JPH0911846A - Acceleration sensor device - Google Patents

Abstract

PURPOSE: To provide an inexpensive acceleration sensor device whose handling as a part single body is made comparatively easy by preventing the device from being carelessly and forcedly actuated when it is not installed on a vehicle. CONSTITUTION: A device is transferred to an actuation impossible condition, an actuation possible condition and a forcedly actuating condition by operating so as to move an operation lever 45 of an acceleration sensor device 10, and it is not carelessly and forcedly actuated by giving a moderate feeling to operation force when transferring to the forcedly actuating condition by a moderation giving means installed on the operation lever 45.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical ignition type acceleration sensor device with a forced operating mechanism for use in an occupant protection device such as an air bag device or a pretensioner device.

[0002]

2. Description of the Related Art An air bag device is generally known as a vehicle occupant protection device. In such an airbag device, in order to protect an occupant at the time of sudden deceleration of the vehicle, the acceleration sensor device detects the sudden deceleration of the vehicle and the bag body is inflated.

That is, at the time of sudden deceleration of the vehicle, the acceleration sensor device of the inflator incorporated in the airbag device detects this sudden deceleration, and the acceleration sensor device ignites the detonator, thereby supplying gas from the inflator into the bag body. The bag is inflatable.

On the other hand, when a vehicle equipped with such an air bag device is discarded or the steering wheel is replaced, when the air bag device is discarded, the acceleration of the inflator in the air bag device is taken into consideration in consideration of safety. It is necessary to forcibly ignite the sensor device and keep it in the used state.

Therefore, it has been proposed to provide the acceleration sensor device with a switching mechanism for switching the sensor device to the inoperable state, the operable state, and the forced ignition.

The acceleration sensor device provided with such a switching mechanism must be handled with care so as not to inadvertently ignite before it is assembled to the vehicle body side or when it is removed. In particular, when operating the acceleration sensor so as to shift it from the inoperable state to the operable state, it is necessary to pay close attention not to force the ignition operation.

Therefore, it is conceivable to attach an external protective cover or the like to the acceleration sensor device so as to prevent the acceleration sensor device not assembled to the vehicle body from accidentally igniting. In the case of mounting, the number of parts increases and the cost increases. At the same time, when the acceleration sensor device is assembled to the vehicle body side, the protective cover and the like are removed, so it is essential to pay close attention when operating the switching mechanism from the inoperable state to the operable state. .

[0008]

SUMMARY OF THE INVENTION In view of the above facts, the present invention prevents an acceleration sensor device that is not assembled to the vehicle body from being inadvertently forcibly ignited, and makes handling as a single component relatively simple. It is an object to provide an inexpensive acceleration sensor device.

[0009]

An acceleration sensor device according to claim 1 is in an inoperable state by being moved,
It has an operation lever for performing a switching operation to an operable state or a forced operation state, and a moderation imparting means attached to the operation lever and imparting a moderation feeling when the operable state is shifted to the forced operation state. And

[0010]

In the acceleration sensor device according to the first aspect of the present invention, the operating force for switching from the inoperable state to the forcible operating state is more than the operating force for operating the operating lever to switch from the inoperable state to the operable state. Is increased by the moderation imparting means. Therefore, when shifting to the forced operating state, the operating force of the operating lever has to be increased further, so that the operation from the inoperable state to the operable state is prevented from continuing as it is, and the operating force is inadvertently changed to the forced operating state. Prevent migration. Further, the stepwise increase of the operating force at the time of the operation of shifting to the forcibly operated state allows the worker to recognize that the forcible operation is going to be performed and prevent inadvertent operation.

[0011]

【Example】

(Description of Configuration of First Embodiment) FIGS. 1 to 8 show an acceleration sensor device according to a first embodiment to which the present invention is applied.

In the acceleration sensor 10 of the first embodiment, three-step control operation is performed by changing the height of the operation plate 11 fixed to the free end of the shaft portion of the operation lever and pulling it out. That is, the operation plate 11 shown in FIG.
In the first state in which the operation plate 11 is in contact with the end surface 10A of 0, the operation plate 11 shown in FIG.
When the operation plate 11 shown in FIG. 3 is pulled out from the acceleration sensor end face 10A to the upper limit position, it is configured to be forcedly ignited when it is pulled out from 0A to the intermediate predetermined height position. There is.

The mechanical ignition type acceleration sensor 10 is provided with a case 12 which constitutes a sensor main body portion as shown in the drawing. The case 12 is formed in a cylindrical shape having a bottom wall 14 at one end, and a plate 16 which similarly constitutes a sensor main body portion is fixed and sealed by a cover 18 on the opening side. A through hole 20 is formed on the bottom wall 14 of the case 12 on the axis, and a cylindrical guide hole 22 is formed in the case 12.

An ignition pin 24 is arranged inside the case 12. The ignition pin 24 is composed of a main body 26 formed in a substantially cylindrical shape and a convex portion 28 formed integrally with the bottom wall 26A of the main body 26 so as to slide in the case 12 along the axis. By moving, the convex portion 28 can enter the through hole 20 formed in the bottom wall 14. The convex portion 28 protrudes from the through hole 20 to the outside when the ignition pin 24 (main body 26) is moved to the side of the bottom wall 14 of the case 12 most.

A firing spring 30 is arranged between the plate 16 fixed to the opening side of the case 12 and the ignition pin 24, and the ignition pin 24 is always provided in the through hole 20.
Is biased in the direction of.

An inertial mass body 32 is arranged in the guide hole 22 of the case 12. The inertial mass body 32 is formed in a substantially cylindrical shape, and is housed in the guide hole 22 so as to be movable along the axial direction. A bias spring 34 is arranged between the inertial mass body 32 and the plate 16 and always biases the inertial mass body 32 toward the bottom wall 14.

A trigger lever 36 is arranged between the inertial mass body 32 and the ignition pin 24. One end of the trigger lever 36 in the longitudinal direction is rotatably supported by a shaft 38. Further, the tip end of the trigger lever 36 is bent toward the ignition pin 24 to form an engagement portion 40,
The ignition pin 24 can be engaged. That is, when the trigger lever 36 rotates about the shaft 38, the engaging portion 40
Can approach or separate the ignition pin 24. In a state where the engaging portion 40 of the trigger lever 36 is engaged with the main body 26 of the ignition pin 24, the ignition pin 24 urged by the firing spring 30 is located at a position where the convex portion 28 is pulled out from the through hole 20. keeping.

Further, a slide holding portion 42 is formed so as to project toward the inertial mass body 32 on the side opposite to the ignition pin 24 near the tip of the trigger lever 36. The slide holding portion 42 corresponds to the release hole 44 formed in the inertial mass body 32, and is configured to be able to enter the release hole 44 when the inertial mass body 32 moves. That is,
Normally, the inertial mass 32 is in a position closest to the bottom wall 14 of the case 12 by the bias spring 34,
In this state, the inertial mass body 32 is in contact with the slide holding portion 42 of the trigger lever 36, the engaging portion 40 of the trigger lever 36 engages with the body 26 of the ignition pin 24, and the ignition pin 24 is projected. The portion 28 is held at a position where it is pulled out from the through hole 20. Further, when the inertial mass body 32 moves in the direction away from the bottom wall 14, the inertial mass body 32 relatively moves in linear contact with the slide holding portion 42 of the trigger lever 36, and the slide holding portion 42 moves. It is configured to enter the release hole 44.

On the other hand, an operating lever 45 is arranged in the central portion of the plate 16 (between the ignition pin 24 and the cover 18). The operation lever 45 includes a disc-shaped main body 46,
And a shaft portion 47 integrally fixed to the main body portion 46, and supported by the plate 16 and the cover 18 so as to be movable along the axis. An arm portion 48 is formed on the operation lever 45. Arm 48 is plate 1
6 and extends toward the inertial mass body 32, and a locking portion 50 is formed at the tip. The locking portion 50 is fitted in an engaging groove 52 formed along the axial direction at the end of the inertial mass body 32. As a result, when the locking portion 50 approaches the one end portion 52A of the engaging groove 52 (the state shown in FIG. 1), the inertial mass body 32 moves the operating lever 45.
In the state (the state shown in FIG. 2) of being held by the (arm portion 48) so that the movement thereof in the axial direction is blocked and the locking portion 50 is separated from the one end portion 52A of the engaging groove 52 (the state shown in FIG. 2), the inertial mass body 32 is in the axial direction. It is a structure that enables movement.

Further, as shown in FIG. 2, when the locking portion 50 of the operating lever 45 is separated from the one end portion 52A of the engagement groove 52 (close to the other end portion 52B of the engagement groove 52), further operation is performed. When the lever 45 moves in the axial direction, the locking portion 50 engages with the other end portion 52B of the engagement groove 52, and the inertial mass body 32 is forcibly moved together with the operation lever 45 to the state of FIG. It is a composition.

A compression coil spring 54 is arranged between the operating lever 45 and the cover 18, and the locking portion 50 is provided.
Always biases the operation lever 45 in a direction approaching the one end portion 52A of the engagement groove 52.

A height equal to the distance between the inner surface of the cover 18 and the upper surface of the main body portion 46 in the operable state shown in FIG. 2 is provided between the cover 18 and the main body portion 46 on the outer peripheral portion of the shaft portion 47 of the operating lever 45. The restraining motion member 56 as a moderation imparting means having the above is arranged. The restraint operation member 56 is formed of a soft metal, resin, or the like into a tubular shape that is loosely fitted to the shaft portion 47.

For example, as shown in FIG.
As 6, a cylinder having a plurality of through holes 58 that are long in the axial direction can be used in the middle portion of the peripheral surface. In this case, when the restraining motion member 56 is compressed in the axial direction, the restraining motion member 56 buckles in a state where the intermediate portion is bent outward as illustrated in FIG.

Further, as shown in FIG. 6, the restraining operation member 56 may be one in which a notch 60 which is open to one end opening is formed on the peripheral surface of a cylinder. In this case, when the restraining motion member 56 is compressed in the axial direction,
As illustrated in FIG. 3, the notch 60 buckles so as to bend near the open end.

Further, as shown in FIG. 8, the restraining operation member 56 may be formed of rubber or a plastic resin in a thick cylindrical shape. In this case, the restraining motion member 56 is elastically deformed so that the axial height thereof is contracted when it is contracted in the axial direction.

As shown in FIG. 1, the shaft portion 47 of the operation lever 45 is projected to the outside from the through hole 19 formed in the cover 18, and the operation plate 11 is attached thereto. The operation plate 11 is operated from the outside by a sensor operation mechanism (not shown). The sensor operation mechanism is arranged corresponding to the operation plate 11. The sensor operating member 110 of this sensor operating mechanism can be fitted between the operating plate 11 and the cover 18 by pushing in the sensor operating member 110 in the direction of arrow A in FIGS. 1 to 3. That is, the sensor operating member 110 is fitted between the operating plate 11 and the cover 18 to separate the operating plate 11 from the cover 18, and the locking portion is urged by the urging force of the compression coil spring 54 in a normal operation. The operation lever 45, in which 50 is close to the one end portion 52A of the engaging groove 52, is moved in the axial direction by a predetermined amount so that the locking portion 50 causes the one end portion 52A of the engaging groove 52.
It is a configuration that can be separated from.

The mechanical ignition type acceleration sensor 10 having the above-mentioned structure is assembled to the plate 56 of the inflator in the airbag apparatus. A detonator 60 for igniting and burning the gas generating agent in the inflator is arranged on the plate 56. The detonator 60 is a mechanical ignition type acceleration sensor 10
Is located on the axis of the mechanical ignition type acceleration sensor 10 in the assembled state. Therefore, in this assembled state, the through hole 20 of the case 12 faces the detonator 60, and the projection 2 of the ignition pin 24 that can project from this through hole 20.
8 can collide with the detonator 60.

(Explanation of Operation of First Embodiment) In the mechanical ignition type acceleration sensor 10 having the above-mentioned structure, normally,
As shown in FIG. 1, the ignition pin 24 is located at a position separated from the detonator 60 (position extracted from the through hole 20 of the case 12) against the biasing force of the firing spring 30, and the trigger lever 36 is engaged with the engaging portion. 40 is the body 26 of the ignition pin 24
To hold the ignition pin 24. Further, the inertial mass body 32 enters the position closest to the bottom wall 14 by the bias spring 34, that is, the rotation locus of the trigger lever 36, and the inner peripheral wall abuts on the slide holding portion 42 of the trigger lever 36, so that the trigger lever 36 moves. Is prevented from rotating and the ignition pin holding state is maintained.

Further, in the inoperable state of the acceleration sensor shown in FIG. 1, the locking portion 50 of the operating lever 45 approaches the one end portion 52A of the engaging groove 52 of the inertial mass body 32, and this state is the compression coil spring. It is maintained by the biasing force of 54. Therefore, in this state, even if a large acceleration acts on the mechanical ignition type acceleration sensor 10, the inertial mass body 32 has the one end portion 52A of the engaging groove 52 engaged with the locking portion 50 of the operation lever 45. It does not move (the slide holding portion 42 of the trigger lever 36 does not enter the release hole 44), and therefore the trigger lever 36 does not rotate and the ignition pin holding state is not released. .

Next, in order to activate the acceleration sensor, the sensor operating member 110 is pushed. As a result, the tip of the insertion inclined portion 112 is fitted between the operation plate 11 and the cover 18, and the release plate portion 114 engages with the operation plate 11. Then, the operation lever 45 is moved in the axial direction against the biasing force of the compression coil spring 54, and the locking portion 50 is separated from the one end portion 52A of the engagement groove 52 as shown in FIG. The mass body 32 can be moved in the axial direction, and the acceleration sensor can be operated.

When the operation lever 45 moves to the position shown in FIG.
The restraining motion member 56 is squeezed between the main body portion 46 and the cover 18 to restrain the operating lever 45 from continuously moving further. Therefore, if the worker feels the resistance force of the restraining motion member 56 when the operation lever 45 is continuously moved from the operable state of FIG. It can prevent forced ignition.

When a large acceleration acts on the mechanical ignition type acceleration sensor 10 while the acceleration sensor is in an operable state, the inertial mass body 32 inertially moves in the direction of the plate 16 and the release hole is formed in the rotation locus of the trigger lever 36. 44 corresponds. When the slide holding portion 42 of the trigger lever 36 faces the release hole 44 of the inertial mass body 32 and the holding is released, the direction in which the slide holding portion 42 is separated from the ignition pin 24 by the ignition pin 24 urged by the firing spring 30. The trigger lever 36 pressed against is rotated in a direction away from the ignition pin 24. As a result, the trigger lever 3
6, the engaging portion 40 of the ignition pin 24 is separated from the main body 26 of the ignition pin 24 to release the holding of the ignition pin 24.
Moves in the axial direction by the urging force of the firing spring 30, and the convex portion 28 projects outward from the through hole 20.

As a result, the convex portion 28 of the ignition pin 24 collides with the detonator 60 and the detonator 60 is ignited. When the detonator 60 is ignited, the gas generating agent of the inflator 104 is ignited and burned, and the airbag device is operated.

Next, when the mechanical ignition type acceleration sensor 10 is forcibly actuated when the vehicle is disposed of, etc., the sensor operating member 110 is moved in the direction of arrow A, and the pull-up inclined portion 116 is removed from the cover 18. The operation plate 11 is further separated, and the forced operation plate portion 118 is sandwiched between them.
The state shown in FIG. 3 is obtained.

At this time, the operation force of the sensor operation member 110 for moving the operation lever 45 is equal to the operation force of the restraining operation member 5.
Since 6 is subjected to buckling deformation as shown in FIG. 3, a relatively large operating force is required, and there is a feeling of moderation. Therefore, the worker can surely recognize that he / she is performing the forced ignition operation, so that it is possible to prevent accidental forced ignition.

The buckling deformation of the restraining motion member 56 is such that the one shown in FIG. 4 and the one shown in FIG. 6 buckle as shown in FIG. 5 and FIG. 7, or as shown in FIG. The one shown in will be deformed so as to reduce the height.

In this way, the mechanical ignition type acceleration sensor 1
When 0 is forcibly ignited, as shown in FIG.
0 engages with the other end portion 52B of the engagement groove 52 and the inertial mass body 3
2 is forcibly moved in the axial direction, and the slide holding portion 42 of the trigger lever 36 faces the release hole 44 of the inertial mass body 32 to release the holding. After that, as in the case of the large acceleration action described above, the ignition pin 24 moves by the urging force of the firing spring 30, the convex portion 28 collides with the detonator 60, the detonator 60 is ignited, and the gas generating agent of the inflator is generated. Ignition and combustion.

As described above, the mechanical ignition type acceleration sensor 10
In order to ignite the detonator 60 by forcibly moving the inertial mass body 32 in the axial direction by operating the operation lever 45 without applying a predetermined inertial force to the sensor, the machine may be disposed when the vehicle is discarded. It is no longer necessary to deactivate the airbag device using the ignition type acceleration sensor 10 from the steering wheel and dispose of the airbag device.
Workability is improved.

Further, when the mechanical ignition type acceleration sensor 10 is switched by moving the operating lever 45, the operation of switching from the operable state to the forced ignition state involves a much larger difference in operating force. Therefore, it is possible to prevent the forced ignition operation from being inadvertently performed due to work rush or the like.

Further, since the restraining motion member 56 is a small part and can be manufactured at low cost, a low-priced product can be provided. Moreover,
The depressing operation member 56 is incorporated in the mechanical ignition type acceleration sensor 10 and is not removed like a cover protection member, so that it is possible to prevent an inadvertent forced ignition operation from being always performed. (Description of Configuration of Second Embodiment) Next, a second embodiment of the present invention will be described. The same components as those in the first embodiment are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

9 to 11 show a second embodiment to which the present invention is applied.
The overall configuration of the mechanical ignition sensor 10 according to the embodiment is shown in a sectional view.

Mechanical ignition type acceleration sensor 1 of the second embodiment
In No. 0, instead of the compression coil spring 54 and the restraining motion member 56 of the mechanical ignition sensor 10 according to the first embodiment, a restraining motion member 56A constituted by a disc spring as a moderation imparting means is used.

As shown in FIG. 9, the restraining action member 56A is formed to have an appropriate elastic force by providing a plurality of notched portions 62 which are hemispherical shell-shaped and open at the outer peripheral end thereof. The restraining motion member 56A has the shaft portion 47 inserted into the central through hole portion thereof and is placed on the shaft step portion 47A.
Further, the outer peripheral end portion thereof is disposed in contact with the inner peripheral flat surface portion 16A of the opening of the plate 16 on the operation plate 11 side.

Further, the restraining operation member 56A is arranged so as to elastically deform in a plane in the operable state shown in FIG. (Explanation of Operation of Second Embodiment) The mechanical ignition type acceleration sensor 10 of the second embodiment is in the inoperable state shown in FIG.
The restraining motion member 56A is in a state in which its outer peripheral end portion is raised toward the operation plate 11 side, and biases the operation lever 45 in the direction of arrow B in the drawing.

Next, the sensor operating member 110 is inserted between the operation plate 11 and the cover 18 to move the operation plate 11,
When shifting to the operable state shown in 0, the restraining motion member 56A elastically deforms in a substantially planar shape. During this operation,
Although the restraining motion member 56A starts elastically deforming with a relatively weak force, the force for elastically deforming the restraining motion member 56A rapidly increases as the restraining motion member 56A elastically deforms in a planar shape. Therefore, the force for inserting the sensor operating member 110 also increases.

Next, when the sensor operating member 110 is further inserted and the operating lever 45 is further moved to shift from the operable state of FIG. 10 to the forced ignition state shown in FIG. 11, the restraining operation member 56A. Shows an extremely large repulsive force immediately before exceeding the flat state, and therefore the operating force for pushing in the sensor operating member 110 so that the pull-up inclined portion 116 starts to pull out the operating plate 11 becomes large.
Then, the repulsive force of the restraint motion member 56A remains constant for a while near the position where the restraint motion member 56A exceeds the planar state, and the repulsive force against the elastic deformation thereafter becomes weak.

Therefore, as compared with the operating force when the mechanical ignition type acceleration sensor 10 starts to shift from the inoperable state to the operable state, the operator can determine the operating force at the time of shifting from the operable state to the forced ignition state. It is possible to give a sense of moderation by making different ones so large that they can be sufficiently distinguished and recognized. Therefore, it is possible to prevent the mechanical ignition type acceleration sensor 10 from being accidentally forcibly ignited.

The configuration, operation, and effect of the second embodiment other than those described above are the same as those of the first embodiment described above, and therefore the description thereof is omitted. (Description of Configuration of Third Embodiment) Next, a third embodiment of the present invention will be described. The same components as those in the first embodiment are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

12 to 14 are sectional views showing the overall construction of the mechanical ignition sensor 10 according to the third embodiment of the present invention.

Mechanical ignition type acceleration sensor 1 of the third embodiment
In 0, instead of the compression coil spring 54 and the restraining motion member 56 of the mechanical ignition sensor 10 according to the first embodiment, a restraining motion member 56B constituted by a truncated cone compression coil spring as a moderation imparting means is used. There is. As shown in FIG. 12, the restraint operation member 56B has the shaft portion 47 inserted into the central round hole portion, the round hole portion is placed on the shaft step portion 47A, and the outer peripheral end portion of the plate 16 is provided. It is fitted and arranged in the recess 16B near the opening on the operation plate 11 side.

Further, the restraining operation member 56B is arranged so as to be elastically deformed into a plane in the operable state shown in FIG. (Explanation of Operation of Third Embodiment) In the mechanical ignition type acceleration sensor 10 of the third embodiment, in the inoperable state shown in FIG. 12, the restraining operation member 56B makes its outer peripheral end portion rise to the operation plate 11 side. In this state, the operation lever 45 is biased in the direction of arrow B in the figure.

Next, the sensor operating member 110 is inserted between the operation plate 11 and the cover 18 to move the operation plate 11,
When shifting to the operable state shown in FIG. 3, the restraining motion member 56B elastically deforms in a substantially planar shape. During this operation,
The restraining motion member 56B starts elastically deforming with a relatively weak force, and the wire rods of the springs of the restraining motion member 56B come into contact with each other as they approach the operable state shown in FIG. Since a large resistance force is exhibited, the force for inserting the sensor operating member 110 also increases.

Next, when the sensor operating member 110 is further inserted and the operating lever 45 is further moved to shift from the operable state of FIG. 13 to the forced ignition state shown in FIG. 14, the restraining operation member 56B. Exceeds the planar state, and is elastically deformed so that its outer peripheral end faces the main body 46 side. During this operation, the restraining motion member 56B elastically deforms from the initial frustoconical shape to a large twist in the opposite direction.

Therefore, as compared with the operating force when the mechanical ignition type acceleration sensor 10 starts to shift from the inoperable state to the operable state, the operator operates the operating force when the operable ignition state shifts to the forced ignition state. It is possible to give a sense of moderation by making them so large that they can be sufficiently distinguished and recognized. Therefore, it is possible to prevent the mechanical ignition type acceleration sensor 10 from being accidentally forcibly ignited.

The structure, operation, and effect of the third embodiment other than those described above are the same as those of the first embodiment described above, and therefore the description thereof is omitted. (Description of Configuration of Fourth Embodiment) Next, a fourth embodiment of the present invention will be described. The same components as those in the first embodiment are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

15 to 17 are sectional views showing the overall construction of the mechanical ignition sensor 10 according to the fourth embodiment of the present invention.

Mechanical ignition type acceleration sensor 1 of the fourth embodiment
In 0, instead of the compression coil spring 54 and the restraining motion member 56 of the mechanical ignition sensor 10 according to the first embodiment, a restraining motion member 56C constituted by a fine frustoconical compression coil spring as a moderation imparting means is used. Has been. As shown in FIG. 15, the restraining motion member 56C has a shaft portion 47 inserted into a central through hole portion, the through hole portion is placed on the main body portion 46, and the outer peripheral end portion is covered with the cover 1.
The circular projecting portion 18A of No. 8 is placed in contact with the inner peripheral corner portion.

In the operable state shown in FIG. 16, all of the wire rods adjacent to each other of the coil spring come into contact with the restraining motion member 56C, so that the restraining motion member 56C cannot be elastically deformed any more, and the restraining member 56C is moved further. It is configured to exert resistance against continuous movement. (Explanation of Operation of Fourth Embodiment) In the mechanical ignition type acceleration sensor 10 of the fourth embodiment, in the inoperable state shown in FIG. 15, the restraining operation member 56C moves the operating lever 45 to the arrow B in the figure.
Biased in the direction.

Next, the sensor operating member 110 is inserted between the operation plate 11 and the cover 18 to move the operation plate 11,
When shifting to the operable state shown in FIG. 6, the restraining motion member 56C reaches a limit state in which the adjacent wire members come into contact with each other, and the elastic member is not further elastically deformed. During this operation, the restraining motion member 56C elastically deforms with a substantially constant force.

Next, when the sensor operating member 110 is further inserted and the operating lever 45 is further moved to shift from the operable state of FIG. 16 to the forced ignition state shown in FIG. 17, the restraining operation member 56C. Becomes a so-called buckled deformation state in which the truncated cone shape collapses from the elastic deformation limit state as shown in the figure.

During this operation, the restraining motion member 56C exhibits a relatively large resistance force and a moderation sensation because the frictional force between the wire rods works together with the complicated bending and twisting forces.

Therefore, as compared with the operating force for shifting the mechanical ignition type acceleration sensor 10 from the inoperable state to the operable state, the operator has sufficient operating force for the transition from the operable state to the forced ignition state. The distinction can be made so that they can be distinguished and recognized.

Therefore, it is possible to prevent the mechanical ignition type acceleration sensor 10 from being accidentally forcibly ignited.

The structure, operation, and effect of the fourth embodiment other than those described above are the same as those of the first embodiment described above, and hence the description thereof is omitted.

[0065]

As described above, the acceleration sensor device according to the present invention gives a feeling of moderation when shifting to the operation for forcibly operating and calls attention, and is not accidentally forcibly operated when it is not attached to the vehicle. Thus, there is an excellent effect that it is possible to provide an inexpensive acceleration sensor device with improved safety and relatively easy handling as a single component of the acceleration sensor device.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an inoperable state of an acceleration sensor device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing an operable state of the acceleration sensor device according to the first embodiment to which the present invention is applied.

FIG. 3 is a sectional view showing a forced operating state of the acceleration sensor device according to the first embodiment to which the present invention is applied.

FIG. 4 is a perspective view showing a configuration example of a restraining operation member according to the first embodiment to which the present invention is applied.

FIG. 5 is a perspective view showing an example of the configuration of the restraining motion member according to the first embodiment of the present invention after compression deformation.

FIG. 6 is a perspective view showing another configuration example of the restraint operation member according to the first embodiment to which the present invention is applied.

FIG. 7 is a perspective view showing another configuration example after the compression deformation of the restraint operation member according to the first embodiment to which the present invention is applied.

FIG. 8 is a perspective view showing still another configuration example of the restraint operation member according to the first embodiment to which the present invention is applied.

FIG. 9 is a cross-sectional view of essential parts showing an inoperable state of the acceleration sensor device according to the second embodiment to which the invention is applied.

FIG. 10 is a main-portion cross-sectional view showing an inoperable state of the acceleration sensor device according to the second embodiment to which the invention is applied.

FIG. 11 is a cross-sectional view of essential parts showing an inoperable state of the acceleration sensor device according to the second embodiment of the invention.

FIG. 12 is a cross-sectional view of essential parts showing an inoperable state of an acceleration sensor device according to a third embodiment of the invention.

FIG. 13 is a cross-sectional view of essential parts showing an inoperable state of the acceleration sensor device according to the third embodiment of the invention.

FIG. 14 is a cross-sectional view of essential parts showing an inoperable state of the acceleration sensor device according to the third embodiment of the invention.

FIG. 15 is a cross-sectional view of essential parts showing an inoperable state of the acceleration sensor device according to the fourth embodiment of the present invention.

FIG. 16 is a cross-sectional view of essential parts showing an inoperable state of the acceleration sensor device according to the fourth embodiment of the invention.

FIG. 17 is a sectional view of relevant parts showing a forced operating state of the acceleration sensor device according to the fourth embodiment of the invention.

[Explanation of symbols]

10 acceleration sensor 11 operation plate 16 plate 18 cover 24 ignition pin 32 inertial mass body 45 operation lever 46 body part 47 shaft part 48 arm part 50 locking part 52 engagement groove 56, 56A, 56B, 56C restraining motion member (moderation imparting) means)

Claims (1)

[Claims] 1. An operating lever for performing a switching operation to an inoperable state, an operable state, or a forced operating state by being moved, and an operation lever mounted on the operating lever to shift from the operable state to the forced operating state. And a moderation imparting unit that imparts a moderation sensation when the acceleration sensor device is operated.