circumference, as are the second and fourth strain gauges. The first and third strain gauges are located on the outer ring of the second and fourth strain gauges. One end of the first strain gauge and one end of the second strain gauge are electrically connected to a flexible PCB via leads. The other ends of the first and fourth strain gauges are also electrically connected to the flexible PCB via leads.

[0009] Preferably, the first strain gauge, the second strain gauge, the third strain gauge, and the fourth strain gauge are arc-shaped sheet structures. A first gap is provided between the two ends of the first strain gauge and the two ends of the third strain gauge, and a second gap is provided between the two ends of the second strain gauge and the two ends of the fourth strain gauge. The first gap and the second gap are staggered in the circumferential direction.

[0010] Preferably, at least one pair of sidewall grooves are formed on the sidewall of the outer cylinder from its lower end upwards, and each pair of sidewall grooves is located on the same diameter line.

[0011] Preferably, a reinforcing plate is also provided on the lower surface of the flexible PCB.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] (1) In this utility model, the inner cylinder and outer cylinder of the elastomer are coaxially arranged, so that the mounting surface and the fixing surface are coaxial, which can eliminate the influence of installation stress on the output signal of the sensor. The annular U-shaped groove design at the bottom of the elastomer makes the positive and negative strains equal, improving the product accuracy. The elastomer has a simple structure, is made of stainless steel, and has a normal service life of up to 16,000,000 cycles.

[0014] (2) This utility model adopts a circular film strain gauge, which reduces the requirements for installation or loading and has high precision.

[0015] (3) The external digital amplifier in this utility model has a self-diagnostic function. If a bridge short circuit or open circuit occurs, it can output a diagnostic signal, which is convenient for the host computer to process the signal. According to the fault code, the nature and location of the fault can be quickly and accurately determined. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a digital sensor for a stapler according to this utility model;

[0017] Figure 2 This is a top view of a digital sensor for an anastomosis device according to this utility model;

[0018] Figure 3 This is an exploded view of a digital sensor for a stapler according to this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of a circular diaphragm strain gauge in a digital sensor for a stapler according to this utility model;

[0020] Figure 5 This is a schematic diagram of the flexible PCB structure in a digital sensor for a stapler according to this utility model. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," etc., indicating the orientation or positional relationship are all based on the accompanying drawings. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figures 1 to 5 As shown, this embodiment provides a digital sensor for an anastomosis device, including an elastomer 1, a circular strain gauge 2, a flexible PCB 3, and an external digital amplifier 4.

[0025] In this embodiment, the elastomer 1 includes an outer cylinder 11, an inner cylinder 12, and a connecting arm 13. The outer cylinder 11 and the inner cylinder 12 are coaxial hollow structures. The upper and lower end faces of the outer cylinder 11 are lower than the upper and lower end faces of the inner cylinder 12, respectively. A concave structure is formed between the upper surface of the connecting arm 13 and the inner wall of the outer cylinder 11 and the outer wall of the inner cylinder 12. The concave structure is filled with sealant 5. An annular U-shaped groove 14 is formed on the lower surface of the connecting arm 13. The coaxial arrangement of the inner and outer cylinders of the elastomer ensures that the mounting surface and the fixing surface are coaxial, eliminating the influence of installation stress on the sensor's output signal. The annular U-shaped groove design at the bottom of the elastomer ensures equal positive and negative strain, improving product accuracy. The elastomer has a simple structure, is made of stainless steel, and has a normal service life of up to 16,000,000 cycles.

[0026] In this embodiment, the circular strain gauge 2 is disposed on the upper surface of the connecting arm 13, the flexible PCB 3 is disposed on the circular strain gauge 2, and the external digital amplifier 4 is electrically connected to the flexible PCB 3. The flexible PCB forms a bridge circuit with the circular strain gauges, and the external digital amplifier adds a self-diagnostic function. If a short circuit or open circuit occurs in the bridge circuit, a diagnostic signal can be output, which facilitates signal processing by the host computer. Based on the fault code, the nature and location of the fault can be quickly and accurately determined.

[0027] like Figure 4As shown, the circular strain gauge 2 includes a substrate 20, a first strain gauge 21, a second strain gauge 22, a third strain gauge 23, a fourth strain gauge 24, and a lead wire 25. The first strain gauge 21, the second strain gauge 22, the third strain gauge 23, and the fourth strain gauge 24 are disposed on the upper surface of the substrate 20. The first strain gauge 21 and the third strain gauge 23 are located on the same circumference, as are the second strain gauge 22 and the fourth strain gauge 24. The first strain gauge 21 and the third strain gauge 23 are located on the outer ring of the second strain gauge 22 and the fourth strain gauge 24. One end of the first strain gauge 21 and one end of the second strain gauge 22 are electrically connected to the flexible PCB 3 via the lead wire 25. The other end of the first strain gauge 21 and one end of the fourth strain gauge 24 are electrically connected to the flexible PCB 3 via the lead wire 25. One end of the third strain gauge 23 and the other end of the second strain gauge 22 are electrically connected to the flexible PCB 3 via the lead wire 25. The other end of the third strain gauge 23 and the other end of the fourth strain gauge 24 are electrically connected to the flexible PCB 3 via the lead wire 25. The first strain gauge 21, the second strain gauge 22, the third strain gauge 23, and the fourth strain gauge 24 are designed as arc-shaped sheet structures. A first gap is provided between the two ends of the first strain gauge 21 and the two ends of the third strain gauge 23, and a second gap is provided between the two ends of the second strain gauge 22 and the two ends of the fourth strain gauge 24. The first and second gaps are staggered in the circumferential direction, which facilitates wiring and avoids current interference between connecting wires. Circular diaphragm strain gauges are attached to the annular strain region of the elastomer. While the accuracy of the attachment position is not high, it can effectively reduce errors caused by off-center or eccentric loads. Therefore, the sensor accuracy of circular diaphragms is relatively high.

[0028] In this embodiment, a pair of sidewall grooves 15 are provided on the sidewall of the outer cylinder 11 from its lower end upward. The pair of sidewall grooves 15 are located on the same diameter line, and the sidewall grooves can prevent the sensor from rotating.

[0029] In this embodiment, a reinforcing plate 31 is also provided on the lower surface of the flexible PCB 3. Adding the reinforcing plate can reduce the conduction of high temperature during welding, thereby protecting the strain gauge wire grid.

[0030] The working principle of this embodiment will be further explained below:

[0031] The sensor is mounted on the force-bearing push rod of the anastomosis device. The motor drives the push rod forward, and the force on the push rod acts on the sensor. The elastic body of the sensor deforms under the force, causing the strain gauge to deform. As a result, the resistance of the strain gauge changes, which is converted into a change in sensor voltage by the bridge circuit. The digital amplifier converts the voltage output into a force value output.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A digital sensor for an anastomosis device, characterized in that, The system includes an elastomer (1), a circular strain gauge (2), a flexible PCB (3), and an external digital amplifier (4). The elastomer (1) includes an outer cylinder (11), an inner cylinder (12), and a connecting arm (13). The outer cylinder (11) and the inner cylinder (12) are coaxial hollow structures. The upper and lower ends of the outer cylinder (11) are lower than the upper and lower ends of the inner cylinder (12), respectively. The upper end of the connecting arm (13) is lower than the lower end of the inner cylinder (12). A concave structure is formed between the surface and the inner wall of the outer cylinder (11) and the outer wall of the inner cylinder (12). The concave structure is filled with sealant (5). An annular U-shaped groove (14) is opened on the lower surface of the connecting arm (13). The circular film strain gauge (2) is disposed on the upper surface of the connecting arm (13). The flexible PCB (3) is disposed on the circular film strain gauge (2). The external digital amplifier (4) is electrically connected to the flexible PCB (3).

2. The digital sensor for an anastomosis device according to claim 1, characterized in that, The circular strain gauge (2) includes a substrate (20), a first strain gauge (21), a second strain gauge (22), a third strain gauge (23), a fourth strain gauge (24), and a lead wire (25). The first strain gauge (21), the second strain gauge (22), the third strain gauge (23), and the fourth strain gauge (24) are disposed on the upper surface of the substrate (20). The first strain gauge (21) and the third strain gauge (23) are located on the same circumference, and the second strain gauge (22) and the fourth strain gauge (24) are located on the same circumference. The first strain gauge (21) and the third strain gauge (23) are located on the upper surface of the substrate (20). The outer ring of the first strain gauge (21) and the fourth strain gauge (24) is connected to the flexible PCB (3) via a lead wire (25) at one end of the first strain gauge (21) and the second strain gauge (22). The other end of the first strain gauge (21) and the fourth strain gauge (24) are connected to the flexible PCB (3) via a lead wire (25). The other end of the third strain gauge (23) and the second strain gauge (22) are connected to the flexible PCB (3) via a lead wire (25). The other end of the third strain gauge (23) and the other end of the fourth strain gauge (24) are connected to the flexible PCB (3) via a lead wire (25).

3. The digital sensor for an anastomosis device according to claim 2, characterized in that, The first strain gauge (21), the second strain gauge (22), the third strain gauge (23), and the fourth strain gauge (24) are arc-shaped sheet structures. A first gap is provided between the two ends of the first strain gauge (21) and the two ends of the third strain gauge (23), and a second gap is provided between the two ends of the second strain gauge (22) and the two ends of the fourth strain gauge (24). The first gap and the second gap are staggered in the circumferential direction.

4. The digital sensor for an anastomosis device according to claim 1, characterized in that, At least one pair of sidewall grooves (15) are provided on the sidewall of the outer cylinder (11) from its lower end upward, and each pair of sidewall grooves (15) is located on the same diameter line.

5. The digital sensor for an anastomosis device according to claim 1, characterized in that, The flexible PCB (3) is further provided with a reinforcing plate (31) on its lower surface.

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