JP3015831U - Push latch device with accelerometer - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a lightweight and small push latch device with an acceleration sensor. [Structure] A plate member 3 that can move in parallel as an acceleration detecting unit 6.
When 0 is used and acceleration B is applied to the latch body 2,
The slider positioning means 5 is constituted by the plate member 30 that moves in parallel.
By restricting the movement of the cam 11, the movement of the latch slider 4 is restricted, thereby preventing the latch release of the tip of the push rod 20.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a push latch device that performs connection and disconnection between objects by a push motion of one object, and particularly relates to a push latch device with an acceleration sensor that temporarily stops the connection release when acceleration is applied.

[0002]

[Prior art]

 Conventionally, a push-latch device is well known as a device for connecting objects to each other and simply releasing the connection.

This push latch device is composed of a push rod fixed to one object and having a convex portion at its tip, and a latch main body fixed to the other object and latching the convex portion and releasing the latch. ing.

According to such a push-latch device, when the tip of the push rod fixed to one object is pushed into the latch main body fixed to the other object, the latch slider arranged in the latch main body is pushed. Moves backward from the initial position while elastically latching the tip of the push rod. Then, when the latch slider retreats for a certain distance and reaches the latch position where the tip of the push rod is securely latched, the retreat is temporarily stopped by the cam mechanism provided in the latch body.

When the movement of the latch slider is temporarily stopped by the cam mechanism in this way, the latch slider remains in a state in which the tip of the push rod is latched, so that the pair of objects is connected (latched). The Rukoto.

On the other hand, in order to release the connection between the above-mentioned objects, the push rod is pushed again into the latch main body from the connected state between the objects, and the push mechanism is pushed again, so that the cam mechanism is temporarily stopped. Is released, and the latch slider returns to the initial position by the urging force of the return spring, so that the latch at the tip of the push rod by the latch slider is released, and the connection between the objects is released.

[0007]

[Problems to be solved by the device]

 By the way, the push-latch device described above has a structure in which the objects are connected by pushing the push rod once into the latch body, and the push-rod is pushed again from the connected state to release the connection between the objects. This structure is designed to connect and disconnect objects by the push motion of the push rod with respect to the latch body. Conversely, the push motion of the latch body with respect to the push rod also connects and disconnects the objects. There are difficulties.

Considering, for example, a box formed on a dashboard of an automobile and a lid that opens and closes the box opening, a push rod is arranged on the lid and a latch body is arranged on the box side. In normal use, the lid will open and close due to the push motion of the lid against the box.However, if the car in motion is suddenly braked, acceleration will be applied to the box, so The latch body performs a push motion with respect to the push rod of the lid, which causes a problem that the lid opens even though the lid is closed.

In addition, as an example of such a relation, in relation to the closet and the door that opens and closes the closet, a sudden acceleration is applied to the closet due to the earthquake, and the door is closed regardless of whether the close is closed. There are also cases where it opens.

On the other hand, in order to prevent the disconnection between the objects due to the acceleration applied to the latch body as described above, when acceleration is applied to the latch body side, the sliding of the latch slider is temporarily stopped and the latch slider is moved. A push-latch device with a so-called acceleration sensor that does not release the connection state between objects due to is also proposed.

In this conventional push latch device with an acceleration sensor, a steel ball movably arranged in the latch body is used as a slide stopping means of the latch slider, and when acceleration acts on the latch body, The latch slider and the steel ball collide with each other to stop the movement of the latch slider, thereby preventing the connection state between the objects from being released.

However, in the above-described conventional push-latch device with an acceleration sensor, a steel ball that moves inside the latch body is used as a means for stopping the movement of the latch slider when acceleration acts on the latch body. However, there was a problem that the latch body became large and heavy.

In view of the above-mentioned circumstances, an object of the present invention is to provide a lightweight and compact push-latch device with an acceleration sensor.

[0014]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, according to the present invention, there is provided a push rod fixed to one object, and a latch body fixed to the other object for latching and releasing the push rod tip. A latch slider for latching and releasing the tip of the push rod is formed, and a latch slider that reciprocates in response to the push movement of the push rod, and a latch slider that moves in response to the push movement of the push rod are attached to the push rod tip. Slider positioning means consisting of a cam mechanism for positioning the latch at the initial position and the latch position, a slider initial position returning member for returning the latch slider that has reached the latch position to the initial position, and acceleration Acceleration means for locking the movement of the latch slider, In a push-latch device with an acceleration sensor having a latch body, a cam mechanism of the slider positioning means is engaged with a cam groove formed on the upper surface of the latch slider, and the latch slider is engaged along the cam groove. Is composed of a cam for locating the latch at the initial position for releasing the latch at the tip of the push rod and a latch position respectively, and an engagement hole for engaging the acceleration detecting means with the cam of the slider positioning means is formed. The plate member and the plate member are supported substantially parallel to the latch slider, and when acceleration is applied to the latch body, the plate member is moved substantially parallel from the initial position along the latch slider. The engagement hole of the plate member and the cam of the slider positioning means are engaged with each other so that the cam groove of the cam is engaged. When the link member that restricts the movement and the acceleration applied to the slider body disappears, the plate member is returned to the initial position through the link member, and the engagement hole of the plate member and the cam of the slider positioning means are separated. It is constituted by a plate material initial position returning means for releasing the engagement.

[0015]

[Action]

 According to the above-described push-latch device with an acceleration sensor, a plate material that can be moved in parallel is used as the acceleration detection means, and when acceleration is applied to the latch body, the plate material that moves in parallel moves the cam of the slider positioning means. By restricting and locking the movement of the latch slider and thereby restricting the latch release at the push rod tip, it is possible to reduce the space occupied by the acceleration detecting means in the latch body. Thus, it is possible to provide a push latch device with an acceleration sensor that is light in weight and small in size as compared with a device using a heavy steel ball as described above.

[0016]

【Example】

 An embodiment of a push latch device with an acceleration sensor according to the present invention will be described in detail below.

FIG. 1 is a conceptual side sectional view of a push latch device 1 with an acceleration sensor according to the present invention, and particularly shows a side cross section of a latch body 2.

In the housing 3 of the latch body 2, a latch slider 4 for latching and releasing the push rod tip, which will be described later, and a latch release position and a latch position for the push rod tip are provided. There are provided slider position determining means 5 for positioning the latch slider 4 and acceleration detecting means 6 for temporarily stopping the movement of the latch slider 4 when acceleration is applied to the latch body 2.

Among them, the latch slider 4 is, as shown in FIG. 2 shown in the AA cross section of FIG. 1, a slider body 4a arranged so as to be slidable between a pair of guides 7 along the right direction of the drawing. The latch member 4b is formed integrally with the tip of the push rod to latch and release the push rod tip.

The opening 4c of the latch member 4b is narrowed by the opening 3a of the housing 3 when the slider body 4a is moved rightward in the drawing, and latches the tip of the push rod. At the initial position of the latch slider 4, the tip of the latch member 4b is expanded and the tip of the push rod is released.

On the other hand, the slider positioning means 5 for positioning the above-mentioned latch slider 4 at the latch release position and the latch position respectively is, as shown in FIG. 2, a heart-shaped cam formed on the upper surface of the slider body 4a. It is composed of grooves (arrows 10a, 10b) and a cam 11 consisting of a cylindrical projection that is guided counterclockwise along the cam grooves 10a, 10b. As shown in FIG. 1, the cam 11 is formed so as to project from the tip of an arm 13 which is rotatable about a shaft 12 at a predetermined rotation angle.

1 and 2, reference numeral 15 is a coil spring that is a slider initial position returning member that returns the latch slider 4 to the initial position shown in FIG. 2. One end of this coil spring 15 is supported inside the slider body 4a. The other end 15a is supported by a flat surface portion 12b formed on the base end 12a of the shaft 12 for supporting the arm 13, as shown in FIG.

When the other end 15a of the coil spring 15 for returning the latch slider 4 to the initial position is supported by the flat portion 12b of the shaft 12 for supporting the arm 13, the arm 13 is urged by the coil spring 15. Always returns to the rotation reference position around the shaft 12 shown in FIG.

According to the slider positioning means 5 described above, as shown in FIG. 3 in which the same parts as those in FIG. 2 are indicated by the same reference numerals, the protrusion 20a formed at the tip of the push rod 20 is connected to the latch member of the slider body 4a. 4b, and when the slider body 4a is pressed (pushed) to the right side of the drawing against the biasing force of the coil spring 15, the cylindrical cam 11 moves along the cam groove 10a. Stop at the final point of 10a and stop at point 4d.

In this way, when the cam 11 of the slider positioning means 5 is locked at the temporary stop point 4d which is the final point of the cam groove 10a, the latch member 4b of the slider body 4a is pushed by the push rod 20 as shown in FIG. Since the convex portion 20a of the vehicle is stopped at the position where it is securely latched, the state in which one object to which the push rod 20 is fixed and the other object to which the latch body 2 is fixed are connected, that is, the latched state. Becomes

Further, from the position of the push rod 20 shown in FIG. 3, when the push rod 20 is pushed again against the biasing force of the coil spring 15 into the latch body 4 (right direction in the drawing), the push rod 20 is pushed again. By the operation, the engagement between the cam 11 and the temporary stop point 4d which is the final point of the cam groove 10a is released, whereby the cam 11 returns to the initial position along the cam groove 10b shown in FIG. The main body 4a also returns to the initial position by the biasing force of the coil spring 15.

As described above, when the latch slider 4 is returned to the initial position shown in FIG. 2, the latch member 4b of the slider body 4a releases the latch at the tip of the push rod 20 and the connection between the objects is also released. It

On the other hand, the acceleration detecting means 6 for temporarily stopping the movement of the latch slider 4 when acceleration is applied to the latch body 2 is arranged in parallel with the latch slider 4 as shown in FIG. A plate member 30 and a link member 31 for moving the plate member 30 from its initial position in parallel to the right direction in the drawing along the latch slider 4 when an acceleration in the direction of arrow B is applied to the latch body 2. There is.

Among them, the link member 31 is a pair of links having a substantially U-shaped cross section, which is rotatably supported by shafts 7 a and 7 b (FIG. 2) planted on the side of the pair of guides 7. 32, 33, and arc-shaped projections 32a, 32b, 33a, 33b for supporting the plate member 30 from the upper and lower surfaces thereof are formed on the upper portion thereof.

As shown in FIG. 4 which is a sectional view taken along the line CC of FIG. 1, a substantially T-shaped guide hole 30 a is formed at a predetermined position on the surface of the plate member 30, and the guide hole 30 a projects from the upper portion of the cam 11. The columnar pin 11a provided is inserted.

The pin 11a moves in the guide hole 30a in accordance with the movement of the cam 11. Particularly, a part of the guide hole 30a formed on the left side of the drawing moves the pin 11a. It functions as the engagement hole 30b to be stopped.

According to the guide hole 30a of the plate member 30 described above, in the state of FIG. 3, that is, in the state where the push rod 20 is latched, the pin 11a follows the movement of the cam 11 and, as shown in FIG. When the push rod 20 is unlatched after being moved to the central portion of the guide hole 30, the pin 11a is driven by the movement of the cam 11 and returns to the initial position shown in FIG.

Next, the operation of the above-described acceleration detecting means 6 will be described, and the configuration will be described in more detail.

As shown in FIG. 5, in the state where the push rod 20 is latched, that is, the latch member 4b of the slider body 4a (FIG. 3) latches the convex portion 20a of the push rod 20, the arrow B in FIG. When the acceleration in the direction of the arrow acts on the latch body 2 as shown in FIG. 6, a force to stop the plate member 30 due to its inertia acts on the plate member 30 as shown in FIG. 6 which is a side sectional view of FIG. Therefore, the links 32, 33 are connected to the shafts 7a against the urging force of the return spring 40 which is a plate material initial position returning means for returning the links 32, 33 to their initial positions. , 7b as a center of force to rotate in the time direction.

In this way, when the links 32 and 33 rotate clockwise about the shafts 7a and 7b, the plate member 30 supported on the upper portions of the links 32 and 33 is parallel to the slider body 4a. While keeping, move to the right in the drawing as indicated by arrow E.

Then, as shown in FIG. 7 shown in the DD cross section of FIG. 6, the pin 11 a is fitted into the engaging hole 30 b of the plate member 30.

When the pin 11a is fitted into the engagement hole 30b and the engagement hole 30b and the pin 11a are engaged with each other, the arm 13 is supported by the engagement of the engagement hole 30a and the pin 11a. Since the rotation of the cam 11 around the shaft 12 is restricted, the slider body 4a is further moved to the right in the drawing by the acceleration (arrow B) applied to the latch body 2, and the cam 11 shown in FIG. Even after the stop point 4d, which is the final point of the cam groove 10a, is released, after the acceleration acting on the latch main body 2 disappears, the cam 11 shown in FIG. The temporary stop point 4d, which is the point, is locked to regulate the movement of the slider body 4a.

Therefore, even if the acceleration (arrow B) acts on the latch body 2, the latch member 4b of the slider body 4a maintains the latched state of latching the convex portion 20a of the push rod 20, so Maintains a strong connection with the other object.

When the acceleration indicated by the arrow B in FIG. 6 disappears, the links 32 and 33 of the link member 31 are centered on the shafts 7a and 7b by the urging force of the return spring 40 that is the plate initial position return means. It rotates counterclockwise, and then comes into contact with the stopper 50 that engages with one end of the link 32 and returns to the initial position.

Needless to say, at the initial position of the plate member 30, the engagement between the engagement hole 30b and the pin 11a is released, as shown in FIG.

[0041]

[Effect of device]

 As described above, according to the push-latch device with an acceleration sensor of the present invention, a plate material that can move in parallel is used as the acceleration detecting means, and the slider that moves in parallel when acceleration is applied to the latch body is used. The movement of the latch of the positioning means is regulated to lock the movement of the latch slider, so that the latch release at the tip of the push rod is regulated. It is possible to further reduce the size of the push-latch device with an acceleration sensor, and it is also possible to provide a lightweight push-latch device with an acceleration sensor because a heavy steel ball is not used as in the past.

[Brief description of drawings]

FIG. 1 is a conceptual side sectional view showing a push latch device of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a conceptual sectional view showing an operation of a slider positioning means.

FIG. 4 is a sectional view taken along line CC of FIG.

FIG. 5 is a conceptual sectional view showing the operation of the acceleration detecting means.

FIG. 6 is a conceptual side sectional view showing the operation of the speed detecting means.

FIG. 7 is a conceptual sectional view showing the operation of the acceleration detecting means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Push latch device with an acceleration sensor 2 ... Latch main body 4 ... Latch slider 4a ... Slider main body 4b ... Latch part 5 ... Slider positioning means 6 ... Acceleration detection means 10a, 10b ... Cam groove 11 ... Cam 11a ... Pin 12 ... Shaft 13 ... arm 15 ... slider initial position returning member (coil spring) 20 ... push rod 30 ... plate material 30b ... engaging hole 31 ... link member 40 ... plate material initial position returning means (coil spring)

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Creator Taro Kawahara 2-19-11 Chuo, Kasukabe City, Saitama Prefecture

Claims (3)

[Scope of utility model registration request] 1. A push rod fixed to one object, and a latch body fixed to the other object for latching and releasing the push rod tip, wherein the push rod tip latch and its end are provided. A latch slider that is formed to perform a releasing operation and reciprocates according to the push motion of the push rod, and an initial position and a latch that cause the latch slider to release the latch at the tip of the push rod according to the push motion of the push rod. Slider positioning means including a cam mechanism for positioning the latch slider to the initial position, a slider initial position returning member for returning the latch slider which has reached the latch position to the initial position, and acceleration detection for locking the movement of the latch slider when acceleration is applied. And a latch body having a means. In the push latch device with a sir, the cam mechanism of the slider positioning means engages with a cam groove formed on the upper surface of the latch slider along the cam groove to release the latch at the tip of the push rod of the latch slider. The acceleration detecting means is composed of a cam for positioning at an initial position and a latching position, and the acceleration detecting means has a plate material having an engaging hole for engaging with the cam of the slider positioning means, and the plate material is substantially parallel to the latch slider. In addition to supporting
When acceleration is applied to the latch body, the plate member is moved from its initial position in a substantially parallel manner along the latch slider, thereby engaging the engagement hole of the plate member and the cam of the slider positioning means. When the link member that restricts the movement of the cam along the cam groove and the acceleration applied to the slider body disappear, the plate member is returned to the initial position through the link member, and the engaging hole of the plate member is formed. A push latch device with an acceleration sensor, comprising plate material initial position returning means for releasing engagement of the slider positioning means with the cam. 2. The cam groove has a heart shape, and the cam is composed of a cylindrical projection formed at the tip of an arm rotatably supported about a shaft, and the projection is provided above the projection. The push latch device with an acceleration sensor according to claim 1, wherein a pin that engages with the engagement hole is provided in a protruding manner. 3. The link member according to claim 1, wherein the link member is composed of a pair of links rotatable about an axis, and the link supports the plate member in parallel at an upper portion thereof. Push latch device with acceleration sensor.