JP2013036858A - Foreign matter detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foreign matter detection device capable of constructing a waterproof structure of a sensor body even while suppressing increase of the number of components.SOLUTION: A pressure-sensitive sensor 11 comprises: a sensor line 21 which is formed in a long length and detects presence of a foreign matter by receiving external force from the foreign matter; a cylinder part 51 which forms an elastically deformable long-length cylindrical shape and houses the sensor line 21 inside; a sealing part 52 which seals an opening 51b of a longitudinal end part 51a of the cylinder part 51; and a protector member 40 which is formed by integrally molding a connection part 53 that connects the sealing part 52 and the cylinder part 51.

Description

  The present invention relates to a foreign object detection device.

  Conventionally, in an electric sliding door device that moves a door panel electrically by a driving force of a motor or the like, in order to prevent foreign matter from being caught between the peripheral portion of the vehicle entrance / exit and the door panel, the peripheral portion of the entrance / exit Some include a foreign object detection device that detects foreign objects existing between the door panel and the door panel. For example, as shown in Patent Document 1, such a foreign object detection device is formed in a long shape and detects the presence of the foreign object by receiving an external force from the foreign object, and a length that accommodates the sensor main body therein. A scale-shaped cylindrical portion. The opening at the end in the longitudinal direction of the cylindrical portion is sealed by a sealing member, thereby waterproofing the sensor body.

JP 2006-210011 A

  However, in the foreign object detection device as described in Patent Document 1, since the sealing member is separately provided, the number of parts is increased and complicated, resulting in an increase in manufacturing cost.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a foreign object detection device capable of constructing a waterproof structure of a sensor body while suppressing an increase in the number of parts. .

  In order to solve the above-mentioned problem, the invention described in claim 1 includes a sensor body that is formed in a long shape and detects at least one of pressure from the foreign matter and proximity of the foreign matter, and a long cylindrical shape that is elastically deformable. None. A cylindrical part that accommodates the sensor body therein, a sealing part that seals the opening at the longitudinal end of the cylindrical part, and a connecting part that connects the sealing part and the cylindrical part are integrally formed. And a sensor main body protection member.

  According to the present invention, the opening of the end portion in the longitudinal direction of the cylindrical portion of the sensor main body protection member is sealed by the sealing portion, and the waterproof protection of the sensor main body housed in the cylindrical portion is made. And since a cylinder part, a sealing part, and the connection part which connects them are comprised as an integrally formed integral part, it is a part with respect to the structure which uses a cylinder part and a sealing part as separate separate members, respectively. The increase in points can be suppressed.

  According to a second aspect of the present invention, in the foreign matter detection device according to the first aspect, the sealing portion is fitted into the opening of the cylindrical portion, and an outer diameter dimension of the sealing portion is The opening is sealed by being formed larger than the inner diameter of the opening, and the outer peripheral surface of the sealing portion is in close contact with the inner peripheral surface of the cylindrical portion.

  In this invention, since the outer diameter dimension of the sealing portion is formed larger than the inner diameter dimension of the opening of the cylindrical portion, the outer peripheral surface of the sealing portion is in close contact with the inner peripheral surface of the cylindrical portion. The sealing property of the opening is sufficiently ensured, and the sealing portion can be made difficult to come off from the opening of the cylindrical portion.

  According to a third aspect of the present invention, in the foreign matter detection device according to the first or second aspect, the sealing portion is fitted into the opening of the cylindrical portion, and from a longitudinal end portion of the cylindrical portion. Is also fitted to the center side.

  In this invention, since the sealing part is fitted to the center side rather than the longitudinal direction end part of the cylinder part, the longitudinal direction end part of the cylinder part protrudes in the longitudinal direction from the sealing part. The sealing part can be made difficult to come off by the force of.

  According to a fourth aspect of the present invention, in the foreign object detection device according to any one of the first to third aspects, the sealing portion is fitted into the opening of the cylindrical portion, and the connection The part is arranged in a notch part formed by notching part of the longitudinal end of the cylindrical part.

  In this invention, since the connecting portion can be arranged in the cutout portion of the cylindrical portion so that the connecting portion does not protrude in the longitudinal direction from the longitudinal end portion of the cylindrical portion, the hooking between the connecting portion and the outside is prevented. It can suppress and can make it difficult to remove a sealing part from opening of a cylinder part.

  According to a fifth aspect of the present invention, in the foreign matter detection device according to any one of the first to fourth aspects, the sealing portion is fitted into the opening of the cylindrical portion, and the sealing The longitudinal end surface of the cylindrical portion on the side where the stop portion is mounted is an inclined surface that inclines toward the central side in the longitudinal direction as it is separated from the connecting portion in the radial direction.

  In this invention, when the sealing portion is fitted into the opening at the end portion in the longitudinal direction of the cylindrical portion, the sealing portion is less likely to interfere with the longitudinal end portion of the cylindrical portion. It can be easily fitted into the opening.

  Therefore, according to the above described invention, it is possible to construct a waterproof structure of the sensor body while suppressing an increase in the number of parts.

Schematic of the vehicle provided with the electric sliding door apparatus. The block diagram which shows the electric constitution of an electric slide door apparatus. Sectional drawing which shows the longitudinal direction edge part of a sensor main body protection member. The perspective view of the longitudinal direction edge part of the sensor main body protection member of the state which has not sealed opening. Sectional drawing which shows the longitudinal direction edge part of the sensor main body protection member of another example.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIG. 1, a vehicle 2 equipped with an electric slide door device 1 includes a vehicle body 3 made of a conductive metal material, and a rectangular entrance 4 is formed on the left side surface of the vehicle body 3. ing. The entrance / exit 4 is opened / closed by a door panel 5 made of a conductive metal material and having a rectangular shape corresponding to the entrance / exit 4.

  The door panel 5 is attached to the vehicle body 3 so as to be slidable in the front-rear direction of the vehicle 2. The door panel 5 is connected to a drive mechanism (not shown) provided with a slide actuator 6 (see FIG. 2) disposed on the vehicle body 3 side. When the slide actuator 6 is driven, the door panel 5 is attached to the vehicle. 2 is slid in the front-rear direction and is opened and closed.

  As shown in FIG. 2, the slide actuator 6 includes a slide motor 7 and a speed reduction mechanism (not shown) that decelerates and outputs the rotation of the slide motor 7. A position detection device 8 that detects the rotation of the slide motor 7 is disposed in the slide actuator 6. The position detection device 8 is, for example, a permanent magnet provided so as to rotate integrally with a rotation shaft (not shown) of the slide motor 7 or a reduction gear (not shown) constituting the reduction mechanism, and opposed to the permanent magnet. Hall IC (not shown). And Hall IC outputs the pulse signal according to the change of the magnetic field of this permanent magnet by rotation of a permanent magnet as a position detection signal.

  The electric sliding door device 1 includes an operation switch 9 for instructing opening / closing of the door panel 5. As shown in FIGS. 1 and 2, when the operation switch 9 is operated by a passenger or the like of the vehicle 2 to open the entrance / exit 4, the door panel 5 is slid to open the entrance / exit 4. An open signal is output. On the other hand, when the operation switch 9 is operated by a passenger or the like so as to close the entrance / exit 4, the operation switch 9 outputs a closing signal for sliding the door panel 5 so as to close the entrance / exit 4. The operation switch 9 is provided at a predetermined location (such as a dashboard) in the passenger compartment, a door lever 5b of the door panel 5, a carry-on item (not shown) carried along with the ignition key, and the like.

  Moreover, the electric slide door device 1 includes a pressure sensor 11 as a foreign matter detection device for detecting the foreign matter X (see FIG. 1) existing between the front end portion 5 a of the door panel 5 and the peripheral edge portion of the entrance / exit 4. I have. As shown in FIG. 1, the pressure-sensitive sensor 11 includes a sensor wire 21 (sensor body) having a long cable shape, and a resin protector member 40 (sensor body protection member) that covers and protects the outer periphery of the sensor wire 21. ). The sensor wire 21 includes a pair of electrode wires 23 and 24 (see FIG. 2) inside a hollow insulator 22 (see FIG. 3) that is substantially cylindrical and elastically deformable. The pair of electrode wires 23 and 24 are arranged to be spaced apart from each other in the circumferential direction inside the hollow insulator 22, and the power supply connector 31 attached to one end portion in the longitudinal direction (lower end portion in FIG. 1) of the sensor wire 21. Electrically connected. The power supply connector 31 is configured to enter the inside of the panel from the front end portion 5a of the door panel 5, and is connected to an external connector (not shown) of the control unit 41 disposed in the door panel 5. Yes.

The protector member 40 has a long cylindrical portion 51 that can be elastically deformed and accommodates the sensor wire 21 therein. The cylindrical portion 51 is fixed to the front end portion 5 a of the door panel 5.
As shown in FIG. 3, a sealing portion 52 formed integrally with the cylindrical portion 51 is fitted into an opening 51 b of a longitudinal end portion 51 a (upper end portion in FIG. 1) of the cylindrical portion 51. The sealing part 52 is connected to the cylinder part 51 via a connection part 53 extending from the outer peripheral surface of the cylinder part 51. That is, the cylinder part 51, the sealing part 52, and the connection part 53 are united. Thus, the protector member 40 is made of the same member (for example, elastomer) at least in the vicinity of the longitudinal end 51a, and the longitudinal end 51a, the connecting portion 53, and the sealing portion 52 of the cylindrical portion 51 are the same member. It consists of

  The sealing part 52 has a substantially columnar shape, and is connected to the connecting part 53 at the upper end part in FIG. A circular deformation allowing hole 52b extending from the insertion side end portion 52a in the longitudinal direction to the middle portion in the longitudinal direction is formed at the center of the sealing portion 52. Further, an annular convex portion 52 c is formed on the outer peripheral surface of the sealing portion 52 over the entire circumferential direction. In addition, the convex part 52c is formed in the position which overlaps with the deformation | transformation permission hole 52b in a longitudinal direction. Moreover, the corner | angular part of the insertion side edge part 52a of the sealing part 52 is chamfered, and the insertion to the opening 51b is easy.

  As shown in FIGS. 3 and 4, a rectangular notch 54 is formed at the longitudinal end 51 a of the cylinder 51. In a state where the sealing portion 52 is fitted in the opening 51 b of the cylindrical portion 51 (see FIG. 3), the connecting portion 53 is folded and enters the cutout portion 54. Accordingly, the connecting portion 53 is configured not to protrude outward in the longitudinal direction from the longitudinal end portion 51a of the cylindrical portion 51. Therefore, the sealing portion 52 is prevented from being caught from the opening 51b by suppressing the catch between the connecting portion 53 and the outside. It is prevented from coming off.

  When the pressure sensitive sensor 11 is assembled, first, the sensor wire 21 is inserted and arranged inside the cylindrical portion 51. Thereafter, the sealing portion 52 is fitted into the opening 51 b of the longitudinal end portion 51 a of the cylindrical portion 51. Here, the outer diameter D2 of the sealing portion 52 is set larger than the inner diameter D1 of the opening 51b of the cylindrical portion 51. For this reason, the outer peripheral surface of the sealing portion 52 is in close contact with the inner peripheral surface of the cylindrical portion 51 in the fitted state. As a result, the sealing performance of the opening 51b of the cylindrical portion 51 is sufficiently ensured, and the sealing portion 52 is difficult to come off from the opening 51b. Moreover, the convex part 52c of the outer peripheral surface of the sealing part 52 increases the adhesion pressure between the sealing part 52 and the inner peripheral surface of the cylindrical part 51, and the sealing performance is improved. In addition, when the sealing portion 52 is fitted, the deformation allowing hole 52b formed at the center of the sealing portion 52 allows elastic deformation of the sealing portion 52 inward in the radial direction. The load at the time of inserting in the cylinder part 51 is reduced. Further, the sealing portion 52 is fitted to the center side with respect to the longitudinal direction end portion 51 a of the cylindrical portion 51, and as a result, the longitudinal direction end portion 51 a of the cylindrical portion 51 becomes the longitudinal direction end portion of the sealing portion 52 ( It is a non-insertion side edge part, Comprising: It protrudes in the longitudinal direction outer side from the upper end part in FIG.

  Thus, in the protector member 40 of this embodiment, since the opening 51b of the longitudinal direction edge part 51a of the cylinder part 51 is sealed by the sealing part 52, infiltration of rain water etc. into the cylinder part 51 from the opening 51b Is to be suppressed.

  As shown in FIG. 2, the control unit 41 includes an energization detection unit 42 and a door ECU 43 electrically connected to the energization detection unit 42. The sensor wire 21 of the pressure-sensitive sensor 11 is connected to the control unit 41 via the power supply connector 31 and the external connector, whereby the electrode wire 23 is electrically connected to the energization detection unit 42 and the electrode The line 24 is connected to the ground GND (that is, grounded to the vehicle body 3). The energization detection unit 42 supplies current to the electrode wires 23 and 24, and in a normal state where no pressing force is applied to the sensor wire 21, the current supplied from the energization detection unit 42 to the electrode wire 23 is the resistance 36. It flows to the electrode line 24 via (diag resistance).

  On the other hand, when a pressing force that crushes the sensor wire 21 in the diametrical direction is applied, the hollow insulator 22 in the portion where the pressing force is applied is elastically deformed and the electrode wire 23 is accompanied by the elastic deformation of the hollow insulator 22. 24 are bent, and the electrode wire 23 and the electrode wire 24 come into contact with each other and are short-circuited. Then, the current supplied from the energization detection unit 42 to the electrode wire 23 flows through the electrode wire 24 without passing through the resistor 36. Therefore, for example, when a current is supplied to the electrode wire 23 at a constant voltage, the current value changes. Therefore, the energization detection unit 42 detects the change in the current value at this time, thereby It detects that a pressing force has been applied. And when the energization detection part 42 detects the change of this electric current value, it outputs a pressure-sensitive signal to door ECU43. When the pressing force on the sensor wire 21 is removed, the hollow insulator 22 is restored, and the electrode wires 23 and 24 are also restored and become non-conductive.

  The door ECU 43 includes a ROM (Read only Memory), a RAM (Random access Memory), and the like and has a function as a microcomputer, and is supplied with power from a battery (not shown) of the vehicle 2. The door ECU 43 controls the slide actuator 6 based on various signals input from the operation switch 9, the position detection device 8, the energization detection unit 42, and the like.

Next, the operation of the electric sliding door device 1 configured as described above will be comprehensively described with reference to FIGS. 1 and 2.
When an open signal is input from the operation switch 9, the door ECU 43 drives the slide actuator 6 to open the door panel 5. The door ECU 43 recognizes the position of the door panel 5 based on the position detection signal input from the position detection device 8. In the present embodiment, the door ECU 43 counts the number of pulses of the position detection signal and recognizes the position of the door panel 5 based on the count value. And if the door panel 5 is arrange | positioned in the full open position Po which opens the entrance / exit 4 completely, door ECU43 will stop the slide actuator 6. FIG.

  On the other hand, when a close signal is input from the operation switch 9, the door ECU 43 drives the slide actuator 6 to close the door panel 5. When the door panel 5 is disposed at the fully closed position Pc where the doorway 4 is completely closed, the door ECU 43 stops the slide actuator 6. When the foreign matter X comes into contact with the sensor wire 21 arranged at the front end portion 5a of the door panel 5 and a pressing force is applied to the sensor wire 21 during the closing operation of the door panel 5, the hollow insulator 22 in the sensor wire 21 is applied. Is elastically deformed, the pair of electrode wires 23 and 24 come into contact with each other and are short-circuited. As a result, since the current value of the current supplied to the electrode wire 23 is changed, the energization detection unit 42 outputs a pressure sensitive signal to the door ECU 43. When the pressure-sensitive signal is input, the door ECU 43 reverses the slide actuator 6 to open the door panel 5 by a predetermined distance and then stops the slide actuator 6.

Next, characteristic effects of the present embodiment will be described.
(1) The pressure-sensitive sensor 11 is formed in a long shape and receives an external force from the foreign matter X to detect the presence of the foreign matter X. The sensor wire 21 has a long cylindrical shape that can be elastically deformed. A cylindrical portion 51 accommodated inside, a sealing portion 52 that seals the opening 51b of the longitudinal end 51a of the cylindrical portion 51, and a connecting portion 53 that connects the sealing portion 52 and the cylindrical portion 51. And a protector member 40 formed integrally. Thereby, in the protector member 40, the opening 51b of the longitudinal direction end part 51a of the cylinder part 51 is sealed by the sealing part 52, and the protection protection of the sensor wire 21 accommodated in the cylinder part 51 is made. And since the cylinder part 51, the sealing part 52, and the connection part 53 which connects them are comprised as an integrally formed integral part, the cylinder part 51 and the sealing part 52 are used as separate members that are independent of each other. An increase in the number of parts can be suppressed with respect to the configuration. Moreover, in this structure, since the cylinder part 51 and the sealing part 52 can be comprised with the same member, even if the cylinder part 51 and the sealing part 52 produce expansion | swelling or shrinkage | contraction by heat, it becomes difficult to produce a clearance gap between them. be able to. Moreover, by making the material of the longitudinal direction end part 51a of the protector member 40 into an elastomer, a suitable frictional force is generated between the cylindrical part 51 and the sealing part 52, whereby the sealing part 52 is removed from the opening 51b. It becomes possible to make it difficult to come off.

  (2) The sealing part 52 is fitted into the opening 51b of the cylindrical part 51, and the outer diameter D2 of the sealing part 52 is formed larger than the inner diameter D1 of the opening 51b. The opening 51 b is sealed when the outer peripheral surface of 52 is in close contact with the inner peripheral surface of the cylindrical portion 51. For this reason, the sealing property of the opening 51b of the cylinder part 51 is sufficiently ensured, and the sealing part 52 can be made difficult to come off from the opening 51b of the cylinder part 51.

  (3) Since the sealing portion 52 is fitted into the opening 51b of the cylindrical portion 51 and is fitted to the center side of the longitudinal direction end portion 51a of the cylindrical portion 51, the longitudinal end portion 51a of the cylindrical portion 51 is It becomes the structure which protrudes in a longitudinal direction rather than the sealing part 52, As a result, it can make it difficult to remove the sealing part 52 with the force from the outside.

  (4) The sealing portion 52 is fitted into the opening 51 b of the cylindrical portion 51, and the connecting portion 53 is a notched portion formed by partially notching the longitudinal end portion 51 a of the cylindrical portion 51. 54, the connecting portion 53 can be configured not to protrude in the longitudinal direction from the longitudinal end portion 51a of the tubular portion 51. As a result, the tubular portion 51 can be prevented from being caught between the connecting portion 53 and the outside. It is possible to make it difficult to remove the sealing portion 52 from the opening 51b.

  (5) Since the deformation allowable hole 52b extending in the longitudinal direction from the insertion side end 52a of the sealing portion 52 is formed at the center of the sealing portion 52, the sealing portion 52 is cylindrically formed by the deformation allowable hole 52b. Elastic deformation to the inside in the radial direction of the sealing portion 52 when inserted into the portion 51 is allowed, and as a result, the insertion load can be reduced.

  (6) Since the convex portion 52c is formed on the outer peripheral surface of the sealing portion 52, the convex portion 52c increases the adhesion pressure between the sealing portion 52 and the inner peripheral surface of the cylindrical portion 51, thereby improving the sealing performance. It is like that.

  (7) The convex portion 52c of the sealing portion 52 is provided at a position overlapping the deformation allowing hole 52b in the longitudinal direction. Since the convex portion 52c is the place where the insertion load is most received on the outer peripheral surface of the sealing portion 52, the deformation allowing hole 52b is provided so as to overlap the convex portion 52c, thereby further reducing the insertion load of the sealing portion 52. It can be effectively reduced.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, the longitudinal end surface of the cylindrical portion 51 that is sealed by the sealing portion 52 is formed so as to be parallel to a plane orthogonal to the longitudinal direction, but is particularly limited thereto. It is not a thing. For example, as shown in FIG. 5, the end surface in the longitudinal direction of the cylindrical portion 51 on the side where the sealing portion 52 is mounted may be an inclined surface 51 c that inclines toward the center in the longitudinal direction as it is separated from the connecting portion 53 in the radial direction. . According to such a configuration, when the sealing portion 52 is fitted into the opening 51b of the longitudinal end portion 51a of the cylindrical portion 51, the sealing portion 52 is connected to the longitudinal end portion 51a (particularly, the connecting portion) of the cylindrical portion 51. 53 is less likely to interfere with the portion 53 on the opposite side of the circumferential direction 180 °, and thus the sealing portion 52 can be easily fitted into the opening 51b of the cylindrical portion 51.

  In the above embodiment, the outer diameter D2 of the sealing portion 52 is set equal to the inner diameter D1 of the opening 51b of the cylindrical portion 51, and the outer diameter of the convex portion 52c of the sealing portion 52 is set to the inner diameter D1 of the opening 51b. You may set larger than. According to this configuration, it is possible to ensure the sealing performance by the close contact between the convex portion 52 c and the inner peripheral surface of the cylindrical portion 51 while reducing the insertion load of the sealing portion 52 into the cylindrical portion 51.

  In the above embodiment, the pressure sensor 11 has the configuration including the two electrode wires 23 and 24. However, the number of electrode wires provided in the pressure sensor 11 is one, or three or more. It may be.

  In the above embodiment, the energization detection unit 42 supplies a current to the electrode wire 23 at a constant voltage, and outputs a pressure-sensitive signal when detecting a change in current value caused by the contact between the electrode wires 23 and 24. However, the energization detection unit 42 may be configured to output a pressure-sensitive signal when detecting a change in voltage value caused by contact between the electrode wires 23 and 24.

  In the above embodiment, the present invention is applied to the pressure-sensitive sensor 11 that detects the pressure received from the foreign object X. However, for example, the present invention may be applied to a proximity sensor that detects the proximity of the foreign object X to the sensor line 21. Good. Moreover, you may apply to the sensor which can detect both a contact and proximity | contact.

  In the above embodiment, the sensor line 21 is disposed along the front end portion 5 a of the door panel 5, but at a portion facing the front end portion 5 a of the door panel 5 in the front and rear direction of the vehicle 2 at the peripheral edge of the entrance / exit 4. May be arranged along.

  In the above embodiment, the pressure-sensitive sensor 11 is provided in the electric slide door device 1 that electrically slides and moves the door panel 5 of the vehicle 2, and is between the peripheral edge of the entrance / exit 4 and the front end 5 a of the door panel 5. It is used to detect the existing foreign matter X. However, the pressure-sensitive sensor 11 is provided in an opening / closing device that opens and closes the opening with an electrically operated opening / closing body, in addition to the electric slide door device 1, and exists between the peripheral edge of the opening and the opening / closing body. It may be used to detect the foreign object X. Further, the pressure sensor 11 may be provided in a device other than the opening / closing device and used to detect a pressing force applied to the sensor line 21.

Next, a technical idea that can be grasped from the above embodiment and another example will be added below.
(A) In the foreign object detection device according to any one of claims 1 to 5,
The foreign matter detection device, wherein the sealing portion is formed with a deformation permissible hole extending in a longitudinal direction from an end portion on the insertion side.

Thereby, the elastic deformation | transformation to the radial inside of the sealing part at the time of inserting a sealing part in a cylinder part by a deformation | transformation permission hole is accept | permitted, As a result, the insertion load of a sealing part can be reduced.
(B) In the foreign matter detection device according to any one of claims 1 to 5 and appendix (a),
A foreign object detection device, wherein a convex portion that is in close contact with an inner peripheral surface of the cylindrical portion is provided on an outer peripheral surface of the sealing portion.

  Thereby, since the adhesion pressure between the sealing portion and the inner peripheral surface of the cylindrical portion is increased by the convex portion, the sealing performance can be improved.

  DESCRIPTION OF SYMBOLS 11 ... Pressure-sensitive sensor (foreign substance detection apparatus), 21 ... Sensor wire (sensor main body), 40 ... Protector member (sensor main body protection member), 51 ... Tube part, 51a ... Longitudinal end part, 51b ... Opening, 51c ... Inclination Surface, 52... Sealing portion, 53... Connection portion, 54. Notch portion, X. Foreign matter, D1... Inner diameter dimension of opening, D2.

Claims (5)

A sensor body that is formed in a long shape and detects at least one of pressure from the foreign matter and proximity of the foreign matter;
A cylindrical part that is elastically deformable and accommodates the sensor body, a sealing part that seals an opening at a longitudinal end of the cylindrical part, the sealing part, and the cylindrical part And a sensor main body protection member formed integrally with a connecting portion that connects the two. The foreign object detection device according to claim 1,
The sealing part is fitted into the opening of the cylindrical part,
The outer diameter dimension of the sealing part is formed larger than the inner diameter dimension of the opening, and the opening is sealed by the outer peripheral surface of the sealing part being in close contact with the inner peripheral surface of the cylindrical part. Foreign matter detection device characterized by the above. The foreign matter detection device according to claim 1 or 2,
The foreign matter detecting device, wherein the sealing portion is fitted into the opening of the cylindrical portion and is fitted to the center side of the longitudinal end portion of the cylindrical portion. In the foreign material detection apparatus of any one of Claims 1-3,
The sealing part is fitted into the opening of the cylindrical part,
The connecting part is disposed in a notch part formed by notching a part of a longitudinal end part of the cylindrical part. In the foreign material detection apparatus according to any one of claims 1 to 4,
The sealing part is fitted into the opening of the cylindrical part,
The foreign matter detection device, wherein a longitudinal end surface of the cylindrical portion on a side where the sealing portion is mounted is an inclined surface that is inclined toward a central portion in the longitudinal direction as being spaced apart from the connecting portion in the radial direction. .

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