CN214121286U

CN214121286U - High-speed rail sensor

Info

Publication number: CN214121286U
Application number: CN202120364852.4U
Authority: CN
Inventors: 李思华; 李桓戍
Original assignee: Tangzhi Science & Technology Hunan Development Co ltd
Current assignee: Tangzhi Science & Technology Hunan Development Co ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-09-03
Anticipated expiration: 2031-02-09

Abstract

The utility model discloses a high-speed railway sensor, include: the shell is internally provided with a sensing assembly, the bottom of the shell is provided with a detector, the sensing assembly is connected with a first signal wire, the detector is connected with a second signal wire, and the side surface of the shell is provided with a wire outlet structure for respectively leading out the first signal wire and the second signal wire. This application is through separately setting up detector and sensing component to through the signal output of first signal line with sensing component, through the signal output of second signal line with the detector, utilize same root cable output all signals relative prior art, mutual interference when having avoided temperature signal and vibration, shock signal output has promoted the accuracy of monitoring.

Description

High-speed rail sensor

Technical Field

The utility model relates to a track traffic technical field, more specifically say, relate to a high-speed railway sensor.

Background

The sensor needs to measure temperature and vibration impact signals, which are signals of two different types, the existing sensor leads the temperature signals to the circuit board, and finally the temperature signals and the vibration impact signals are transmitted by the same wire, so that the signals of the two different types are transmitted by the same cable, and interference is easily generated.

In summary, how to avoid mutual interference when outputting the temperature signal and the vibration and impact signal is a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a high-speed railway sensor, this high-speed railway sensor's detector and sensing component separately set up to through the signal output of first signal line with sensing component, through the signal output of second signal line with the detector, promoted temperature signal and vibration, the precision of impact signal output.

In order to achieve the above object, the present invention provides the following technical solutions:

a high-speed rail sensor, comprising: the casing, set up sensing assembly in the casing, the bottom of casing sets up the detector, sensing assembly connects first signal line, the second signal line is connected to the detector, the side of casing sets up derives respectively first signal line with the outlet structure of second signal line.

Preferably, the bottom of casing sets up first mounting hole, the lateral part of casing sets up the second mounting hole, the top of casing sets up the third mounting hole, the detector set up in the first mounting hole, sensing element set up in the third mounting hole, outlet structure set up in the second mounting hole, first mounting hole the second mounting hole reaches the third mounting hole communicates each other.

Preferably, fourth mounting holes are respectively arranged on two sides of the third mounting hole.

Preferably, a square inner cavity is arranged in the shell, and the first mounting hole, the second mounting hole and the third mounting hole are communicated with the square inner cavity.

Preferably, the sensing assembly comprises a PCB and a pressing plate assembly for press-fitting the PCB, the PCB is inserted into the third mounting hole, and the pressing plate assembly is pressed against the hole of the third mounting hole.

Preferably, first steps with upward steps are respectively arranged on two sides in the third mounting hole, two protrusions are arranged on two sides of the PCB, and the two protrusions are respectively pressed on the two first steps by the pressing plate assembly.

Preferably, the upper portion of the first step is provided with a second step with the step facing upward, the upper portion of the second step is provided with a third step with the step facing upward, the pressing plate assembly includes a first pressing plate and a second pressing plate, the first pressing plate is arranged on the second step and presses the two protrusions on the first step, and the second pressing plate is arranged on the third step and presses the first pressing plate on the second step.

Preferably, the second pressing plate is in interference fit with two side faces of the third step.

Preferably, the second press plate is welded to an outer edge of the third step.

Preferably, a wire passing groove is formed in the middle of the lower portion of the PCB, and the second signal wire passes through the wire passing groove.

Preferably, the detector is a probe, an upper boss of the probe is in interference fit with the first mounting hole, a temperature sensitive component is arranged in the bottom of the probe, and the temperature sensitive component is connected with the second signal line.

Preferably, an upper portion of the probe is soldered to the first mounting hole.

Preferably, the outlet structure includes the diplopore rubber buffer and compresses tightly the subassembly, the diplopore rubber buffer inserts in the second mounting hole, it compresses tightly the diplopore rubber buffer to compress tightly the subassembly, first signal line with the second signal line is followed respectively the diplopore rubber buffer passes and stretches into compress tightly in the subassembly.

Preferably, the compressing assembly comprises an embedded pipe, the front end of the embedded pipe is connected with the second mounting hole, a rubber hose is sleeved at the tail of the embedded pipe, and a compressing cover cap is sleeved outside the rubber hose.

Preferably, the periphery of the end part of the embedded pipe inserted in the rubber hose is provided with at least one annular anti-falling surface.

Preferably, each anti-falling surface is provided with at least one notch.

Preferably, all the notches of one anti-falling surface are arranged corresponding to all the notches of the other anti-falling surfaces.

Preferably, a fourth step is arranged in the second mounting hole, and the front end surface of the embedded pipe is mounted on the fourth step.

This application is through separately setting up detector and sensing component to through the signal output of first signal line with sensing component, through the signal output of second signal line with the detector, utilize same root cable output all signals relative prior art, mutual interference when having avoided temperature signal and vibration, shock signal output has promoted the accuracy of monitoring.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is an exploded view of a high-speed rail sensor provided by the present invention;

fig. 2 is an isometric view of a high-speed rail sensor provided by the present invention;

fig. 3 is a top view of a high-speed rail sensor provided by the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

fig. 5 is a schematic view illustrating the first pressing plate according to the present invention being disassembled;

fig. 6 is a schematic view of the PCB board mounted in the housing provided by the present invention;

fig. 7 is a position diagram of a first mounting hole provided by the present invention;

fig. 8 is a position view of a third mounting hole provided by the present invention;

fig. 9 is a position view of a second mounting hole provided by the present invention;

fig. 10 is a front view of a PCB board provided by the present invention.

In FIGS. 1-10:

1-second pressing plate, 2-first pressing plate, 3-PCB, 4-shell, 5-double-hole rubber plug, 6-embedded tube, 7-pressing cap, 8-rubber hose, 9-detector, 10-fourth mounting hole, 11-third mounting hole, 12-second mounting hole, 13-fourth order, 14-first mounting hole, 15-first order, 16-third order, 17-second order, 18-square inner cavity, 19-protrusion and 20-wire-passing groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a high-speed railway sensor, this high-speed railway sensor's detector and sensing component separately set up to through the signal output of first signal line with sensing component, through the signal output of second signal line with the detector, promoted temperature signal and vibration, impact signal output's precision.

Referring to fig. 1 to 10, a high-speed rail sensor includes: the shell 4 is provided with a sensing assembly in the shell 4, the bottom of the shell 4 is provided with a detector 9, the sensing assembly is connected with a first signal wire, the detector 9 is connected with a second signal wire, and the side surface of the shell 4 is provided with a wire outlet structure for respectively leading out the first signal wire and the second signal wire.

It should be noted that, the casing 4 is the cylindricality structure, and top surface and bottom surface are parallel plane, and top surface and bottom surface are connected through four sides, and wherein two relative sides are the parallel surfaces, and two other sides are outside convex arcwall face, and the inside of casing 4 sets up the inner chamber, and the structure of inner chamber can set up according to actual installation condition, and sensing component sets up in the inner chamber.

The sensing assembly is arranged in the shell 4, the bottom surface of the shell 4 is attached to the position to be detected, vibration and impact of the position to be detected are transmitted to the sensing assembly along the bottom surface of the shell 4, and the sensing assembly outputs vibration and impact signals along the first signal line. When the shell 4 is arranged at a position to be detected, the detector 9 at the bottom protrudes out of the shell 4 to extend into the position to be detected of the equipment to be monitored, the temperature of the position to be detected of the equipment to be monitored can be detected, and a temperature signal is output along the second signal line. The outlet structure is arranged on the side surface of the shell 4, and the first signal line and the second signal line are both fixed on the outlet structure and output along the outlet structure.

This application is through separately setting up detector 9 and sensing subassembly to through the signal output of first signal line with sensing subassembly, through the signal output of second signal line with detector 9, utilize same root cable output all signals relatively prior art, mutual interference when having avoided temperature signal and vibration, shock signal output has promoted the accuracy of monitoring.

On the basis of the above embodiment, as a further preferable mode, the bottom of the housing 4 is provided with a first mounting hole 14, the side of the housing 4 is provided with a second mounting hole 12, the top of the housing 4 is provided with a third mounting hole 11, the detector 9 is disposed in the first mounting hole 14, the sensing assembly is disposed in the third mounting hole 11, the wire outlet structure is disposed in the second mounting hole 12, and the first mounting hole 14, the second mounting hole 12 and the third mounting hole 11 are communicated with each other.

It should be noted that the first mounting hole 14 is a circular hole, the size of which matches with the shape of the top boss of the detector 9, the detector 9 is inserted through the first mounting hole 14, and the second signal line extends to the line outgoing structure in the second mounting hole 12 along the first mounting hole 14. The third mounting hole 11 is a T-shaped hole, the sensing assembly is mounted in a transverse hole of the T-shaped hole, the lower portion of a longitudinal hole of the T-shaped hole is communicated with the inner cavity to accommodate a first signal wire connected with the sensing assembly, and the first signal wire can extend to a wire outlet structure in the second mounting hole 12 along the lower portion of the longitudinal hole of the T-shaped hole. The housing 4 provided in this embodiment can respectively and stably mount the sensing component, the detector 9, and the wire outlet structure, and the internal structure of the housing 4 facilitates the extension of the first signal line and the second signal line.

In addition to the above embodiments, it is further preferable that the fourth mounting holes 10 are respectively provided on both sides of the third mounting hole 11.

It should be noted that, the fourth mounting hole 10 is a circular hole, and preferably can be set to a screw hole, and the fourth mounting hole 10 is set on the top surface of the housing, and is mounted on the position to be detected through a bolt, so that the mounting and dismounting are convenient. Preferably, the fourth mounting hole extends to the bottom surface of the housing to increase the connection length.

In addition to the above-described embodiment, it is further preferable that a square inner cavity 18 is provided in the housing 4, and the first mounting hole 14, the second mounting hole 12, and the third mounting hole 11 all communicate with the square inner cavity 18.

It should be noted that the square inner cavity 18 is a rectangular structure from bottom to top, the upper portion of the first mounting hole 14 is communicated with the square inner cavity 18, the inner side of the second mounting hole 12 is communicated with the square inner cavity 18, and the first signal line and the second signal line are both disposed in the square inner cavity 18 and both extend to the outgoing line structure along the square inner cavity 18.

On the basis of the above embodiment, as a further preferred, the sensing assembly includes a PCB board 3 and a pressing plate assembly for press-fitting the PCB board 3, the PCB board 3 is inserted into the third mounting hole 11, and the pressing plate assembly is pressed against the opening of the third mounting hole 11.

It should be noted that, the PCB 3 is inserted downwards along the transverse hole of the third mounting hole 11, the pressing plate assembly compresses the PCB 3 in the third mounting hole 11, the first signal line is arranged in the longitudinal hole of the third mounting hole 11 and connected with the PCB 3, after the pressing plate assembly is compressed, the outer surface is flush with the end surface of the third mounting hole 11, so that after the housing is mounted, the vibration and the impact of the position to be detected can be transmitted to the sensing assembly by being attached to the housing, and the detection precision is high.

On the basis of the above embodiment, as a further preferred option, the first steps 15 with the upward steps are respectively arranged on two sides in the third mounting hole 11, the two protrusions 19 are arranged on two sides of the PCB 3, and the two protrusions 19 are respectively pressed on the two first steps 15 by the pressing plate assembly.

It should be noted that the side surface of the upper portion of the first step 15 is recessed towards both sides, the two protrusions 19 are installed into the two recesses along the top, the two protrusions 19 are respectively pressed on the two first steps 15, the inner side surface of the pressing plate assembly presses the two protrusions 19 and the PCB 3, and the outer side surface and the top surface of the housing are in the same plane. This embodiment sets up first step 15 in third mounting hole 11, utilizes the sunken block effect of two archs 19 of PCB board 3 both sides and first step 15 lower part can stably install PCB board 3, avoids PCB board 3 to receive vibrations the back not hard up, promotes and detects the precision.

On the basis of the above embodiment, as a further preferred, the upper portion of the first step 15 is provided with a second step 17 facing upward, the upper portion of the second step 17 is provided with a third step 16 facing upward, the pressing plate assembly includes a first pressing plate 2 and a second pressing plate 1, the first pressing plate 2 is arranged on the second step 17 and presses the two protrusions 19 against the first step 15, and the second pressing plate 1 is arranged on the third step 16 and presses the first pressing plate 2 against the second step 17.

It should be noted that, the step surfaces of the first step 15, the second step 17 and the third step 16 are all arranged upward, the side surfaces of the first step 15, the second step 17 and the third step 16 are all recessed towards both sides, the shapes of both ends of the first pressing plate 2 are consistent with the recessed shapes of both sides of the second step 17, after the first pressing plate 2 is installed, both ends are clamped into the recessed outside the second step 17, the inner side surface is adhered to the PCB 3 to be pressed, the shapes of both ends of the second pressing plate 1 are consistent with the recessed shapes of both sides of the third step 16, after the second pressing plate 1 is installed, both ends are clamped into the recessed outside the third step 16, the inner side surface is adhered to the outer side surface of the first pressing plate 2 to be pressed, and the outer side surface is flush with the top end surface of the housing.

In order to stably mount the second pressing plate 1, the second pressing plate 1 is in interference fit with two side surfaces of the third step 16, so that the second pressing plate 1 cannot easily fall off after being mounted. In order to further stabilize the installation of second clamp plate 1, second clamp plate 1 welds in the outer edge of third step 16, and second clamp plate 1 welds the back, can promote the leakproofness between second clamp plate 1 and the third step 16, has avoided inside factors such as outside vapor, dust to get into the shell.

In order to facilitate the extension of the second signal line, a wire passing groove 20 is disposed in the middle of the lower portion of the PCB 3, and the second signal line passes along the wire passing groove 20. The second signal line extends to the inside of the shell 4 along the first mounting hole 14, the first mounting hole 14 is communicated with the third mounting hole 11, and in order to prevent the second signal line from being extruded downwards after the PCB 3 is mounted, the second signal line is positioned in the line passing groove 20, so that the size of the shell 4 is reduced, and the second signal line can be prevented from being extruded by the PCB.

In addition to the above embodiments, it is further preferable that the probe 9 is a probe, and an upper boss of the probe is in interference fit with the first mounting hole 14.

It should be noted that a temperature sensitive device is arranged in the end portion of the probe, and can monitor the temperature of the device to be detected, generate a temperature signal after detection, and transmit the temperature signal through the second signal line. The upper boss of probe and first mounting hole 14 interference fit, the installation that can stabilize the probe avoids the probe to drop.

When the high-speed rail sensor is installed, 3 mounting holes are preset in a position to be detected, and the 3 mounting holes are respectively matched with the probe and the fourth mounting hole 10 for use. During installation, the probe extends into one of the installation holes and is used for monitoring the temperature of the equipment to be detected; the bottom surface of the shell 4 is attached to the position to be detected of the device to be monitored, the mounting screws extend into the fourth mounting hole 10 and the remaining 2 preset mounting holes of the position to be detected, and the shell 4 is fixed to the position to be detected of the device to be monitored.

In order to further stabilize the installation of the probe, the upper part of the probe is welded to the outer edge of the first installation hole 14, and after welding, moisture, dust and other factors outside can be ensured to enter the inside of the casing along the first installation hole 14.

On the basis of above-mentioned embodiment, as further preferred, outlet structure includes diplopore rubber buffer 5 and compresses tightly the subassembly, and diplopore rubber buffer 5 inserts in second mounting hole 12, compresses tightly subassembly and compresses tightly diplopore rubber buffer 5, and first signal line and second signal line pass and stretch into respectively along diplopore rubber buffer 5 and compress tightly the subassembly in.

It should be noted that two through holes are arranged on the upper edge of the double-hole rubber plug 5, the two through holes are transversely arranged, the two through holes are arranged up and down, the first signal line extends out along the through hole on the upper part, the second signal line extends out along the through hole on the lower part, the compression assembly compresses the double-hole rubber plug 5 in the axial direction, the deformation amount of the double-hole rubber plug 5 is changed, and the compression assembly is connected with the second mounting hole 12, so that the mounting stability and the sealing performance of the double-hole rubber plug 5 are improved.

On the basis of the above embodiment, as a further preference, the pressing component comprises an embedded tube 6, the tail part of the embedded tube 6 is sleeved with a rubber hose 8, and the outer part of the rubber hose 8 is sleeved with a pressing cap 7.

It should be noted that the front end of the embedded pipe 6 is connected with the second mounting hole 12, the embedded pipe 6 is a hard pipe to prevent the front end from easily shaking, the tail part is sleeved with the rubber hose 8, the first signal line and the second signal line both extend into the rubber hose 8 along the embedded pipe 6, and the rubber hose 8 can be bent to change the extending direction of the first signal line and the second signal line, so that the embedded pipe is conveniently connected with a host. The pressing cap 7 presses the rubber hose 8 on the embedded pipe 6 to improve the sealing and tensile properties of the rubber hose 8.

In addition to the above-described embodiment, it is further preferable that the outer periphery of the end portion of the insert tube 6 inserted into the rubber hose 8 is provided with at least one annular anti-coming-out surface.

It should be noted that the anti-coming-out surfaces are disposed around the periphery of the pipe insert 6, the anti-coming-out surfaces protrude from the periphery of the pipe insert 6, and when more than two anti-coming-out surfaces are disposed, all the anti-coming-out surfaces are arranged in the axial direction of the pipe insert 6. After 8 suit in the anticreep play face at rubber hose, rubber hose 8 can be strutted by the anticreep play face to increase the pressure between rubber hose 8 and the anticreep play face, thereby increase frictional force, can prevent 8 and the 6 axial motion of pipe that inlay of rubber hose, guarantee the stability that rubber hose 8 and the pipe 6 are connected of inlaying.

In addition to the above embodiments, it is further preferable that each of the anti-coming-out surfaces is provided with at least one notch.

It should be noted that, the breach makes the anticreep face of anticreep for the annular anticreep face of non-closure, in practical application, because sensor operational environment's complexity, lead to rubber hose 8 can be cooled or thermal deformation, can produce the clearance between rubber hose 8 and the anticreep face, lead to rubber hose 8 can and inlay and take place relative rotation between the pipe 6, all be equipped with the breach on all anticreep faces even rubber hose 8 takes place deformation and also can prevent rubber hose 8 and anticreep face and take place relative rotation, make the connection between pipe 6 and the rubber hose 8 more stable.

In addition to the above-described embodiments, it is further preferable that all the notches of one anti-coming-off surface are provided corresponding to all the notches of all the other anti-coming-off surfaces.

All the notches can be machined by a milling cutter, so that all the notches of one anti-falling surface are arranged corresponding to all the notches of the other anti-falling surface. Can make a breach of an anticreep face and the breach of another anticreep face at collinear, can reduce the processing degree of difficulty, improve work efficiency.

In addition to the above embodiment, it is further preferable that a fourth step 13 is provided in the second mounting hole 12, and the distal end surface of the insert pipe 6 is mounted to the fourth step 13.

It should be noted that the front end of the tube nest 6 is provided with an annular protrusion, the front end face of the annular protrusion is attached to the fourth step 13, the periphery of the annular protrusion is in interference fit with the side face of the fourth step 13 to improve the installation stability of the tube nest 6, and after installation, the annular protrusion and the four faces of the fourth step 13 can be welded to improve the sealing performance inside the housing.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The high-speed rail sensor provided by the utility model is described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A high-speed rail sensor, comprising: casing (4), set up sensing assembly in casing (4), the bottom of casing (4) sets up detector (9), first signal line is connected to sensing assembly, second signal line is connected in detector (9), the side setting of casing (4) is derived respectively first signal line with the outlet structure of second signal line.

2. The high-speed rail sensor according to claim 1, wherein a first mounting hole (14) is formed in the bottom of the housing (4), a second mounting hole (12) is formed in the side of the housing (4), a third mounting hole (11) is formed in the top of the housing (4), the detector (9) is arranged in the first mounting hole (14), the sensing assembly is arranged in the third mounting hole (11), the wire outlet structure is arranged in the second mounting hole (12), and the first mounting hole (14), the second mounting hole (12) and the third mounting hole (11) are communicated with each other.

3. A high speed rail sensor according to claim 2, wherein fourth mounting holes (10) are provided on both sides of the third mounting hole (11), respectively.

4. A high speed rail sensor according to claim 2, wherein a square internal cavity (18) is provided in the housing (4), and the first mounting hole (14), the second mounting hole (12) and the third mounting hole (11) are all in communication with the square internal cavity (18).

5. A high-speed rail sensor according to claim 2, wherein the sensing assembly comprises a PCB (3) and a pressing plate assembly for press-fitting the PCB (3), the PCB (3) is inserted into the third mounting hole (11), and the pressing plate assembly is pressed against the opening of the third mounting hole (11).

6. A high-speed rail sensor according to claim 5, wherein the third mounting hole (11) is internally provided with first steps (15) with upward steps at two sides respectively, the PCB (3) is provided with two protrusions (19) at two sides, and the pressure plate assembly presses the two protrusions (19) onto the two first steps (15) respectively.

7. The high-speed rail sensor according to claim 6, wherein the upper portion of the first step (15) is provided with a second step (17) facing upward, the upper portion of the second step (17) is provided with a third step (16) facing upward, the platen assembly comprises a first platen (2) and a second platen (1), the first platen (2) is provided on the second step (17) and presses the two protrusions (19) against the first step (15), and the second platen (1) is provided on the third step (16) and presses the first platen (2) against the second step (17).

8. A high speed rail sensor according to claim 7, wherein the second pressure plate (1) is an interference fit with both sides of the third step (16).

9. A high-speed rail sensor according to claim 8, characterized in that the second pressure plate (1) is welded to the outer edge of the third step (16).

10. A high-speed rail sensor according to claim 5, wherein a wire passing groove (20) is provided in the middle of the lower portion of the PCB board (3), and the second signal wire passes along the wire passing groove (20).

11. The high-speed rail sensor according to claim 2, wherein the detector (9) is a probe, an upper boss of the probe is in interference fit with the first mounting hole (14), a temperature sensitive component is arranged in the bottom of the probe, and the temperature sensitive component is connected with the second signal wire.

12. A high speed rail sensor according to claim 11, wherein the upper part of the probe is welded to the first mounting hole (14).

13. The high-speed rail sensor according to any one of claims 2 to 12, wherein the outlet structure comprises a double-hole rubber plug (5) and a pressing assembly, the double-hole rubber plug (5) is inserted into the second mounting hole (12), the pressing assembly presses the double-hole rubber plug (5), and the first signal line and the second signal line respectively pass through the double-hole rubber plug (5) and extend into the pressing assembly.

14. The high-speed rail sensor according to claim 13, wherein the compression assembly comprises an embedded pipe (6), the front end of the embedded pipe (6) is connected with the second mounting hole (12), a rubber hose (8) is sleeved on the tail part of the embedded pipe (6), and a compression cap (7) is sleeved on the outer part of the rubber hose (8).

15. Sensor according to claim 14, characterised in that the end of the tube insert (6) inserted into the rubber tube (8) is provided on its periphery with at least one annular anti-extraction surface.

16. The sensor of claim 15, wherein each of the anti-pop-out faces is provided with at least one notch.

17. The sensor of claim 16, wherein all of the indentations of one of the anti-pop-off surfaces are disposed in correspondence with all of the indentations of the remaining all of the anti-pop-off surfaces.

18. A sensor according to claim 16, wherein a fourth step (13) is provided in the second mounting hole (12), and a front end face of the insertion tube (6) is mounted to the fourth step (13).