Large-flow pressure and temperature measuring endoscope head end shell

Abstract

The invention discloses a high-flow pressure and temperature measuring endoscope head end shell which is characterized in that an elliptical instrument channel mounting hole and a camera module mounting hole are formed in an end shell body, a snake bone mounting bracket is arranged at the near end of the end shell body, a sensor mounting hole is formed in the end shell body, and a sensor assembly is mounted in the sensor mounting hole; the radial sectional area of the instrument channel mounting hole is the same as that of the near end; compared with the prior art, large flow can be realized by arranging the instrument channel mounting hole for irrigation, and the pressure is more uniform; according to the size of the cross section of an instrument channel mounting hole, the long axis of the cross section is 1.8 mm, and the short axis of the cross section is 1.2 mm; compared with the prior art, the flow is larger, and the pressure is more uniform; the radial sectional area of the instrument channel mounting hole is the same as the radial sectional area of the near end; the fitting performance of the end shell body with the same radial sectional area of the far end and the near end of the instrument channel mounting hole is better.

Description

Technical Field

[0001] The invention relates to a large-flow pressure-measuring and temperature-measuring endoscope lens end shell, in particular to a large-flow pressure-measuring and temperature-measuring endoscope lens end shell. Background Art

[0002] An endoscope is a detection instrument that integrates traditional optics, ergonomics, precision mechanics, modern electronics, mathematics, and software. It has image sensors, optical lenses, light sources, mechanical devices and other components. It can enter the human body through natural orifices or surgical incisions and is used to diagnose and treat a variety of diseases.

[0003] Existing end caps of endoscopes are usually made of transparent or translucent materials to facilitate doctors to observe the surgical site. At the same time, the end caps may also be equipped with various sensors and channels to meet various needs during the operation. Existing end caps of endoscopes are usually made of highly light-transmitting materials to ensure that doctors can clearly observe the surgical site. These materials usually have excellent wear resistance and corrosion resistance, and can maintain stable performance during surgery. Various sensors, such as pressure sensors, temperature sensors, etc., are integrated on some endoscope end caps. These sensors can monitor various parameters of the surgical site in real time, providing doctors with more accurate surgical guidance. In the perfusion link of ureteroscopic surgery, it is difficult to achieve large-flow perfusion and uniform pressure. Summary of the invention

[0004] The invention overcomes the shortcomings of the prior art and provides a large-flow pressure and temperature measuring endoscope lens end shell.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a large-flow pressure-measuring and temperature-measuring endoscope lens end shell, comprising: a large-flow pressure-measuring and temperature-measuring endoscope lens end shell, comprising: an end shell body; the end shell body is provided with an instrument channel mounting hole and a camera module mounting hole, the instrument channel mounting hole and the camera module mounting hole pass through the end shell body; the proximal end of the end shell body is provided with a snake bone mounting bracket;

[0006] The end shell body is also provided with a sensor mounting hole; the sensor mounting hole passes through the end shell body, and the sensor mounting hole is used to mount the sensor assembly;

[0007] The sensor assembly includes a temperature sensor and a first pressure sensor;

[0008] The instrument channel mounting hole, the camera module mounting hole and the sensor mounting hole are opened along the axial direction of the end shell body, the instrument channel mounting hole is provided with an elliptical portion, and the radial cross-sectional area of ​​the instrument channel mounting hole is the same at the distal end and the proximal end.

[0009] In a preferred embodiment of the present invention, the dimensions of the cross section of the elliptical portion are: the major axis is 1.5 mm-2.0 mm, and the minor axis is 0.8 mm-1.4 mm.

[0010] In a preferred embodiment of the present invention, the radial cross-sectional area of ​​the instrument channel mounting hole (1) remains the same at the distal end and the proximal end.

[0011] In a preferred embodiment of the present invention, the instrument channel mounting hole forms a first opening at the distal end of the end shell body, and the camera module mounting hole forms a second opening at the distal end of the end shell body, and the angle formed by the planes where the first opening and the second opening are located is 190°-210°.

[0012] In a preferred embodiment of the present invention, the end shell body is provided with a left boss of the instrument channel mounting hole and a right boss of the instrument channel mounting hole, and the left boss of the instrument channel mounting hole and the right boss of the instrument channel mounting hole are used for mounting a second pressure sensor.

[0013] In a preferred embodiment of the present invention, a light source LED installation groove is opened at the proximal end of the end shell body, and the distance between the proximal end of the light source LED installation groove and the proximal end of the head end shell is 0.2 mm.

[0014] In a preferred embodiment of the present invention, the end shell body is provided with a left boss of an instrument channel mounting hole and a right boss of an instrument channel mounting hole, and the left boss of the instrument channel mounting hole and the right boss of the instrument channel mounting hole are used for mounting optical fibers.

[0015] In a preferred embodiment of the present invention, the end shell body is provided with a left boss of the instrument channel mounting hole and a right boss of the instrument channel mounting hole, and the left boss of the instrument channel mounting hole and the right boss of the instrument channel mounting hole are used for mounting a traction wire.

[0016] In a preferred embodiment of the present invention, the left boss of the instrument channel mounting hole and the right boss of the instrument channel mounting hole are symmetrically arranged on both sides of the instrument channel mounting hole.

[0017] In a preferred embodiment of the present invention, the snake-bone mounting bracket is provided with a snake-bone mounting bracket outer arm and a snake-bone mounting bracket inner liner.

[0018] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0019] (1) An elliptical instrument channel mounting hole and a camera module mounting hole are provided on the end shell body, a snake-bone mounting bracket is provided at the proximal end of the end shell body, a sensor mounting hole is opened on the end shell body, a sensor assembly is installed in the sensor mounting hole, and the radial cross-sectional area of ​​the instrument channel mounting hole is set to be the same at the distal end and the proximal end; compared with the prior art, irrigation by setting the instrument channel mounting hole can achieve a large flow rate and a more uniform pressure.

[0020] (2) By setting the cross-sectional dimensions of the instrument channel mounting hole to be 1.8 mm in the long axis and 1.2 mm in the short axis, the flow rate is larger and the pressure is more uniform compared to the prior art.

[0021] (3) The radial cross-sectional area of ​​the instrument channel installation hole is set to be the same at the distal end and the proximal end; compared with the prior art, the end shell body with the radial cross-sectional area of ​​the instrument channel installation hole being the same at the distal end and the proximal end has better fit.

[0022] (4) The end shell body is also provided with a sensor mounting hole, which passes through the end shell body. The sensor mounting hole is used to mount a sensor assembly, and the sensor assembly includes a temperature sensor and a first pressure sensor. Compared with the prior art, the temperature sensor and the first pressure sensor monitor the temperature and pressure of the endoscope working environment in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a front view of a preferred embodiment of the present invention;

[0025] Figure 2 is a rear view and a cross-sectional view of a preferred embodiment of the present invention;

[0026] Figure 3 is a side view of a preferred embodiment of the present invention;

[0027] Figure 4 is a three-dimensional structural diagram of a preferred embodiment of the present invention;

[0028] In the figure: 1. Instrument channel mounting hole; 11. Left boss of instrument channel mounting hole; 12. Right boss of instrument channel mounting hole; 13. Rear groove of instrument channel mounting hole; 15. Elliptical part; 2. Sensor mounting hole; 3. Camera module mounting hole; 4. Light source LED mounting groove; 5. Snake bone mounting bracket. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0033] like Figure 1 As shown, a large flow rate pressure measurement and temperature measurement endoscope lens end shell, comprising: a large flow rate pressure measurement and temperature measurement endoscope lens end shell, comprising: an end shell body; the end shell body is provided with an instrument channel mounting hole 1 and a camera module mounting hole 3, the instrument channel mounting hole 1 and the camera module mounting hole 3 pass through the end shell body; the proximal end of the end shell body is provided with a snake bone mounting bracket 5;

[0034] like Figure 4 As shown, further, Figure 2As shown, the serpentine mounting bracket 5 is provided with an outer arm of the serpentine mounting bracket 5 and an inner liner of the serpentine mounting bracket 5. Specifically, the serpentine mounting bracket 5 is used for connecting the head end shell and the serpentine, the outer arm of the serpentine mounting bracket 5 cooperates with the serpentine cutting groove to provide fixation, and the inner liner of the serpentine mounting bracket 5 is used to insert into the inner diameter of the serpentine to provide support.

[0035] The end shell body is also provided with a sensor installation hole 2; the sensor installation hole 2 passes through the end shell body, and the sensor installation hole 2 is used to install the sensor component;

[0036] The sensor assembly includes a temperature sensor and a first pressure sensor; specifically, the temperature sensor and the first pressure sensor monitor the temperature and pressure of the endoscope working environment in real time;

[0037] The instrument channel mounting hole, the camera module mounting hole and the sensor mounting hole are opened along the axial direction of the end shell body, the instrument channel mounting hole is provided with an elliptical portion 15, and the radial cross-sectional area of ​​the instrument channel mounting hole is the same at the distal end and the proximal end.

[0038] Specifically, the radial cross-sectional area of ​​the instrument channel mounting hole 1 remains the same at the distal end and the proximal end to ensure smooth movement of the instrument in the channel and to increase the irrigation volume.

[0039] Specifically, the proximal end is the end close to the operator, and the distal end is the end far from the operator and close to the surgical site.

[0040] Furthermore, the dimensions of the cross section of the elliptical portion 15 are as follows: the major axis is 1.5 mm-2.0 mm, and the minor axis is 0.8 mm-1.4 mm.

[0041] like Figure 2 As shown, further, the proximal end of the end shell body is provided with an instrument channel mounting hole rear groove 13, and the instrument channel mounting hole rear groove 13 is used for adding glue. Specifically, the instrument channel mounting hole rear groove 13 can adhere the instrument located in the instrument channel mounting hole 1 by adding glue.

[0042] Furthermore, a light source LED installation slot 4 is provided at the proximal end of the end shell body, and the distance between the proximal end of the light source LED installation slot 4 and the proximal end of the head end shell is 0.2 mm. Specifically, the precise distance of 0.2 mm is used to avoid physical interference between the LED light source and other internal components. Ensure that the LED light source has enough space for installation and heat dissipation, and will not collide or squeeze with other components;

[0043] The precise distance control of 0.2mm means that when installing the light source LED, it can be placed very accurately in the intended position. This high-precision positioning helps ensure the correct alignment between the LED light source and other optical components of the endoscope (such as lenses, optical fibers, etc.).

[0044] like Figure 3 As shown, further, the instrument channel mounting hole 1 forms a first opening at the distal end of the end shell body, and the camera module mounting hole 3 forms a second opening at the distal end of the end shell body, and the angle formed by the planes where the first opening and the second opening are located is 190°-210°.

[0045] Specifically, using an angle of 190°-210° can optimize the field of view and operating angle of the endoscope; when the angle between the camera module mounting hole 3 (i.e., the second opening) and the instrument channel mounting hole 1 (i.e., the first opening) is close to 190° to 210°, the camera module can capture a wider field of view. If a full 180° angle is used, it will be a complete side view. The design slightly larger than 180° here can provide a certain redundancy and flexibility, which helps to adapt to different surgical scenarios and instrument operations. By controlling the angle between 190° and 210°, doctors can more easily operate surgical instruments without interfering with the field of view of the camera module.

[0046] This design enables surgical instruments to be finely manipulated along or near the edge of the camera module's field of view while maintaining sufficient field of view clarity, helping doctors make accurate judgments and decisions during surgery.

[0047] The design of the angle also takes into account the viewing angle limitations of the camera module itself. By adjusting the angle, it can be ensured that the camera module can capture key areas around the instrument channel, thereby enhancing the visibility and safety of the operation.

[0048] Furthermore, the end shell body is provided with a left boss 11 of the instrument channel mounting hole and a right boss 12 of the instrument channel mounting hole, and the left boss 11 of the instrument channel mounting hole and the right boss 12 of the instrument channel mounting hole are used for mounting a second pressure sensor.

[0049] Specifically, during the perfusion process, the water flow may backflow and cause excessive local pressure, which may trigger a false alarm of the pressure sensor. By providing the instrument channel mounting hole left boss 11 and the instrument channel mounting hole right boss 12 on both sides of the instrument channel mounting hole 1, and installing a second pressure sensor, the pressure changes in the instrument channel can be monitored and recorded in real time. This design can more accurately determine whether the pressure is truly abnormal, thereby reducing the risk of misjudgment.

[0050] As another further embodiment of the above,

[0051] The end shell body is provided with a left boss 11 of an instrument channel mounting hole and a right boss 12 of an instrument channel mounting hole, and the left boss 11 of the instrument channel mounting hole and the right boss 12 of the instrument channel mounting hole are used for mounting optical fibers.

[0052] Specifically, the optical fiber installed here can serve as the second or third light source. In certain surgical operations, instruments may block the light and form shadows. The use of additional light sources can illuminate the dark areas in the surgical field and help doctors see the surgical site more clearly. By increasing the number and position of optical fibers, the impact of such shadows can be reduced, thereby improving the accuracy and safety of the operation.

[0053] As another further embodiment of the above;

[0054] The end shell body is provided with a left boss 11 of an instrument channel mounting hole and a right boss 12 of an instrument channel mounting hole, and the left boss 11 of the instrument channel mounting hole and the right boss 12 of the instrument channel mounting hole are used for mounting a traction wire.

[0055] Specifically, installing a traction wire here can control the swing angle of the head end to further improve the control over the front end of the end shell body, thereby improving the controllability and accuracy of the operation.

[0056] Furthermore, the left boss 11 of the instrument channel mounting hole and the right boss 12 of the instrument channel mounting hole are symmetrically arranged on both sides of the instrument channel mounting hole 1 .

[0057] Example 1

[0058] The instrument channel installation hole 1 is connected to a sheath tube, and irrigation liquid is introduced into the sheath tube. The flow rate of the irrigation liquid is calibrated using a flow measurement device. The end shell of the endoscope head is respectively connected to a constant pressure water source, a flow meter, and a pressure sensor array to ensure that the connection is tight and leak-free. A pressure pump is used to provide a stable irrigation pressure, and the sheath tube size is 4.0 mm.

[0059] The following are the criteria for judging the standard deviation of pressure distribution for patients:

[0060] The standard deviation of pressure distribution is ≤0.28. If the pressure is too small, it is difficult to achieve the desired effect.

[0061] 0.28≤pressure distribution standard deviation≤0.36, uniform pressure, easy for patients to feel comfortable;

[0062] The standard deviation of pressure distribution is greater than 0.36, indicating that the pressure is too high and the patient is prone to discomfort;

[0063] Experimental Example 1: The radial cross-sectional area of ​​the instrument channel mounting hole 1 at the distal end is equal to that at the proximal end, the cross-sectional dimensions of the elliptical portion 15 are 1.8 mm in major axis and 1.2 mm in minor axis, the angle formed by the planes where the first opening and the second opening are located is 190°, and the second pressure sensor is installed on the left boss 11 of the instrument channel mounting hole and the right boss 12 of the instrument channel mounting hole,

[0064] Comparative Example 1: Based on Experimental Example 1, the difference is that the size of the cross section of the elliptical portion 15 is 1.5 mm in the major axis and 0.4 mm in the minor axis.

[0065] Comparative Example 2: Based on Experimental Example 1, the difference is that the dimensions of the cross section of the elliptical portion 15 are 2.0 mm in the major axis and 1.4 mm in the minor axis.

[0066] Using Experimental Example 1, Comparative Example 1 and Comparative Example 2, the specific experimental data are shown in Table 1;

[0067]

[0068]

[0069] According to the data in Table 1, compared with Comparative Examples 1 and 2, observing the initial flow rate, stable flow rate, and data, it can be seen that the initial flow rate and stable flow rate of Experimental Example 1 are the highest, followed by Comparative Example 1, and finally Comparative Example 2; it shows that under the same experimental conditions, the channel of Experimental Example 1 can start irrigation faster and also show good flow growth characteristics; observing the average flow rate and total irrigation volume data, it can be seen that the average flow rate of Experimental Example 1 is the highest, followed by Comparative Example 1, and finally Comparative Example 2, indicating that under the same experimental conditions, the channel of Experimental Example 1 can provide a more stable and sufficient irrigation volume during continuous irrigation; according to the data in Table 1, compared with Comparative Examples 1 and 2, observing the average pressure and pressure distribution standard deviation data, it can be seen that the average pressure and pressure distribution standard deviation data of Experimental Example 1 are moderate, followed by Comparative Example 1 and Comparative Example 2; it shows that under the same experimental conditions, the pressure distribution in the channel of Experimental Example 1 is relatively uniform. The reason is that when the irrigation liquid is passed into the end shell body of Experimental Example 1, the flow rate of the irrigation liquid passing through is greater and the flow is more uniform. At the same time, the pressure distribution of the irrigation liquid through the end shell body of Experimental Example 1 is more uniform, which also increases the comfort of the patient.

[0070] Example 2

[0071] Clean and dry all the end shell bodies and sheaths to ensure that there are no impurities and moisture; use a microscope or high-precision measuring instrument to measure the size of each end shell body and sheath to ensure that they match each other; inject normal saline into the sheath to simulate the irrigation process during surgery; use a ruler to measure the movement distance of the sheath and record the sheath falling off in the end shell body to verify its fit. The sheath size is 4.0mm;

[0072] Comparative Example 3: Based on Experimental Example 1, the difference is that the radial cross-sectional area of ​​the instrument channel mounting hole at the distal end is not equal to that at the proximal end;

[0073] Using Experimental Example 1 and Comparative Example 3, the specific experimental data are shown in Table 1;

[0074] type Sheath moving distance (mm) Sheath fall-off Experimental Example 1 0.0 No shedding Experimental Example 1 0.0 No shedding Experimental Example 1 0.1 No shedding Experimental Example 1 0.05 No shedding Experimental Example 1 0.07 No shedding Comparative Example 3 0.2 No falling off but slight shaking Comparative Example 3 0.3 No falling off but obvious shaking Comparative Example 3 0.15 No falling off but slight shaking Comparative Example 3 0.25 No falling off but shaking intensified Comparative Example 3 0.35 Slight shedding

[0075] According to the data in Table 1, it can be concluded

[0076] When the present invention is used, compared with comparative example 3, the sheath tube of experimental example 1 moves a smaller distance and does not fall off, and the fit of experimental example 1 is better; the reason is that: there are crosslinks between molecular chains in the material of the end shell body or the sheath tube of experimental example 1, and crosslinking points are formed between them. These crosslinking points will enhance the network structure of the material, and there is a strong intermolecular interaction force on the surface energy. Their molecular chains are arranged tightly and orderly, further improving their strength and stability.

[0077] In summary, the cross-sectional dimensions of the instrument channel mounting hole in Experimental Example 1 are 1.8 mm in major axis and 1.2 mm in minor axis, the radial cross-sectional area of ​​the instrument channel mounting hole at the distal end is equal to the end shell body at the proximal end, the initial flow rate and the stable flow rate are the highest; the average pressure and the standard deviation of the pressure distribution are moderate; the sheath movement distance is small and there is no sheath falling off; it is concluded that the end shell body of Experimental Example 1 has a larger irrigation flow rate, a more uniform pressure, and a better fit with the sheath.

[0078] The above is based on the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A large flow pressure and temperature measuring endoscope head end shell, characterized in that: include: A large-flow pressure and temperature measuring endoscope lens end shell, comprising: an end shell body; the end shell body is provided with an instrument channel mounting hole (1) and a camera module mounting hole (3), the instrument channel mounting hole (1) and the camera module mounting hole (3) passing through the end shell body; a snake bone mounting bracket (5) is provided at the proximal end of the end shell body; The end shell body is also provided with a sensor mounting hole (2); the sensor mounting hole (2) passes through the end shell body, and the sensor mounting hole (2) is used to mount a sensor component; The sensor assembly includes a temperature sensor and a first pressure sensor; The instrument channel mounting hole (1), the camera module mounting hole (3) and the sensor mounting hole (2) are opened along the axial direction of the end shell body, the instrument channel mounting hole (1) is provided with an elliptical portion (15), and the radial cross-sectional area of ​​the instrument channel mounting hole (1) is the same at the distal end and the proximal end.

2. The large flow rate pressure and temperature measuring endoscope head end shell according to claim 1, characterized in that: The dimensions of the cross section of the elliptical portion (15) are as follows: the major axis is 1.5 mm to 2.0 mm, and the minor axis is 0.8 mm to 1.4 mm.

3. The large flow rate pressure and temperature measuring endoscope head end shell according to claim 1, characterized in that: The radial cross-sectional area of ​​the instrument channel mounting hole (1) remains the same at the distal end and the proximal end.

4. The large flow rate pressure and temperature measuring endoscope head end shell according to claim 1, characterized in that: The instrument channel mounting hole (1) forms a first opening at the distal end of the end shell body, and the camera module mounting hole (3) forms a second opening at the distal end of the end shell body. The angle formed by the planes where the first opening and the second opening are located is 190°-210°.

5. The large flow rate pressure and temperature measuring endoscope head end shell according to claim 1, characterized in that: The end shell body is provided with a left boss (11) of the instrument channel mounting hole and a right boss (12) of the instrument channel mounting hole, and the left boss (11) of the instrument channel mounting hole and the right boss (12) of the instrument channel mounting hole are used to mount a second pressure sensor.

6. The large flow rate pressure and temperature measuring endoscope head end shell according to claim 1, characterized in that: A light source LED installation groove (4) is provided at the proximal end of the end shell body, and the distance between the proximal end of the light source LED installation groove (4) and the proximal end of the head end shell is 0.2 mm.

7. The large flow rate pressure and temperature measuring endoscope head end shell according to claim 1, characterized in that: The end shell body is provided with a left boss (11) of the instrument channel mounting hole and a right boss (12) of the instrument channel mounting hole, and the left boss (11) of the instrument channel mounting hole and the right boss (12) of the instrument channel mounting hole are used for mounting optical fibers.

8. The large flow rate pressure and temperature measuring endoscope head end shell according to claim 1, characterized in that: The end shell body is provided with a left boss (11) of the instrument channel mounting hole and a right boss (12) of the instrument channel mounting hole, and the left boss (11) of the instrument channel mounting hole and the right boss (12) of the instrument channel mounting hole are used for mounting a traction wire.

9. A large flow rate pressure and temperature measuring endoscope head end shell according to claim 6, 7 or 8, characterized in that: The instrument channel mounting hole left boss (11) and the instrument channel mounting hole right boss (12) are symmetrically arranged on both sides of the instrument channel mounting hole (1).

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