JPH0346140Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a ratchet structure that can maintain a predetermined locked position and smoothly release this locked position.

``Prior Art'' A ratchet structure consisting of a ratchet gear and a pawl is widely known, and by locking the pawl to the serrated ratchet teeth, it allows the gear to rotate in a predetermined direction and vice versa. It has the function of preventing rotation in the direction.

Therefore, in order to rotate the gear in the opposite direction, it is necessary to disengage the pawl from the ratchet tooth, which is time-consuming.

A typical configuration of a bag or case body for storing a specified item is one in which the main body and the lid are connected by a hinge so that they can be opened and closed. There are times when devices and the like inside the main body are operated, and there are times when it is necessary to set and maintain the open position of the lid at a predetermined angle.

In view of this, a bendable support rod is arranged near the hinge between the main body and the lid to maintain the desired open posture of the lid, but the opening angle is limited and the lid It was necessary to bend and extend the support rod to bring it into the open or closed position.

Therefore, if a ratchet structure is adopted instead of the support rod, the lid can be maintained in a step-by-step opening position, but as mentioned above, with the ratchet structure, it takes time and effort to release the lock between the ratchet teeth and the pawl. That's what I was doing.

"Problems to be Solved by the Invention" The present invention relates to a ratchet structure devised to eliminate the above-mentioned conventional drawbacks and inconveniences. The aim is to make it easy to achieve without having to do anything.

"Means for solving the problem" The ratchet structure of the present invention has a tooth body 1 and a pawl body 10.
It consists of

The tooth body 1 is a plate body having a predetermined wall thickness,
A circular arc circumferential surface 2 is formed in at least a part of this plate body, and a guide plate 6 is provided upright along the circumferential direction at a part of one side end of the circular arc circumferential surface 2. A cam plate 7 is continuously erected diagonally across the circumferential direction on the circular arc circumferential surface 2 from the terminal end to the other side end of the plate, and further on the circular arc circumferential surface 2 from the starting end to the terminal end of the guide plate 6. , a tooth group 9 is formed by protruding a plurality of ratchet teeth 8 at equal intervals.

Further, the pawl body 10 has a protruding locking piece 12 at its tip that rides over and locks the ratchet teeth 8 of the tooth group 9, and its base end is pivotally supported at a predetermined location.

Then, the side surface of the locking piece 12 of this claw body 10 is connected to the other end surface 3 of the cam plate 7 or the tooth body 1.
An elastic material 14 for making elastic contact with the tooth body 1 or the claw body 10 is disposed on either one of the tooth body 1 and the claw body 10.

"Operation" In the configuration described above, the tooth body 1 and the claw body 10 are arranged so as to have a constant relative displacement.

That is, the center O of the arc circumferential surface 2 of the tooth body 1 and the base end of the claw body 10 are always kept at a constant distance and are displaced relative to each other, and therefore the locking piece 12 at the tip of the claw body 10 is located on the arc circumferential surface. Since the tooth group 9 is formed on the circular arc peripheral surface 2, the locking piece 12 rides over and locks on any of the ratchet teeth 8, and the pawl body 10 or The tooth body 1 is prevented from displacing in the opposite direction, and the side surfaces of the locking piece 12 of the claw body 10 are in elastic contact with the guide plate 6 due to the elasticity of the elastic material 14. The lock is designed to prevent the lock from being released laterally.

Then, due to the relative displacement force applied to the tooth body 1 or the pawl body 10, the locking piece 12 is sequentially displaced over the ratchet teeth 8, and in the state where it is over the ratchet tooth 8 at the end of the guide plate 6, it is further displaced as described above. When a displacement force is applied, the side surface of the locking piece 12 of the claw body 10 comes into elastic contact with the cam plate 7 due to the elasticity of the elastic material 14, and is guided by the cam plate 7 and moves against the elasticity of the elastic material 14. 1 will be pushed out to the other end surface 3 of 1.

Therefore, the locking piece 12 comes off from the arcuate circumferential surface 2, so when a displacing force in the opposite direction is applied to the tooth body 1 or the claw body 10, the locking piece 12 does not lock to the ratchet tooth 8 but moves to the other end face 3. The guide plate 6 returns along the same line to a position corresponding to the starting end of the guide plate 6, and is pushed back to the starting end of the arc circumferential surface 2 by the elasticity of the bullet 14.

That is, the tooth body 1 and the pawl body 10 are maintained in a predetermined mutual posture by being engaged with the locking piece 12 and the ratchet tooth 8, and by the relatively applied displacement force,
The predetermined posture can be changed, and the engagement between the locking piece 12 and the ratchet tooth 8 can be released by simply continuing the displacement force without applying any special operation to the tooth body 1 or the claw body 10. body 1 or claw body 10
If a displacing force in the opposite direction is applied to it, it can be returned to its original position.

"Embodiments" Examples of the present invention will be described below with reference to the drawings.

The plate-shaped tooth body 1 is approximately fan-shaped, and the circular arc portion with an opening angle of about 120° from the center O, which is the approximately central portion thereof, is the circular arc circumferential surface 2. 2 start end is the start end face 4, and the other end face 3
A stepped portion 5 is provided concentrically with the arcuate circumferential surface 2 in a protruding manner near the center O.

The claw body 10 is pivotally supported at a predetermined location with a locking piece 12 at the tip and a shaft support 11 at the base end. Since it is movable, it is ensured that the locking piece 12 can get over the ratchet teeth 8.

The illustrated embodiment shows the case where the ratchet structure of the present invention is used in a portable electronic computer.

A keyboard and other devices are built into the container body 15, and a hinge 17 is attached to the base end of the container body 15.
A liquid crystal display is disposed on the inner surface of the board-shaped lid 16, which is assembled so as to be openable and closable via the lid. Therefore, it is necessary to open the lid 16 at a predetermined angle and operate the keyboard on the container body 15 while looking at the display.

The tooth body 1 is fixed in a predetermined position at the base end of the container body 15 with its center O coaxial with the hinge 17, and the claw body 10 has a base end shaft support 11 that is attached to the base end side of the lid body 16. A coil spring-like elastic member 14 is wound around the shaft 13 to elastically bias the proximal end of the claw body 10 in the direction of the tooth body 1.

Therefore, the proximal shaft support 11 of the claw body 10 is connected to the lid body 16.
Due to the opening/closing displacement of the tooth body 1 , the tooth body 1 is displaced circularly around the center O of the tooth body 1 overlapping the hinge 17 .

Now, the relationship between the tooth body 1 and the claw body 10 when the lid body 16 is closed is shown in FIG.

Here, the locking piece 12 of the claw body 10 is in elastic contact with the other end surface 3, which is the terminal end of the fan-shaped tooth body 1, in an attitude of riding on the stepped portion 5. When the lid body 16 is opened to the opening limit position in this position, the locking piece 12 is displaced elastically on the step portion 5 and comes into contact with the starting end face 4 which is the starting end of the fan-shaped tooth body 1.

Then, when a displacement force is applied to close the lid body 16,
The proximal shaft support 11 of the claw body 10 is displaced circularly around the center O of the tooth body 1, and the locking piece 12 rides over and locks on any of the ratchet teeth 8, so that the lid body 16 is in the desired opening position. is maintained, and the lid body 16 is not displaced in the opening direction (FIG. 3).

Next, when the desired operation on the keyboard is completed and the lid body 16 is closed, the locking piece 12
further climbs over the ratchet teeth 8, is guided by the cam plate 7, and is pushed out against the elasticity of the bullet 14 to the other end surface 3 of the tooth body 1, returning to the position shown in FIG. That is, the locking piece 12 is locked to the ratchet tooth 8 by simply closing the lid 16, and no special operation is required to release the locking piece 12.

``Effects'' As is clear from the above explanation, the ratchet structure of the present invention is composed of a tooth body and a pawl body, and the locking piece of the pawl body and the ratchet tooth of the tooth body are locked to each other in a predetermined posture. can be maintained and the predetermined posture can be changed by a relatively applied displacement force, and the locking can be achieved simply by further continuing the displacement force without applying any special operation to the teeth or claw bodies. If the latch between the piece and the ratchet tooth is released and a displacing force in the opposite direction is applied to the tooth or pawl, it can be returned to its original position.

Therefore, it has many excellent functions and effects, such as being extremely easy to operate and use, simple in structure, and easy to mold.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the ratchet structure of the present invention in a locked state. FIG. 2 is a perspective view of the removed state. FIG. 3 is a sectional view of an embodiment of the present invention with the lid opened. Fourth
The figure is a sectional view with the lid closed. Explanation of symbols: 1; Tooth body; 2; Arc circumferential surface; 3; Other end surface; 5; Step portion; 6; Guide plate; 7; Cam plate; 8; Ratchet tooth; 9; Tooth group;
0; Claw body, 12; Locking piece, 14; Bullet material, 15; Container body, 16; Lid body, 17; Hinge.

Claims (1)

[Scope of utility model registration request] A circular arc circumferential surface is formed on at least a portion of the plate body, a guide plate is erected on a part of one side end of the circular arc circumferential surface, and the circular arc extends from the end of the guide plate to the other side end of the plate body. A cam plate is continuously provided on the circumferential surface diagonally across the circumferential direction, and a plurality of ratchet teeth are protruded at equal intervals on the arcuate circumferential surface from the starting end to the terminal end of the guide plate to form a group of teeth. It has a formed tooth body, and a pawl body having a protruding locking piece at the tip that is secured by going over the ratchet teeth of the tooth group, and the side surface of the locking piece of the pawl body is connected to the cam plate or the teeth. A ratchet structure in which an elastic material that is brought into elastic contact with the other end surface of the body is disposed on either one of the tooth body and the claw body.