JPH0353710Y2 - - Google Patents

Description

[Detailed description of the invention] (Purpose of the invention) This invention relates to a spray head with a protective cap for containers, such as aerosol injection containers and extrusion containers, that emit propellant by pressure against the propellant inside the container. In such a situation, the nozzle protruding outside the protective cap can be completely retracted after use.
Moreover, the purpose is to provide a simple structure.

(Structure of the device) This device will be explained below with reference to an illustrated embodiment. Reference numeral 11 denotes a valve stem of a container 1 that accommodates a propellant. It is constantly receiving upward thrust from the valve spring of the injection valve. This invention consists of a push button 2 fitted to the top end of the valve stem 11, a protective cap as described below, and a push cover 4.
It has a long history.

The push button 2 is provided with a nozzle that engages the push cover 4 and has an injection passage 21 connected to the valve stem 11, and this nozzle is integrally molded with a base fitted to the valve stem 11. A base tube 25 and a beak tube 2 fitted into the base tube 25 so as to be able to move forward and backward.
6, and the beak tube 26 is provided with a cam rod 27.

The above-mentioned protective cap consists of an inner cylinder 31 whose skirt portion is fixed to the container 1, and an outer cylinder 32 which is rotatably fitted onto the inner cylinder 31.

The cover 4 is slidably supported on the top edge 33 of the inner cylinder 31 by several guide pieces 41 protruding from the circumferential surface, and is engaged with the outer cylinder 32 in a relatively non-rotatable manner. ing. That is, according to the illustrated example, 1
Since the vertical folds 39 protrude from the upper part of the outer cylinder 32 with respect to the pair of guide pieces 41, 41, sandwiching these guide pieces, the press lid 4 cannot rotate relative to the outer cylinder 32.

The inner cylinder 31 has a long window hole 34 through which the beak tube 26 can be inserted.
and a receiving groove 3 for receiving the guide piece 41.
8 is bored into the top edge 33. The position where the receiving groove 38 is bored corresponds to the injection angle position A of the outer cylinder 32 shown in FIGS. 1 and 2, and the injection angle position A will be described later. Further, the inner cylinder 31 is provided with a grooved cam 5 having a cam groove 51 for receiving the cam rod 27 of the beak tube 26.

The outer cylinder 32 of the protective cap described above is connected to the operation port 3.
As can be seen from FIGS. 1 and 2, a small window hole 37 through which the beak tube 26 can be inserted is also bored. In addition, the outer cylinder 32
From the injection angle position A where the small window hole 37 and the long window hole 34 overlap at one end of the long window hole 34 (see especially FIG. 2), the small window hole 37 and the inner cylinder as shown in FIG. 32 has an angular movement range up to the closed position C where they overlap with each other, but during this angular movement, the small window hole 37 and the long window hole 34 overlap at the other end of the long window hole 34. Although not shown, it will be understood that there are matching angular positions. This angular position is referred to as a stowed angular position because the nozzle is accommodated in the outer cylinder 32 at this angular position, as will be described later.

As mentioned above, the beak tube 26 is fitted into the base tube 25 of the nozzle so that it can move forward and backward.
From the forward position where the beak end 23 advances outward from the small window hole 37, to the retracted position where the beak end 23 is located within the cylindrical wall of the outer cylinder 32 at the above-mentioned retracted angle position B, and at the closed angle position C, The beak end 23 has a linear movement range up to a retracted position located within the wall of the inner cylinder 31.

The cam groove 51 of the grooved cam 5 cooperates with the cam rod 27, and the shape of the cam groove 51 allows the beak tube 26 to move in the circumferential direction and in response to the rotation of the outer cylinder 31 in the above-mentioned angular movement range. The shape must allow for radial movement.

According to the illustrated embodiment, guide fins 28 and 29 are provided at the base of the push button 2 and the beak tube 26, respectively.
A pair of frame plates 42 provided on the lower surface of the push lid 4,
By sandwiching these guide fins 28 and 29 with 43, the rotation of the outer cylinder 32 is transmitted to the beak tube 26 via the push cover 4, and the thrust force to the push button 2 due to the depression of the push cover 4 is transmitted. communication is facilitated.
Further, according to this embodiment, the tip of the base tube 25 of the nozzle is formed into a thin wall so that the pressure inside the beak tube 26 during injection is used to press the thin portion against the inner wall of the beak tube 26. Possibly the base tube 2 during injection.
5. Prevents liquid leakage between the beak tubes 26. Also,
By providing the escape window 52 in the grooved cam 5, some elasticity is imparted to the groove wall of the cam groove 51, thereby facilitating the smooth operation of the cam rod 27.

This device is constructed as described above, and the palate 4 is supported on the top edge 33 of the inner cylinder 31 by several guide pieces 41 protruding from the circumferential surface. The outer cylinder 32 is not rotatable relative to the outer cylinder 32, and the outer cylinder 32 at the injection angle position A described above is
Since the receiving groove 38 of the guide piece 41 is bored in the inner cylinder 31 at the corner position of the lid 4 corresponding to the corner position A, the lid 4 can be lowered at the injection angle position A. On the other hand, at the injection angle position A described above, the small window hole 37 overlaps with the long window hole 34 at one end of the long window hole 34, and the beak tube 26 has the beak end 23 at the injection angle position A with the small window hole 34. Since the valve stem 11 is in the forward position where it advances outward from the hole 37, when pressure is applied to the pusher cover 4 through the operating port 35 formed in the top wall 36 of the outer cylinder 32, the valve stem 11 is lowered via the pushbutton 2, and the valve stem 11 is lowered via the pushbutton 2. The projectile in the container 1 is then ejected through the injection passage 21 from the beak tube 26 protruding from the outer cylinder 32.

Next, when the outer cylinder 32 is rotated from the injection angle position A toward the closing angle position C, this rotational operation is performed as follows.
Since the information is transmitted to the push button 2 via the pusher cover 4 which is non-rotatably engaged with the outer cylinder 32 and the push button 2, the beak tube 26 also moves to the closed angle position as the outer cylinder 32 rotates. Move towards C. By the way, the beak tube 26 is engaged with a cam groove 51 of the grooved cam 5 fixed to the immovable inner cylinder 31 via a cam rod 51, and the cam groove 51 has an angular movement range when the outer cylinder 31 rotates. Since the beak tube 26 has a shape that allows the beak tube 26 to be guided in the circumferential direction and the radial direction in accordance with the
6 is guided by the cam groove 51 and gradually retreats.
At the stowed angular position B of the outer cylinder 32, the beak end 23 of the beak tube 26 is located within the wall of the outer cylinder 32, so even if the outer cylinder 32 continues to rotate from the stowed angular position B, the small window remains. The side edge of the hole 37 can continue its rotation without colliding with the beak tube 26. In the above-described closed angle position C, the small window hole 37 overlaps with the cylinder wall of the inner cylinder 32, and at the same time, the long window hole 34 of the inner cylinder 31 naturally overlaps with the cylinder wall of the outer cylinder 32. Since the operation port 35 of the outer cylinder 32 is closed by the pusher cover 4, all operating mechanisms such as the push button 2 and the nozzle are completely isolated from the outside at the closed angle position C of the outer cylinder 31 by the protective cap. At the same time, the guide piece 41 of the presser cover 4 disengages from the receiving groove 38 of the inner cylinder 31 due to the upward tension of the valve stem 11 after the depression is released, and as the outer cylinder 32 rotates. The angular movement of the presser cover 4 causes the guide piece 41 to engage with the top edge 33 of the inner cylinder, thereby supporting the presser cover 4.
It does not fall even if an external force is applied to the protective cap, thus preventing foreign matter from entering the inside of the protective cap, and there is no risk of erroneous injection due to external force.

To perform the injection operation again, the outer cylinder 32 is reversed to the injection angle position A, and as the push button 2 rotates, the grooved cam 5 guides the injection from the small window hole 37 that overlaps with the end of the long window hole 34. At the same time as the beak tube 26 protrudes, the guide piece 41 separates from the top edge 33 of the inner cylinder and moves to a position corresponding to the receiving groove 38.
Injection is performed by pressing the button.

Although the illustrated container 1 is an aerosol container that uses a liquefied gas propellant, this invention can of course be applied not only to aerosol containers but also to other suitable extruded containers, and has a wide range of uses. There is.

(Effects of the invention) That is, according to this invention, during injection operation, the nozzle protrudes outside from the protective cap, so the aim of the injection is well determined, and when not in use, the push button containing the nozzle is completely closed. The valve stem 11 itself is housed inside a protective cap, which prevents foreign matter such as dirt from entering the nozzle and other internal mechanisms, and provides a jet head that is free from the risk of erroneous jetting. Since it is used as a rotating shaft for angular movement, the mechanism is simple and the operation is reliable.Furthermore, it can be assembled from a small number of moldable parts, making it ideal for mass production.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional side view of an embodiment of this device at the injection position, Fig. 2 is a sectional view taken along the line XX in Fig. 3 is a sectional view taken along line X-X in Figure 5, Figure 5 is a beak tube, a is a plan view, b is a partial vertical side view, c is a bottom view, d is a rear view, Figure 6 is a push button, and a is a plan view. , b is a partially vertical side view, c is a bottom view, and d is a front view. 1 is a container, 11 is a valve stem, 2 is a push button, 21 is an injection passage, 23 is a beak end, 25 is a base tube,
26 is a beak tube, 27 is a cam rod, 28 and 29 are guide fins, 31 is an inner cylinder, 32 is an outer cylinder, 33 is a top edge, 34
35 is a long window hole, 35 is an operating port, 36 is a top wall, 37 is a small window hole, 38 is a receiving groove, 39 is a vertical pleat, 4 is a pusher cover, 4
1 is a guide piece, 42 and 43 are plate frames, 5 is a grooved cam, 5
1 is the cam groove, 52 is the relief window, A is the injection angle position, B
is the retracted angle position, and C is the closed angle position.

Claims (1)

[Scope of utility model registration request] It consists of a push button 2 fitted to the top end of a valve stem 11 of a container 1 that accommodates the propellant, an inner cylinder 31 whose hem is fixed to the container 1, and an outer cylinder 32 which is rotatably fitted onto the inner cylinder 31. A protective cap and a pusher cover 4 which is slidably supported on the top edge 33 of the inner cylinder 31 by several guide pieces 41 protruding from the circumferential surface and engages with the outer cylinder 32 in a relatively non-rotatable manner. The push button 2 engages with the push cover 4 and is provided with a nozzle having an injection passage 21 connected to the valve stem 11, the nozzle being connected to the valve stem 11.
The beak tube 26 consists of a base tube 25 that is fitted into the base and is integral with the base, and a beak tube 26 that is fitted into the base tube 25 so as to be able to move forward and backward.
6 is provided with a cam rod 27, the inner cylinder 31 has a long window hole 34 through which the beak tube 26 can be inserted, and the outer cylinder 32
A receiving groove 38 for receiving the guide piece 41 is bored in the top edge 33 at the corner position of the lid 4 corresponding to the injection angle position A described below, and the inner cylinder 31 is connected to the cam rod 2 of the beak tube 26.
The outer cylinder 32 has an operating port 35 in the top wall 36, a small window hole 37 through which the beak tube 26 can be inserted in the side wall, and The outer cylinder 32 moves from injection angle position A where the long window hole 34 of the inner cylinder overlaps with the small window hole 34 at one end, to the injection angle position A where the small window hole 37 overlaps with the long window hole 34 at the other end of the long window hole 34. It has an angular movement range beyond the matching storage angle position B to the closing angle position C where the small window hole 37 overlaps the cylinder wall of the inner cylinder 32, and the beak tube 26
At the injection angle position A, the beak end 23 is in the small window hole 3.
7, the beak end 23 moves outward from the retracted position where the beak end 23 is located inside the cylinder wall of the outer cylinder 32 at the retracted angle position B, and at the closed angle position C, the beak end 23 moves outward from the inner cylinder 31. The cam groove 51 of the grooved cam 5 cooperates with the cam rod 27, and has a linear movement range up to a retracted position located within the cylinder wall.
An injection head with a protective cap having a shape capable of guiding the beak tube 26 in the circumferential direction and the radial direction corresponding to the angular movement range in one rotation.