JPH0321710Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a push body locking device for an air pot.

[Conventional technology]

The pusher body of the air pump in the air pot is provided with a locking device for safety. The above-mentioned pusher is usually inserted so that it can slide vertically into a guide tube provided in the center of the outer cover, and is a locking member that is assembled into the outer periphery of the guide tube by operating a knob protruding from the top of the outer cover. is rotated, thereby locking or unlocking the pushing body.

The one shown in FIGS. 7 and 8 is an example of an air pot equipped with such a locking device (see Japanese Utility Model Application No. 57-94436).

In FIG. 7, 20 is an outer lid, 21 is a guide tube,
22 is a pushing body, 23 is a locking member, 24 is a knob,
25 indicates a bellows upper plate. A pusher body 22 is provided between the outer circumferential surface of the pusher body 22 and the inner circumferential surface of the guide tube 21.
Ribs 26 and 27 are provided to prevent rotation of the . The pusher body 22 has an outer cylinder 29 at its lower end with a collar 28 interposed therebetween. A locking hole 30 consisting of a narrow portion and a wide portion is formed on the upper surface of the outer cylinder 29 (see Fig. 8), and a locking pin 31 protruding from the lower surface of the locking member 23 is inserted into the locking hole 30 to lock it. A lock pin 31 is inserted into the narrow part of the hole 30.
When the locking member 23 is rotated so that it enters the wide area, the pushing body 22 is locked, and when it is rotated so that it enters the wide area, the lock is released.

[Problems to be Solved by the Invention] The pusher body 22 is inserted into the inner periphery of the guide tube 21, whereas the locking member 23 is provided at the outer periphery of the guide tube 21. In such a positional relationship, the pusher 2
In order to engage the pusher 22 with the lock member 23, a part of the pusher 22 is extended outward, such as by providing an outer cylinder 29 through the collar 28, as in the above conventional example, and the pusher 22 is engaged with the lock member 23. It is necessary to take a configuration in which the parts are engaged.

However, according to the above configuration, the guide tube 2
A space is required below the outer cover 20 on one outer periphery to accommodate the locking mechanism consisting of the outer cylinder 29 and the locking member 23.

The need for such a space means that the outer cover 20
There are restrictions when attempting to reduce the size by reducing the diameter of the outer cover 20, when changing the design of the outer cover 20, or when attempting to reduce costs by improving the outer cover 20.

Further, according to the above structure, since the locking member 23 is in the shape of a flat ring, in order to engage the pushing body 22 with the locking member 23, the lower end of the pushing body 22 is bent outward and raised. It is necessary to adopt a structure in which the outer cylinder 29 is formed by further bending downward, and the lock hole 30 formed in the top surface of the outer cylinder 29 is engaged with the lock pin 31 of the lock member 23. Therefore, there is a problem that the configuration of the pusher body 22 becomes complicated.

Therefore, the technical challenge of this invention is to make the above-mentioned space as small as possible by adding ingenuity to the locking structure of the pushing body, and to create an air pot with a simple structure of the pushing body. .

[Means to solve the problem]

In order to solve the above-mentioned problems, this invention forms a guide tube 2 on the outer cover 1, inserts the pusher body 4 of the bellows upper plate 15 into the inner periphery of the guide tube 2 so as to be able to slide freely, and the guide tube 2 A means for preventing rotation of the pushing body 4 is provided on the sliding surface of the pushing body 4, and a locking member 6 that can rotate by a certain angle in the circumferential direction is fitted on the outer periphery of the guide cylinder 2. engages in part,
In the push body locking device for an air pot, in which the lock member 6 is engaged with the push body 4 within a certain range of its rotational angle to be locked, the lock member 6 is provided with a cylindrical portion along the outer circumferential surface of the guide tube 2. 6'
A protrusion 9 protruding downward from the lower end of the guide cylinder 2 is formed on the outer circumferential surface of the lower end of the pushing body 4, and a lock pawl 10 protruding downward from the protrusion 9 is formed on the inner circumferential surface of the lower end of the cylindrical portion 6'. The lock pawl 10 is engaged with the lower surface of the protrusion 9 within a certain range of the rotation angle of the lock member 6.

[Effect]

When the locking member 6 is rotated to the locked position, the locking pawl 10 engages with the lower surface of each protrusion 9 of the pusher 4, so the pusher 4 cannot be pushed down.
When the locking member 6 is rotated to the open position, the locking pawl 10 separates from the lower surface of the protrusion 9, so that the pusher 4 can be freely pushed down to operate the air pump.

〔Example〕

As shown in FIGS. 1 and 2, the air pot equipped with the push body locking device according to this invention has the following features:
The center part of the upper surface of the outer lid 1 is open, and a guide tube 2 is provided to protrude downward from the periphery of the open part. A pusher body 4 is inserted into the inner periphery of the guide cylinder 2.

Vertical guide grooves 3 are formed at two centrally symmetrical locations on the guide tube 2, and guide ribs 5 protruding from the outer circumferential wall of the pusher 4 are slidably fitted into the guide grooves 3.

A lock member 6 is fitted onto the outer periphery of the guide tube 2. This locking member 6 is a cylindrical portion 6' of the guide tube 2.
has. The cylindrical portion 6' has a long hole 7 that is long in the circumferential direction, and a projection 8 provided on the outer periphery of the guide tube 2 is inserted into the long hole 7.
By forcibly fitting the lock member 6, the lock member 6 is prevented from slipping out, and is supported so that it can rotate by a certain angle in the circumferential direction.

Further, a guide tube 2 is provided on the outer circumferential surface of the lower end of the pusher 4.
A protrusion 9 is formed that protrudes downward from the lower end. Further, a lock pawl 10 is provided on the inner circumferential surface of the lower end of the cylindrical portion 6' of the lock member 6 so as to protrude below the projection 9 described above. Therefore, when the lock pawl 10 engages with the lower surface of the protrusion 9 as shown in FIG. 3, the pushing body 4 is locked and cannot be pushed down.

Further, the positional relationship between the protrusion 9 and the lock pawl 10 in a horizontal plane is as shown in FIG. That is, the projections 9 of the pushing body 4 are formed at four locations at regular intervals, and the lock pawls 10 are formed so as to be located in the gaps between the projections 9. Of the lock claws 10, a recess 11 is formed in the spout side claw indicated by reference numeral 10a, and when the pusher body 4 is pressed down, the guide rib 5 fits into the recess 11, and the lock is locked while being pressed down. The member 6 is prevented from rotating unnecessarily.

Also, the rear lock pawl 10b is connected to the other lock pawl 1.
0, and a protruding portion 12 formed behind the guide groove 3 of the guide cylinder 2 is located between the other lock pawl 10 and the protruding portion 12 is in contact with one of the lock pawls 10b. By providing a sufficient gap between the lock member 6 and the other adjacent lock pawl 10, the lock member 6 can be rotated within a certain range.

Note that the protruding portion 12' formed behind the guide groove 3 on the front side is formed at a higher position than the locking pawls 10, 10a, and 10b, so on the front side, the above-mentioned configuration, that is, the spacing between the pawls A structure is not adopted in which the portion 12' is fitted into the portion 12' by widening the portion 12'.

In addition, the reference numeral 13 in the figure is an operating knob for the locking member 6, and 14 is a display plate for locking and unlocking. is attached so as to face the lower surface of the window hole 14'.

In addition, 15 in the figure is the upper plate of the bellows 16',
The upper plate 15 has a conical part 16 in the center, and a peripheral wall 17 is protruded from the outer peripheral edge of the conical part 16. , is fitted into a recess between the conical portion 16 and the peripheral wall 17, and is constructed so that the height of the entire outer lid 1 is as low as possible.

The embodiment of this invention has the above configuration,
Next, its effect will be explained.

Now, when the knob 13 is operated to lock it, the locking member 6 rotates by a certain angle,
As shown in FIGS. 3 and 5, the lock pawl 1
0, 10a, and 10b overlap the lower surface of each protrusion 9 of the pusher 4, so the pusher 4 is locked.

Also, when the knob 13 is operated to release the lock, the lock claws 10, 10
Since the engagement between a and 10b and each protrusion 9 is disengaged, the air pump can be operated by pushing down the pusher body 4. Since the guide rib 5 of the pushing body 4 fits into the guide groove 3, rotation of the pushing body 4 is always prevented, and when the pushing body 4 starts to descend, the guide rib 5 engages with the locking claw. 10a recess 1
1, the rotation of the pushing body 4 is prevented while it is pressed down. When the pusher 4 is pushed down from the state shown in FIG.
6' is compressed. In the most deeply compressed state, the bellows top plate 15 approaches the bellows bottom plate (see FIG. 4).

In the above embodiment, the two front and rear guide ribs 5 are used to prevent the pushing body 4 and the locking member 6 from rotating while it is being pushed down, but for example, the rear guide rib 5 is omitted and the front These functions can also be achieved by the 51 guide ribs.

[Effect of idea]

As described above, this invention locks the pusher 4 by engaging the protrusion 9 of the pusher 4 and the lock pawl 10 of the locking member 6 below the lower end of the guide tube 2. The pusher body 4 has the advantage that it can have a simple shape, such as a cylindrical body with the upper part closed and provided with guide ribs 5 and protrusions 9. Also,
The locking mechanism constituted by the mutual engagement between the lower end of the pusher 4 and the lower end of the locking member 6 does not exist outside the locking member 6;
Space A below the outer cover 1 on the outside of the (see Figure 3)
can be made as small as possible, and the design of the outer lid 1 can be determined without being restricted by the size of the space A.

[Brief explanation of drawings]

Fig. 1 is a partially omitted sectional view of an air pot equipped with the locking device of this invention, Fig. 2 is a partially omitted exploded perspective view of the outer lid portion of the same, and Fig. 3 is a partially omitted sectional view of the outer lid portion. , Fig. 4 is a partially enlarged view of the pushing body in the depressed state, Fig. 5 is a cross-sectional plan view of the locked state, Fig. 6 is a transverse plan view of the unlocked state, and Fig. 7
The figure is a sectional view showing a part of the conventional example, and FIG. 8 is a perspective view showing a part of FIG. 7. 1...Outer cover, 2...Guide cylinder, 3...Guide groove, 4
... Push body, 5 ... Guide rib, 6 ... Lock member,
7...Long hole, 8...Protrusion, 9...Protrusion, 10,1
0a, 10b...Lock claw, 11...Recess, 1
2, 12'...protruding part.

Claims (1)

[Scope of utility model registration request] A guide tube 2 is formed on the outer lid 1, and the pusher body 4 of the bellows upper plate 15 is slidably inserted into the inner periphery of the guide tube 2, and the pusher body 4 is inserted into the sliding surface between the guide tube 2 and the pusher body 4. A locking member 6 is provided on the outer periphery of the guide cylinder 2 and is rotatable by a certain angle in the circumferential direction.
A pusher lock in an air pot, in which the locking member 6 is engaged with a part of the outer cover 1, and the locking member 6 is engaged with the pusher 4 within a certain range of the rotation angle to lock it. In the device, the locking member 6 is provided with a cylindrical portion 6' extending along the outer circumferential surface of the guide tube 2, and a protrusion 9 is formed on the outer circumferential surface of the lower end of the pushing body 4 to protrude downward from the lower end of the guide tube 2. A lock pawl 10 is formed on the inner circumferential surface of the lower end of the cylindrical portion 6' and protrudes below the projection 9, and the lock pawl 10 is engaged with the projection 9 within a certain range of the rotation angle of the lock member 6. Features a locking device for the pusher in the air pot.