JPH0446574Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a structure for attaching a strap to a thermos flask, and the strap can be attached and detached extremely easily.

As is well known, portable thermos flasks are provided with straps for convenient carrying. Conventionally, in this type of thermos flask, the structure for removably attaching the strap to the body of the thermos was to provide metal annular members at the original axially symmetrical positions, pass the ends of the straps through each annular member, and attach the straps to the end. Known structures include a structure in which one end of the part is fastened using a sardine and the other end is fastened with a drum button, and a structure in which both ends are fastened with a sarkant. However, all of these conventional mounting structures have the problem that it takes a lot of effort to attach and detach the strap from the thermos bottle body.

This idea was made in view of the above circumstances,
The strap can be attached and detached very easily with a single touch, and the attachment and detachment part has a good appearance, has a simple structure and is easy to manufacture, is easy to implement, has good operability, and the strap attachment part fits well Another object of the present invention is to provide a good mounting structure for a thermos flask strap.

This invention will be described in detail below with reference to the drawings.

Figures 1 to 4 show a first example of the mounting structure of this invention, and reference numeral 1 in the figures indicates that an outer cylinder 2 and an inner cylinder 3, which are made of metal cylinders with a bottom, are connected at their mouths. This is a metal thermos body that is welded together, the space between the inner and outer cylinders is evacuated, and a vacuum insulation layer 4 is formed. A protective cylinder 6 made of plastic that extends to the mouth of the thermos bottle body 1 is provided integrally with the outer cylinder 2 on the upper shoulder 5 of the thermos main body 1. A lid 7 is screwed on.

Portions of the protective cylinder 6 at opposing positions in the circumferential direction bulge outward in the radial direction to form a strap engaging body 8. That is, the second
As shown in the figure, an insertion hole 9 having a rectangular cross section is provided in the bulging portion of the protective cylinder 6, passing through the bulging portion in the vertical direction of the thermos bottle body 1.
Furthermore, a prismatic cavity 10 whose longitudinal direction is orthogonal to the insertion hole 9 is formed in the bulged portion. A locking protrusion 1 is provided within this cavity 10.
1 is housed so as to be movable in the longitudinal direction of the cavity 10, that is, in the radial direction of the main body 1.

This locking protrusion 11 is a prismatic body inscribed in the cavity 10, and an engagement hole 12 having the same cross-sectional shape as the insertion hole 9 and penetrating the thermos bottle body 1 in the vertical direction is located approximately in the center thereof. It is formed. Further, a small prismatic pressing portion 13 is integrally provided at the end of the locking protrusion 11 on the radially outer side of the main body 1, and a small prismatic pressing portion 13 is integrally provided on the radially inner side of the main body 1. A U-shaped groove 14 is formed. Furthermore, a coil spring (spring member) 15 is housed in the U-shaped groove 14, and is configured to bias the entire locking protrusion 11 radially outward of the main body 1 within the cavity 10. In addition, a part of the strap engaging body 8 consisting of the above-mentioned bulged portion has
A through hole 16 is formed so that the pressing part 13 of the locking protrusion 11 is exposed to the outside, and the locking protrusion 11
A pressing portion 13 projects to the outside of the strap engaging body 8. In addition, numeral 17 in the figure is a pressing member that presses down the coil spring 15.

As a result, the pressing portion 13 of the locking protrusion 11 is pressed from the outside of the protective cylinder 6, and the locking protrusion 11 retreats inward in the radial direction of the main body 1 against the elastic force of the coil spring 15. When the tip of the pressing part 13 is flush with the outer surface of the protective cylinder 6, the insertion hole 9 and the engagement hole 12 of the locking protrusion 11 align to form one continuous hole. The dimensions and shape of each part of the locking protrusion 11 are determined as follows.

Further, reference numeral 18 in the figure is a strap made of plastic, vinyl-covered cloth, leather, or the like.
The tip of the strap 18 is passed through a strap attachment plate 19 and is fastened with a caulking button 20. The strap mounting plate 19 has a width and a thickness that corresponds to the insertion hole 9 of the strap engaging body 8.
Its length is slightly larger than the vertical length of the bulged portion. The strap mounting plate 19 has a rectangular locking groove 21 provided in the width direction at a position slightly lower than the center portion in the longitudinal direction. The depth of this locking groove 21 is approximately half the thickness of the mounting plate 19, and its width is the same as the vertical thickness of the locking protrusion 11. Further, the tip of the strap mounting plate 19 is chamfered in its thickness direction to facilitate insertion into the insertion hole 9.

Next, the operation of attaching and detaching the strap 18 to and from the thermos bottle body 1 using the strap mounting plate 19 and strap engaging body 8 constructed in this manner will be described.

First, the strap 18 is attached to the thermos bottle body 1 by pushing the strap attachment plate 19 into the insertion hole 9 of the strap engaging body 8.
When the strap mounting plate 19 is forcefully pushed into the insertion hole 9 from above, the tip of the mounting plate 19 is inserted into the engagement hole which is not fully opened due to the misalignment between the insertion hole 9 and the engagement hole 12 of the locking protrusion 11. Enter 12. At this time, the locking protrusion 11 receives a force directed inward in the radial direction of the main body 1 by the inclined surface of the chamfered surface at the tip of the mounting plate 19, overcomes the biasing force of the coil spring 15, and moves inward in the radial direction. When the strap is retracted and the engagement hole 12 of the protruding piece 11 and the insertion hole 9 are aligned, the strap attachment plate 19 is pushed further downward. When the position of the strap mounting plate 19 is such that the protrusion 11 fits into the locking groove 21, the protrusion 11
moves forward in the radial direction by the biasing force of the coil spring 15, the protruding piece 11 fits into the locking groove 21, the strap mounting plate 19 is locked to the locking protruding piece 11, and the strap mounting plate 19 is engaged with the strap engaging body 8, and the strap 18 is attached to the thermos main body 1. Also, while lightly pressing the pressing part 13 of the strap engaging body 8, press the strap mounting plate 1.
9 may be inserted into the insertion hole 9.

Next, release the lock and attach the strap 18.
To remove it from the thermos body 1, use the locking protrusion 1.
1 while pressing the pressing part 13 of the strap mounting plate 1.
9 is pulled upward, the locking protrusion 11 and the locking groove 21 are unlocked, and the strap mounting plate 19 is released.
is detached from the strap engaging body 8.

With such a mounting structure, the strap mounting plate 19 and the strap engaging body 8 can be locked and released very easily, and one-touch attachment and detachment is possible. In addition, since the locking is performed reliably, the strap 18 will not come off on its own unless the pressing part 13 is pressed carelessly, and the strap 18 will not come off from the main body 1 even due to external vibrations or shocks. do not have.

Furthermore, according to the above structure, most of the mechanism for locking the strap mounting plate 19 is incorporated into the strap engaging body 8 formed by expanding a part of the protective cylinder 6 that protects the outer cylinder 2. It has an extremely compact structure.

Such a compact structure can be achieved by locking both the engagement hole 12 for inserting and locking the strap mounting plate 19 and the pressing part 13 for releasing the locking of the strap mounting plate 19. Projection piece 11
This is because the locking protrusion 11 is formed with a plurality of functions.

Moreover, a coil spring 15 is attached to the locking protrusion 11.
Since the groove 14 for accommodating the locking protrusion 1 is formed in the small cavity 10 inside the strap engaging body 8,
1 and the coil spring 15, a sufficient space can be secured to accommodate the coil spring 15, so the strap engaging body 8 can be made smaller.

Therefore, the above structure can be easily applied to parts that are required to be extremely compact, such as when forming a strap attachment/detachment mechanism on the protective cylinder 6 formed on the shoulder of a thermos flask.

Further, according to the above-described structure, the locking protrusion 1
1 and the coil spring 15 are housed in the cavity 10 of the strap engaging body 8 to complete the attachment/detachment structure of the strap mounting plate 19, which has the advantage of being easy to manufacture and extremely easy to implement.

Furthermore, since the cavity 10 is open to the inner circumferential surface of the protective cylinder 6, it is necessary to lock the protective cylinder 6 from the inside before attaching the protective cylinder 6 to the outer cylinder 2 of the thermos bottle during manufacturing. It can be easily assembled by inserting the protruding piece 11 and the coil spring 15 and later attaching the protective cylinder 6 to the outer cylinder 2.

5 to 7 show a second example of this invention, and the same components as in the first example are given the same reference numerals and their explanation will be omitted.

In this example, a thick ring-shaped protection cylinder 6 is integrally provided on the shoulder portion 5 of the main body 1, and a part of this protection cylinder 6 serves as a strap engaging body 8. A plate spring (spring member) 22 is used instead of the coil spring 15 of the first example, and a locking hole 23 passing through the strap mounting plate 19 in the thickness direction replaces the locking groove 21 of the strap mounting plate 19. is formed, and further a thin groove 24 is formed on the distal end surface of the mounting plate 19,
The difference from the first example is that the protruding strip 25 is engaged with the groove 24 by a small leaf spring 26 when locked.

In the mounting structure of this example, the locking protrusion 11 deeply enters the locking hole 23 of the strap mounting plate 19 and is locked, and the groove 24 and the protruding strip 25 on the distal end surface of the strap mounting plate 19 By engaging these, the locking becomes more reliable, and the locking will not be released even if the main body 1 shifts in the radial direction.

As explained above, the attachment structure of the strap of the thermos flask of this invention has a strap engaging body formed by bulging a part of the protective cylinder that protects the outer cylinder.
Since most of the mechanism for locking the strap is incorporated, it has an extremely compact structure.
This compact structure can be achieved by forming an engagement hole for inserting and locking the strap mounting plate and a pressing part for releasing the strap mounting plate on the locking protrusion. This is because multiple functions have been added to the locking protrusion.

Furthermore, since the locking protrusion has a groove for storing the spring member, even when the locking protrusion and the spring member are stored in a small cavity inside the strap engaging body, the spring member can be stored. Since a sufficient space can be secured for the strap engaging body, the strap engaging body can be made smaller.

Therefore, the above structure can be easily applied to parts that are required to be extremely compact, such as when forming a strap attachment/detachment mechanism on a protective cylinder formed on the shoulder of a thermos flask.

Furthermore, according to the above-mentioned structure, the attachment/detachment structure of the strap mounting plate is completed with a simple structure in which the locking protrusion and the spring member are housed in the cavity of the strap engagement body, so manufacturing is easy and extremely easy. There are features that can be implemented.

Furthermore, since the cavity is open on the inner surface of the protective cylinder, the locking protrusion and the spring member are inserted from the inside of the protective cylinder before attaching the protective cylinder to the outer cylinder of the thermos during manufacturing. However, it can be easily assembled by later attaching the protective cylinder to the outer cylinder.

Therefore, with this attachment structure, the strap can be attached and detached from the thermos bottle body very easily with one touch, and the attachment is secure and the strap will not come off inadvertently from the body. Further, since the strap engaging body can be provided within the protective cylinder of the thermos flask body, it is possible to obtain advantages such as a favorable appearance, a good appearance, and an improvement in commercial value.

[Brief explanation of drawings]

Figures 1 to 4 show a first example of this invention, with Figure 1 being a partially sectional front view, and Figure 2
The figure is an enlarged sectional view taken along the - line in Figure 1.
Fig. 3 is an enlarged view of the main part of Fig. 1, Fig. 4 is a front view of the strap engaging body in the attached state, and Figs. 5 to 7 show a second example of this invention. The figure is a partially sectional front view showing the installed state, Figure 6 is an enlarged sectional view of Figure 5, and Figure 7 is the - of Figure 5.
FIG. 3 is an enlarged cross-sectional view taken along a line. 1...Thermos bottle body, 2...Outer tube, 5...Shoulder part,
6...Protective cylinder body, 8...Strap engaging body, 9...
...Insertion hole, 10...Cavity, 11...Locking protrusion, 1
2...Engagement hole, 13...Press portion, 14...Groove, 1
5...Coil spring (spring member), 16...
Through hole, 18... Strap, 19... Strap mounting plate, 21... Locking groove, 22... Leaf spring (spring member), 23... Locking hole.

Claims (1)

[Scope of utility model registration request] A protective cylinder is attached to the shoulder of the outer cylinder of the thermos bottle body, and a part of the protective cylinder is bulged outward to form a strap engaging body. an insertion hole that is formed in the direction and opens on the upper surface of the strap engaging body; a cavity that opens at right angles to the insertion hole and opens on the inner circumferential surface of the protective cylinder body; A small-diameter through-hole is formed on one side, a protruding pressing part is formed on one side, a groove is formed on the other side, and an engaging hole perpendicular to the pressing part is formed in the center to form a locking protrusion. The locking protrusion inserts the pressing portion into the through hole of the strap engaging body, communicates the engaging hole with the insertion hole, directs the groove toward the opening side of the cavity of the strap engaging body, and inserts the pressing part into the through hole of the strap engaging body, and The strap is inserted into the cavity of the strap engaging body with a spring member interposed between the tube and the groove, and can be inserted into the insertion hole of the strap engaging body and the engagement hole of the locking protrusion, and is locked on the side. A strap mounting plate formed with a groove or a locking hole is coupled to the end of the strap, and the strap mounting plate is inserted into the strap engaging body through the insertion hole and the engagement hole, and locks the locking protrusion. A thermos flask strap mounting structure characterized in that a strap mounting plate is prevented from coming off by engaging with a groove or a locking hole.