JPH0317787Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a dispensing pencil-type cosmetic product with a protection mechanism that prevents breakage of the cosmetic core.

[Conventional technology and its problems]

Stick-shaped cosmetics such as lipsticks and eye shadows generally consist of a rotary cylinder with a helical groove on its inner periphery, and a core-holding shaft that engages with the helical groove inside the rotary cylinder and moves back and forth in a non-rotational manner. The cosmetic core is held at the tip of the holding shaft via a core chuck. When using it, you apply makeup by drawing out the tip the required length and rubbing it onto the desired area, but especially if the tip is soft and thin like eyeshadow, it is especially difficult to draw it out too long. There is a problem in that if you rub the pen with more than a predetermined pressure, the lead will easily break. This is because the cosmetic core is the core chuck - holding shaft.
Because it is supported by a helical cylinder, a solid structure with no play in the axial direction, if a strong force is applied to the tip of the core, there is no escape, and in the end, the core itself, which is softer than the solid structure, has no choice but to break. .

In particular, cosmetics such as eye shadows have traditionally been commonly used in cosmetics called pencils, which have a core fixed inside a wooden shaft.In this case, even the soft core was relatively hard to break, so consumers who were accustomed to this were accustomed to using pencils. When using pencil-type cosmetics made in imitation, apply more pressure than the specified amount and break the lead.
There were many problems with careless handling, such as dropping cosmetics and breaking the core.

[Purpose of invention]

The present invention was made to solve the above-mentioned problems, and its purpose is to apply a predetermined amount of pen pressure (makeup To provide a dispensing pencil-type cosmetic product having a protection mechanism (or buffer mechanism) that prevents the core from breaking even when a strong force such as the force used when drawing with the core is applied.

[Summary of the idea]

In order to achieve the above object, the present invention uses the solid support structure itself consisting of the core chuck, holding shaft, and helical cylinder as being made of a harder material than the core, as in the past, and without changing its strength or hardness, the solid support structure as a whole can exceed a specified level. When an axial force is applied to the lead, the lead can elastically contract in the axial direction, and is provided with a protection or buffering mechanism for the excessive writing pressure and impact applied to the lead.

Specifically, the present invention has a tip tube constituting a pencil-type dispensing cosmetic product, and a rotary tube fitted to the tip so as to be relatively rotatable. The short spiral tubes are fitted together, and the rotating tube and the spiral tube always rotate together when rotating, but are movable relative to each other in the axial direction, and the rear end of the spiral tube and the rear end of the rotating tube are In between, there is an elastic member that is not compressed by normal writing pressure, but is compressed in the axial direction by more force. It is made so that it is in contact with the As a result, when a force exceeding a predetermined level is applied to the drawn-out core, the elastic member is compressed before the core breaks, so that the lead, its holding shaft, and the helical tube with which it engages are separated from the leading tube. It also retreats in the axial direction relative to the rotating shaft, allowing excessive force to escape.

The helical cylinder and the core holding shaft are connected by engaging a male thread-shaped protrusion formed on a part of the holding shaft with a helical groove formed on the inner circumference of the helical cylinder, but the holding shaft rotates as the helical cylinder rotates. In order to move linearly forward and backward without being bent, the holding shaft has a non-circular cross-section, for example, a triangular or oval shape, and an inner hole with a similar cross-sectional shape is formed inside the tip cylinder to insert the holding shaft. It's good to do that.

If the helical groove is left open at both ends of the helical cylinder, the holding shaft protrusion will come off the helical groove at the forward limit (maximum lead-out of the core) and backward limit (maximum retraction of the core) of the holding shaft. According to the present invention, since the rear end of the helical tube is always elastically pushed forward, at the forward limit, instead of the holding shaft protrusion that hits the inner end of the front tube and cannot move forward any further, the helical tube itself is pushed backward. In addition, at the limit of retraction, the elastic member is pressed and the holding shaft protrusion itself comes off from the helical groove. In this way, a clutch action is achieved which disconnects the transmission of rotational force to the core holding shaft in order to prevent the rotary delivery mechanism from being destroyed by excessive rotation at the extreme position. After being separated, the compressed elastic member immediately returns to its original state, so that the detached holding shaft protrusion and helical cylinder come into contact again, producing a clicking or snapping alarm sound.
Such a clutch action and alarm action are second to the core protection action as features of the present invention.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. In Figure 1, the cosmetic of the present invention has a tip tube 1.
and a rotary cylinder 3 which is fitted to this with an annular unevenness 2 so as to be relatively rotatable. The outer surface of the tip tube 1 is tapered to form a pencil shape. The front cylinder 1 and the rotary cylinder 3 cannot be moved relative to each other in the axial direction. On the inner periphery of the rotary cylinder 3, there is a
As clearly shown in (line cutting), several axial protrusions 3a are provided. The rear end 3b of the rotary cylinder 3 is closed. Inside the rotary cylinder 3, there is a helical cylinder 5 having an axial groove 5a on the outer circumference that engages with the protrusion 3a.
is inserted. As can be seen from FIG. 1, the length of the helical tube 5 is shorter than the length between the inner end 1b of the front tube 1 fitted into the rotary tube 3 and the rear end 3b of the rotary tube. is axial unevenness line 3
It can slide in the axial direction within the rotary cylinder 3 via a and 5a. A helical groove 5 is formed on the inner circumference of the helical tube 5.
b is formed, and the front and rear ends of the helical groove are open. A gasket 4 is in contact with the rear end of the helical cylinder 5. The gasket 4 can also slide along the inner periphery of the rotary cylinder 3, as will be described later.

Reference numeral 6 denotes a core holding shaft, which has a male screw-like protrusion 6b formed at its rear end to engage with the helical groove 5b, and a tip 6a.
is formed with a claw as a core chuck as shown in FIG. 5 (cut along the line B--B in FIG. 1), and extends into the inner hole 1a of the front barrel 1. As can be seen from FIG. 5, the shaft portion of the core holding shaft 6 has a triangular cross section, and correspondingly, the front cylinder inner hole 1a has a triangular cross section. For this reason, the core holding shaft 6 cannot rotate, and the rotational force of the rotary tube 3 and the helical tube 5 is transmitted to the core holding shaft 6 as a linear motion force. A core 7 is held at the tip 6a of the holding shaft.

The cross-sectional shape of the lead holding shaft and the inner hole of the tip cylinder is not limited to a triangular shape, but may be a polygonal shape such as a pentagon or a hexagon, or a non-circular shape such as an elliptical shape or an elliptical shape as shown in FIG. It may also have a rotating shape.
In FIG. 6, reference numeral 11 denotes a front cylinder, whose outer periphery is circular and fits into the inner periphery of the rotary cylinder 3, but the inner hole 11a is elliptical, and therein is also an elliptical core holding shaft 16.
is penetrated. 16a is a claw serving as a core chuck.

In the example shown in FIG. 6, the core has a flat cross-sectional shape, although it is not shown, which is convenient because it can distinguish between thick and thin.

An elastic member 8 is disposed between the rear end of the helical tube 5 and the rear end 3b of the rotating tube 3. In the illustrated embodiment, the elastic member 8 is a coil spring inserted in contact with the packing 4 and the inner wall of the rear end 3b. The strength of the elastic member 8 is such that it cannot be compressed by a force comparable to normal writing pressure, but can be elastically compressed by a force greater than that in the axial direction. The elastic member 8 normally presses the helical cylinder 5 forward and presses its front end against the inner end 1b of the leading cylinder.

The operation of the cosmetic product of the present invention having the above structure will be explained with reference to FIGS. 2 and 3. first,
In FIG. 1, when the leading tube 1 is held with the fingers of the left hand and the rotating tube 3 is held with the fingers of the right hand and rotated, the rotating tube 3 and the helical tube 5 rotate together, and the holding tube 6 is held in a non-rotating position. The core 7 protrudes as shown in FIG. 2. In this state, when drawing an eye shadow by applying the lead 7 to a target area with normal writing pressure, the lead 7, holding shaft 6, and helical cylinder 5 are supported from behind by an elastic member 8 with a predetermined pressure. ,
I can apply makeup without any problems. However, when a force (pen pressure) stronger than normal is applied to the lead 7, that force is immediately transmitted to the helical tube 5 via the protrusion 6b of the holding shaft 6. If the helical tube 5 is not restrained by the rotating tube 3 on its outer periphery, it will be rotated by this backward axial force.
3, the helical tube 5 cannot rotate, and the axial force is linearly transmitted to the elastic member 8 through the packing 4, and the helical tube 5 retreats as shown in FIG. The sexual member 8 is compressed. A gap S is formed between the front end of the helical cylinder 5 and the inner end 1b of the leading cylinder. In this way, when the core 7 receives a strong force greater than the predetermined strength set in the elastic member 8,
It retracts easily and is protected from breakage. When the strong writing pressure is removed, the elastic member 8 immediately returns to its original state and pushes the helical tube 5, holding shaft 6, and lead 7 forward, causing the lead 7 to protrude to its original length (Fig. 2). .

In addition to the protection or buffering effect described above, the combination of the sliding helical tube 5 and the elastic member 8 of the present invention also serves as a clutch to prevent the rotary delivery mechanism from being destroyed. FIG. 7 shows the clutch action at the forward limit position. If the rotary cylinder 3 is turned too far, the holding shaft protrusion 6b will be disengaged from the front end of the helical groove 5b, and it will be moved further forward, but at that time the leading cylinder Since its forward movement is blocked by the inner end 1b, the helical tube 5 is pushed backward against the force of the elastic member 8. If the connection is broken in this way, any further rotation of the rotating cylinder/spiral cylinder will result in idle rotation, and accidents such as damage due to excessive force being applied to the helical groove or holding shaft can be prevented. Further, as shown in Fig. 7, the helical tube 5 that has been pushed backward is immediately pushed back forward by the resilient force of the elastic member 8, and the front end of the helical tube collides with the inner end of the tip tube, making a clicking sound. This serves as an alarm sound for the user.

Figure 8 shows when it is returned too far in the opposite direction (retreat extreme position)
At this time, the holding shaft protrusion 6b is removed from the rear end of the helical groove 5b by rotating the helical cylinder 5 too much, and the straight packing 4-
Retract the elastic member 8. If it comes off as shown in FIG. 8, the rotational force will not be transmitted to the holding shaft 6, and both the helical cylinder and the holding shaft will be protected from destruction. Since the compressed elastic member 8 tries to return immediately, the protrusion 6b and the spiral tube 5 collide with each other, producing the same alarm sound.

Even if the retaining shaft protrusion comes off from the helical tube at such an extreme position, when it is returned to its original position by the elastic member, the protrusion is pressed toward the helical groove, a line segment with a certain extent, so that it cannot be reengaged. It's easy and sure.

[Effect of idea]

According to the present invention, the helical cylinder can be rotated and slid in the axial direction within the cylinder, and it is always pressed forward from the rear by an elastic member of a predetermined strength, so that the drawn-out cosmetic core can be moved in the axial direction. When excessive writing pressure is applied, the lead retracts immediately, preventing breakage. If the wick breaks, you have to hold it with both hands and try to feed it out again, but according to this invention, the retracted wick will return to its original position immediately after the strong force is removed, allowing you to continue applying makeup without any interruptions. , you can achieve beautiful makeup without missing the desired shape or feeling frustrated. Furthermore, by standardizing the predetermined strength of the elastic member, it is also possible for consumers to experimentally learn the preferred standard writing pressure when applying makeup.

Furthermore, the combination of the sliding helical tube and the elastic member of the present invention acts as a clutch to disconnect the rotational force at both the forward and backward extreme positions of the feeding rotation operation, thereby preventing damage to the rotating feeding mechanism due to excessive force. At the same time, there is also the effect of notifying the user of the extreme position by means of an alarm sound.

Moreover, unlike re-engaging the helical tube and the core holding shaft protrusion separated in this way point-to-point, the helical tube has a receiving area with a certain extent, so it is easy and reliable. Reengagement is obtained.

In addition, in the present invention, the shaft portion of the core holding shaft has a triangular cross-section, other polygonal shape, or oval shape, and the inner hole of the corresponding tip cylinder has a similar triangular, other polygonal, or oval cross-sectional shape. By doing so, it is possible to omit separate parts such as groove pipes, which are conventionally often used to convert rotational force into linear force, reducing the number of parts and processes, lowering costs, and improving the structure. The effect of simplifying and eliminating the possibility of malfunction etc. is achieved.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the dispensed pencil-type cosmetic with a lead protection mechanism of the present invention, Fig. 2 is a longitudinal cross-sectional view showing the cosmetic with the lead slightly extended, and Fig. 3 A vertical cross-sectional view showing a state in which the core has retreated due to the protection mechanism acting when a strong force is applied, Figure 4 is an enlarged cross-sectional view taken along the line A-A in Figure 1, and Figure 5 is the line B-B in Figure 1. Fig. 6 is an enlarged sectional view showing a modification of the portion corresponding to Fig. 5;
The figure is a partial sectional view illustrating the clutch action at the extreme forward position in the cosmetic product of the present invention, and FIG. 8 is a partial sectional view illustrating the clutch action at the extreme backward position. Main symbols, 1... Lead tube, 3... Rotating tube, 3a... Axial protrusion, 3b... Rear end, 5... Spiral tube, 5a... Axial groove, 5b... Spiral groove, 6... Core holding shaft, 6a
...Tip (core chuck), 6b...Male thread-like projection, 7
...Cosmetic core, 8...Elastic member.

Claims (1)

[Claims for Utility Model Registration] An axially extending protrusion 3a is formed on the inner periphery of the rotating cylinder 3 which is fitted to the front cylinder 1 so as to be relatively rotatable, and an axially extending concave line that fits with the axially extending protrusion 3a. 5a formed on the outer periphery and which is shorter than the axial length inside the rotating cylinder 3, is slidable in the axial direction within the rotating cylinder,
However, it is inserted so that the rotational force from the rotating tube is transmitted at all times, and a spiral groove 5b that is open at both ends is formed on the inner periphery of the spiral tube 5, and a male screw-shaped projection 6b that engages with the spiral groove. The shaft portion of the lead holding shaft 6 having a rear end thereof is formed to have a triangular cross-section, other polygonal or oval cross-section, and an inner hole 1a having a corresponding cross-sectional shape is bored in the front tube 1 to hold the core. The shaft portion of the holding shaft is inserted from inside the helical cylinder to the inner hole, and the cosmetic core 7 is held at the tip 6a of the core holding shaft, and the cosmetic core 7 is not subjected to an axial force above a predetermined pressure that is normally applied to the cosmetic core 7. An elastic member 8, which is compressed by this, is arranged in contact with the packing 4 disposed at the rear end of the helical tube 5 and the inner wall of the rear end 3b of the rotating tube. Place the front end at the inner end of the tip tube 1
b, and when an axial force of more than a predetermined pressure is applied from the tip of the cosmetic core 7, the rear end of the helical cylinder compresses the elastic member and the rear end of the spiral cylinder The end 1b and the front end of the helical tube are separated, and when the helical tube is rotated beyond the forward limit, the male threaded protrusion of the core holding shaft comes off from the front end of the helical tube, and the rear end of the helical tube detaches the male threaded projection of the core holding shaft. When the elastic member is compressed through the packing, or when the helical tube is rotated beyond the retraction limit, the male threaded protrusion of the core holding shaft that has come off from the rear end of the helical tube is compressed through the packing. A dispensing pencil-type cosmetic product with a core protection mechanism characterized by compressing an elastic member.