JP2004097478A - Sealing structure for canteen with spout - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize an attachment structure which prevents a packing attached on the back side of a lid of a canteen and pressed against the end surface of a spout for sealing from falling for a long period of time without increasing components. <P>SOLUTION: An undercut part 56 is provided on an inner peripheral surface of a recessed part 55 provided on the back side of the lid 46, and a part of the packing 47 fit in the recessed part 55 engages the undercut part 56. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seal structure for a water bottle with a drinking spout. In addition, the water bottle with a drinking mouth may be called a water bottle with a straw.
[0002]
[Prior art]
2. Description of the Related Art A water bottle with a spout provided with a spout capable of appearing and retracting in a stopper with a lid has been widely used. This water bottle is generally provided with a penetrating portion in a stopper fitted to the opening of the water bottle main body, and a drinking member is inserted into the penetrating portion so as to be able to move up and down with a certain stroke, and the lower end of the drinking member is A tube is connected, and the lower end of the tube is suspended inside the water bottle body. The upper end of the coil spring fitted to the outer periphery of the spout member is supported by the spring receiving portion of the spout member, and the lower end is supported by the penetrating portion to allow the spout member to project in the protruding direction. An urging force is applied, and the spout member is immersed against the urging force by a lid attached to the stopper. When the user opens the lid, the spout member rises by a certain stroke due to the urging force of the coil spring, so the user should directly put the spout at the tip of the spout to suck and drink the beverage inside the water bottle body. Can be. A packing (seal member) is attached to the back surface of the lid, and when the lid is closed, the packing is pressed against the upper end face of the drinking spout to seal the end face and prevent water leakage. (For example, see Patent Documents 1 to 3).
[0003]
In the above seal structure, as a means for attaching the packing to the back surface of the lid, the center surface of the lid is protruded upward to form a recess on the back surface, and the packing is fitted into the recess to hide the protruding portion on the surface. For this purpose, a cover with a cover member is known (see Patent Document 1). Further, there is a known configuration in which an annular rib is provided on the back surface of a lid, and packing is fitted into a concave portion formed inside the rib (see Patent Document 2). Furthermore, there is also known one in which the packing is supported by a packing pressing member attached to the back surface of the lid (see Patent Document 3).
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 6-6739 (column 3, lines 43-49, FIG. 1)
[Patent Document 2]
Registered Utility Model No. 3060694 (reference numeral 8c in FIG. 3)
[Patent Document 3]
JP-A-2000-106947 (paragraph 0020, FIGS. 2 and 3)
[0005]
[Problems to be solved by the invention]
Since the seal structures described in Patent Literatures 1 and 2 are merely those in which a packing is fitted into a concave portion, the seal structure easily falls off during use due to a manufacturing dimensional error, deterioration of the elasticity of the packing, and the like. There's a problem.
[0006]
Further, as in Patent Literature 1, a cover having a central portion surface protruding upward to form a concave portion on the back surface thereof requires a cover member for concealing the protruding portion, thereby increasing the number of parts. . If a rib is provided on the back surface of the lid as in Patent Literature 2, a sink occurs during molding along the shape of the rib on the front surface side, and there is a problem that the appearance of the product is impaired. Further, as in Patent Document 3, there is a problem that the use of a packing holding member causes an increase in the number of parts of a product.
[0007]
Therefore, an object of the present invention is to solve the above-mentioned problem in the seal structure of the lid of a water bottle with a drinking spout, and to provide a seal structure capable of securely sealing without increasing the number of parts.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention relates to a drinking device in which a packing is fitted into a concave portion provided on the back surface of a lid, and when the lid is closed, the packing is pressed against an end surface of the drinking mouth to seal the drinking. In the seal structure for a water bottle with a mouth, an undercut portion is provided on the inner peripheral surface of the concave portion, and a part of the packing fitted into the concave portion is engaged with the undercut portion.
[0009]
According to the above configuration, since the packing is fitted into the undercut portion of the concave portion, there is no possibility that the packing will fall off even if there is a dimensional error in production, deterioration of the elasticity of the packing, or the like.
[0010]
In addition, if a small concave portion is provided on the bottom surface of the concave portion according to the shape of the end surface of the spout, even if the vertical positional relationship between the spout and the packing at the time of closure is varied, the packing is elastically deformed. Since the variation is absorbed within the range of the sum of the amount of deformation and the amount of fitting of the packing into the small recess, stable sealing can be performed.
[0011]
Further, when a flat upper end surface is formed on the surface of the lid corresponding to the concave portion, and a label is attached to the upper end surface, a die-cut hole for forming the undercut portion is hidden by the label. The appearance is not impaired. If the upper end surface is formed to be inclined forward, the label can be easily seen from the front of the water bottle.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, the water bottle with a drinking spout of the embodiment is formed by fitting and integrating a shoulder member 4 covering these portions from the shoulder portion 2 of the water bottle main body 1 formed of a vacuum double container to the opening 3. A stopper 5 is detachably screwed to the shoulder member 4. The plug 5 includes a plug ring 6 fitted on the outer peripheral portion of the shoulder member 4 and a plug 7 fitted inside the plug ring 6.
[0013]
A screw thread 8 is provided on the inner peripheral surface of the lower end portion of the plug ring 6 and is screwed with a screw thread 9 of the shoulder member 4. An opening 11 is provided at the upper end of the plug ring 6 (see FIG. 2), and a hinge receiving portion 12 is provided at a rear end of the opening 11. A circumferential rib 13 is provided on the inner peripheral surface of the opening 11, and a positioning recess 14 is provided at a lower end of the inner surface of the opening 11 below the hinge receiving portion 12. Further, a pair of radial guide walls 15, 15 are provided in the hinge receiving portion 12.
[0014]
As shown in FIGS. 1 and 2, a packing 16 is mounted on the outer peripheral surface of the lower end of the plug 7, and a deep guide concave portion 18 having an opening 17 on the upper end surface is provided. A penetrating portion 19 is provided at the lower end of the guide recess 18. Since the guide recess 18 is provided with its center line inclined forward of the plug 5, the opening 17 is inclined forward as shown in FIG. A step 21 is provided on the inner peripheral portion near the lower end through portion 19, and a portion from the step 21 to the opening 17 at the upper end has a slightly larger diameter. A pair of opposing guide notches 22, 22 are provided on the inner diameter surface of the through portion 19 (see FIG. 2). A pair of radial guide walls 23 are provided at the rear end of the opening 17. The guide walls 23, 23 abut against the guide walls 15, 15 of the plug ring 6, as described later, to form a guide portion 25 of the lock button 24. A horizontal upper end surface 26 is provided below the outer peripheral portion of the opening 17, and an intermediate step 27 is provided on the outer peripheral surface below the upper end surface 26.
[0015]
The plug 7 is inserted from below the plug ring 6, the upper end of the plug 7 is inserted into the opening 11 of the plug ring 6, and the outer peripheral surface of the upper end surface 26 is fitted to the rib 13 with some resistance. . That is, snap fitting is performed. At the same time, the intermediate step 27 is opposed to the lower end surface of the opening 11 to prevent upward escape and perform vertical positioning. The positioning projection 28 (see FIGS. 1 and 2) provided below the guide portion 25 is fitted into the positioning recess 14 of the opening 11 to position the plug 7 in the circumferential direction.
[0016]
A drinking spout member 31 is inserted into the guide recess 18 of the stopper 7 so as to be slidable in the vertical direction. The spout member 31 is formed of a pipe-shaped member, and as shown in FIG. 2, a collar 32 is provided at an intermediate portion, and a packing 34 is fitted between the collar 32 and a spring receiving portion 33 provided at a lower portion thereof. Is done. The space between the brim 32 and the upper end is the drinking spout 35. The collar 32 and the packing 34 are accommodated in the large-diameter portion of the guide concave portion 18 above the step portion 21, and the collar 32 guides the sliding of the spout member 31. The packing 34 adheres tightly to the step portion 21 to seal when the drinking member 31 is at the lower end position.
[0017]
A guide portion 38 slightly longer than the vertical movement stroke of the spout member 31 is provided below the spring receiving portion 33, and a screw portion 39 is provided below the guide portion 38, and a connection port 41 is provided below the screw portion 39. Provided. The guide section 38 is provided with a pair of opposing guide ribs 42 over its entire length. The guide ribs 42, 42 are fitted in the notches 22, 22 (see FIG. 2) provided in the penetrating portion 19 at the lower end of the guide recess 18, thereby preventing the mouth member 31 from rotating around the center line. It is planned.
[0018]
The coil spring 36 is fitted around the guide portion 38. The inner diameter of the coil spring 36 is naturally larger than the outer diameter of the guide portion 38 including the ribs 42, 42, and the coil spring 36 can freely move in the length direction of the guide portion 38. it can.
[0019]
The above-described coil spring 36 is provided with an upward biasing force on the spout member 31 by engaging a lower end portion of the coil spring 36 with the penetrating portion 19 and slides upward, but a nut as a stopper for setting an upper limit of the slide stroke. 44 is screwed into the screw portion 39. The upper end of the flexible tube 45 is inserted into the connection port 41. As shown in FIG. 1, the lower end of the tube 45 is bent in contact with the inner wall of the water bottle main body 1, and the lower end reaches the bottom surface. Thereby, the drinking spout member 31 is communicated with the inside of the water bottle main body 1.
[0020]
The lid 46, which is rotatably attached to the hinge receiving portion 12, closes the upper part of the plug 5 and simultaneously pushes the upper end surface of the drinking spout 35 with a packing 47 as a sealing member attached to the inner surface thereof, thereby causing the coil spring 36 Is pressed until the packing 34 hits the step 21, that is, to the lower limit of the sliding stroke of the spout member 31. The lock button 24 described above is inserted into the guide portion 25 to lock the lid 46 in the closed state. The lock button 24 is provided with a lock claw 48 at an upper end portion thereof and is urged outward by a coil spring. When the lock button 24 is depressed, the lock claw 48 is engaged with the engaging portion 49 of the lid 46, and locks the lid 46 in the closed state (see the state of the solid line in FIG. 1). When the lock button 24 is further pushed in, the lock is released, and the lid 46 is pushed open by the urging force of the coil spring 36 that pushes up the spout member 31 upward, and is opened (see the two-dot chain line in FIG. 1).
[0021]
As shown in FIG. 3A, the lid 46 is formed in a bowl shape, and is shaved on a surface inclined forward with an inclination angle θ with respect to a lower end edge 51 which is horizontal in an upright state of the water bottle. A drop-shaped circular upper end surface 52 is formed in the periphery thereof, slightly recessed from the bowl portion (see FIG. 8B). A hinge shaft 54 is provided on the rear end surface of the lid 46 via an arm 53 projecting in parallel with the lower edge 51. The hinge shaft 54 is fitted into the hinge receiving portion 12 of the plug ring 6, and the lid 46 is attached so as to be freely opened and closed.
[0022]
On the back surface of the lid 46, as shown in FIG. 3C, an oval concave portion 55 having a center at the center thereof is provided in the range of the upper end surface 52. Undercut portions 56, 56 having a predetermined length of width a are provided in both side arc portions on the long axis side of the inner peripheral surface of the concave portion 55. Die-cut holes 57, 57 slightly wider than the width a of each of the undercut portions 56, 56 are provided on the upper end surface 52 to enable die-cutting during molding. Further, a small concave portion 58 formed of an oblong groove that matches the end surface shape of the drinking port 35 is formed in the bottom of the concave portion 55 in a similar shape concentric with the concave portion 55.
[0023]
The packing 47 is fitted into the recess 55. The packing 47 is formed into an oval shape by an elastic member such as rubber as shown in FIG. Mating ribs 59, 59 are provided. As shown in FIG. 5, the packing 47 is fitted into the concave portion 55 of the lid 46, and the engaging ribs 59, 59 are engaged with the undercut portions 56, 56 of the concave portion 55.
[0024]
As described above, when the lid 46 is closed in a state where the packing 47 is fitted in the concave portion 55, the drinking mouth 35 is pushed down by the packing 47. At that time, the packing 47 is elastically deformed by a deformation amount due to the elasticity of the packing itself and the deformation due to the pressing by the end face of the drinking mouth 35 matching the small recess 58 as shown by a two-dot chain line in FIG. I do. The variation in the positional relationship between the lid 46 and the drinking spout 35 is absorbed by the amount of the deformation.
[0025]
The shape of the small concave portion 58 may be a planar elliptical concave portion having no central convex portion as shown in FIGS. 6A and 6B.
[0026]
As described above, when the undercut portions 56, 56 are provided, if the width a is small, the die can be forcibly punched to form without forming the punching holes 57. If a becomes larger than a certain value, a punching hole 57 is required, and the hole is exposed on the upper end surface 52, which impairs the appearance. Therefore, as shown in FIGS. 5 and 6A, a label 60 covering the entire upper surface 52 of the circular shape is attached. As described above, since the upper end surface 52 is inclined forward at a constant inclination angle θ, the label 60 attached here has an advantage that it is easier to attract customers' consciousness than when there is no inclination angle.
[0027]
【The invention's effect】
As described above, the present invention provides an undercut portion in the concave portion on the back surface of the lid and engages a part of the packing fitted in the concave portion with the undercut portion, without increasing the number of parts. It is difficult for the packing to fall off for a long time, and a stable seal can be performed.
[0028]
Further, by providing a small concave portion at the bottom of the concave portion, it is possible to absorb variation in the positional relationship between the lid and the drinking spout. Furthermore, by providing a flat upper end surface on the surface of the lid corresponding to the concave portion and attaching a label to the upper end surface, it is possible to cover and remove the die-cut hole formed on the upper end surface. By forming the end face so as to be inclined forward, an effect of making the label more conspicuous can be obtained.
[Brief description of the drawings]
1 is a cross-sectional view of the embodiment; FIG. 2 is a partially exploded perspective view of the same; FIG. 3 (a) is a cross-sectional view of the same lid; 4) (a) Top view of packing same as above (b) (a) Top view of drawing (c) (a) Side view of drawing [FIG. FIG. 6 (a) A partially omitted enlarged cross-sectional view of another example of the lid part (b) (a) A partially omitted bottom view of the figure [Description of reference numerals]
DESCRIPTION OF SYMBOLS 1 Water bottle main body 2 Shoulder 3 Opening 4 Shoulder member 5 Plug 6 Plug ring 7 Plug 8 Screw 9 Screw 11 Opening 12 Hinge receiving part 13 Rib 14 Positioning recess 15 Guide wall 16 Packing 17 Opening 18 Guide recess 19 Penetration 21 Step portion 22 Notch portion 23 Guide wall 24 Lock button 25 Guide portion 26 Upper end surface 27 Intermediate step portion 28 Positioning projection 31 Drinking member 32 Collar 33 Spring receiving portion 34 Packing 35 Drinking hole 36 Coil spring 38 Guide portion 39 Screw Portion 41 Connection port 42 Guide rib 43 Engagement groove 44 Nut 45 Tube 46 Lid 47 Packing 48 Locking claw 49 Engagement portion 51 Lower edge 52 Upper end surface 53 Arm 54 Hinge shaft 55 Depression 56 Undercut portion 57 Die-cut hole 58 Small depression 59 Engagement rib 60 label

Claims (3)

In a seal structure of a water bottle with a drinking mouth, which is configured such that a packing is fitted into a recess provided on the back surface of the lid and the packing is pressed against an end surface of the drinking mouth when the lid is closed to seal the inner periphery of the recess. A seal structure for a water bottle with a drinking port, wherein an undercut portion is provided on the surface, and a part of the packing fitted into the concave portion is engaged with the undercut portion. 2. A seal structure for a water bottle with a drinking spout according to claim 1, wherein a small recess according to the shape of the end face of the drinking spout is provided on the bottom surface of the recess. 3. The seal structure for a water bottle with a spout according to claim 1, wherein a flat upper end surface is formed on a surface of the lid corresponding to the concave portion, and a label is attached to the upper end surface.

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