CN216873062U - Outdoor power supply with cigarette lighting device - Google Patents

Abstract

The utility model discloses an outdoor power supply with a cigarette lighting device, which comprises an outdoor power supply body and the cigarette lighting device, wherein the outdoor power supply body is provided with a plug interface; the cigarette lighting device is connected with the outdoor power supply body through the plug socket detachably, the cigarette lighting device comprises a cigarette lighting seat, the cigarette lighting seat comprises a cylinder body, the cylinder body is provided with an open end for the plug-in of the cigarette lighter, and the inner wall of the cylinder body is provided with an elastic abutting part abutted against the outer wall surface of the cigarette lighter. The outdoor power supply with the cigarette lighting device is simple in structure and strong in practicability, can be effectively adapted to the existing vehicle-mounted cigarette lighter, is convenient for a user to get fire or light cigarettes, and can effectively improve the assembly efficiency.

Description

Outdoor power supply with cigarette lighting device

Technical Field

The utility model relates to the technical field of outdoor power supplies, in particular to an outdoor power supply with a cigarette lighting device.

Background

With the development of various electronic devices and electric appliances, the life of human beings is more and more convenient, but when people are outdoors, such as in camping outdoors, the power supply of the electronic devices and the electric appliances is a problem, and an outdoor power supply is designed for the people for outdoor power supply or emergency power supply.

In order to bring convenience to the electricity-taking requirement of a user, the vehicle charging output port is usually arranged on an outdoor power supply, so that the requirement of the user for charging small-sized electronic equipment outdoors is met, but the vehicle charging output port on the existing outdoor power supply cannot be effectively connected with the existing cigarette lighter when in use, and therefore a fire source cannot be provided for the user during outdoor activities.

The above is only for the purpose of assisting understanding of the technical solution of the present invention, and does not represent an admission that the above is the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an outdoor power supply with a cigarette lighting device, and aims to solve the technical problem that a vehicle charging output port on the conventional outdoor power supply cannot be effectively connected with the conventional cigarette lighter.

In order to achieve the above object, the present invention provides an outdoor power supply with a lighting device, comprising:

the outdoor power supply comprises an outdoor power supply body, wherein a socket is arranged on the outdoor power supply body;

some cigarette devices, some cigarette devices pass through interface detachably connect in on the outdoor power body, some cigarette devices include some cigarette seat, some cigarette seat includes the barrel, the barrel has the opening end that supplies the cigar lighter to peg graft, be equipped with on the barrel inner wall with the elasticity butt portion of the outer wall butt of cigar lighter.

In one embodiment, the elastic abutting portion is an elastic arm, a through groove is formed in the wall of the cylinder, and one end of the elastic arm is connected with a groove wall of the through groove, close to the open end.

In one embodiment, an abutting projection is arranged on the inner wall of the other end of the elastic arm far away from the open end.

In an embodiment, the cigarette lighter seat comprises a shell, a ceramic seat, a contact terminal and an insulating plate, the shell is concave to form the cylinder, the ceramic seat is arranged on the inner side of the bottom of the cylinder, the insulating plate is arranged on the outer side of the bottom of the cylinder relative to the ceramic seat, through holes are formed in the ceramic seat, the insulating plate and the shell along the axis direction of the cylinder, and the contact terminal is arranged in the through holes in a penetrating mode.

In one embodiment, the outer periphery of the end part of the other end of the shell, which is far away from the open end, is provided with a thread, and the bottom of the insertion port is provided with a screwing part matched with the thread.

In one embodiment, a metal elastic sheet is circumferentially arranged at one end of the ceramic seat, which is far away from the bottom of the cylinder, one end of the metal elastic sheet extends onto the through groove and can move when external force is applied to the through groove, and the other end of the metal elastic sheet is connected with the contact terminal.

In an embodiment, the metal elastic sheet and the elastic arm are oppositely arranged in the through groove along the axial direction of the shell.

In an embodiment, the cigarette lighting device further comprises a sleeve, and the sleeve is sleeved outside the shell and detachably connected with the shell.

In one embodiment, the sleeve is provided with two open ends, and one end of the sleeve is provided with a shaft shoulder matched with the thread.

In an embodiment, the shell is folded outwards at the open end to form a surrounding edge, and one end of the sleeve, which is far away from the bottom of the barrel, is spaced from the surrounding edge.

The outdoor power supply with the cigarette lighting device comprises an outdoor power supply body and a power supply device, wherein a plug-in port is arranged on the outdoor power supply body; the cigarette lighting device passes through interface detachably connect in on the outdoor power source body, the cigarette lighting device includes the cigarette lighting seat, the cigarette lighting seat includes the barrel, the barrel has the opening end that supplies the cigar lighter to peg graft, be equipped with on the barrel inner wall with the elasticity butt portion of the outer wall butt of cigar lighter. This application is through set up on the inner wall of barrel the bullet arm works as the cigar lighter will peg graft the end and insert when in the barrel, can utilize set up on the barrel inner wall elasticity butt portion with the mutual elasticity butt of butt annular on the outer wall of the outer bush of cigar lighter, it is right the outer bush of cigar lighter is fixed, so that the activity sets up interior bush in the outer bush is followed the axial and is stretched out and drawn back, with the setting adapting unit electric connection of barrel bottom, and then makes and locates the heating wire of grafting end tip can be switched on to can be with the effectual connection of car output port and current cigar lighter on the outdoor power supply, in order to make things convenient for the user to provide the ignition of some cigarettes or the source of a fire when outdoor activities.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of an outdoor power supply with a lighting device according to the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic structural view of an embodiment of the smoking device of FIG. 2;

FIG. 4 is a front view of the smoking device of FIG. 3;

FIG. 5 is a cross-sectional view of the sheet at A-A in FIG. 4;

FIG. 6 is an exploded view of the smoking device of FIG. 3;

FIG. 7 is a schematic view of the structure of the cigarette holder of FIG. 6;

FIG. 8 is a schematic view of the sleeve of FIG. 6;

fig. 9 is a schematic structural view of the cigarette lighter of fig. 6.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides an outdoor power supply with a cigarette lighting device.

In the embodiment of the present invention, as shown in fig. 1 to 7, the outdoor power supply 10 with a lighting device includes an outdoor power supply body 11 and a lighting device, wherein the outdoor power supply body 11 is provided with a socket 111; the cigarette lighting device is connected to the outdoor power supply body 11 through the interface 111 detachably, the cigarette lighting device comprises a cigarette lighting seat 12, the cigarette lighting seat 12 comprises a cylinder 121a, the cylinder 121a is provided with an open end 121b for the cigarette lighter 200 to be plugged, and the inner wall of the cylinder 121a is provided with an elastic abutting part abutted to the outer wall surface of the cigarette lighter 200.

Specifically, in the embodiment of the present invention, the outdoor power supply 10 with a lighting device includes an outdoor power supply body 11, and the outdoor power supply body 11 has a hollow structure, and has a lower casing, a front panel, a left end plate, a rear plate, a right end plate, an upper casing, a battery pack, a main circuit board, a heat dissipation plate, and the like. The inferior valve with the epitheca sets up relatively, the front bezel with the back plate sets up relatively, the left end board with the right side end board sets up relatively, and the inferior valve the front bezel the left end board the back plate the right side end board with the epitheca encloses into jointly and holds the chamber, the battery package main circuit board with the heating panel all sets up hold the intracavity.

Furthermore, a plug-in port 111 is arranged on the outdoor power supply body 11, the plug-in port 111 is electrically connected with the main circuit board, and is configured to provide power for the plug-in port 111, the plug-in can be arranged on any one surface of the lower shell, the front panel, the left end plate, the rear plate, the right end plate and the upper shell, and different power connection devices, such as USB plug-in devices and the like, can be arranged on the plug-in port 111. The shape of the socket 111 may be circular, square, prism, or irregular as required, and is not limited herein.

In the embodiment of the present invention, the outdoor power supply 10 with a lighting device further includes a lighting device, the lighting device includes a lighting seat 12, the lighting seat 12 and the insertion port 111 are configured to be mutually adaptive, that is, the cross section of the lighting seat 12 may also be circular, square, prism, or special-shaped, and the present application mainly uses the cross section of the lighting seat 12 as a circular shape to improve the compatibility of the lighting seat 12. The cigarette lighter 12 is detachably connected to the insertion port 111, so that the cigarette lighter 12 can be conveniently maintained and replaced, and can also be conveniently assembled, and the production efficiency is improved. Of course, in other embodiments, the cigarette lighter 12 may be integrally formed with the outdoor power source body 11, and is not limited herein. The cigarette lighter 12 is provided with a positive plate 127 and a negative plate 132, wherein the positive plate 127 and the negative plate 132 are connected with the main circuit board through the plug-in port 111 to provide power.

In an embodiment of the present invention, the outdoor power supply 10 with a lighting device further includes a cigarette lighter 200, the cigarette lighter 200 has a plug end 210, the plug end 210 includes an outer bushing and an inner bushing, an abutting ring groove 211 is formed on an outer peripheral wall of the outer bushing, the outer bushing is sleeved outside the inner bushing, and the inner bushing is axially retractable with respect to the outer bushing. The end face of the inner bush is provided with a heating wire 212, and one end of the outer peripheral wall of the inner bush facing the heating wire 212 is arranged in a gradually expanding shape.

Specifically, in the embodiment of the present invention, the cigarette lighter holder 12 includes a cylinder 121a, the cylinder 121a is disposed in a suitable manner with the cigarette lighter 200, the cylinder 121a has an open end 121b for the cigarette lighter 200 to be inserted, an elastic abutting member is disposed on an inner wall of the cylinder 121a and abuts against the abutting annular groove 211 on an outer wall surface of an outer bushing of the cigarette lighter 200, and the elastic abutting member is configured to fix the outer bushing of the cigarette lighter 200, so that an inner bushing slidably disposed in the outer bushing can be electrically connected to a connecting member disposed at the bottom of the cylinder 121a, and a heating wire 212 disposed on an end surface of the inner bushing can be configured to be electrically connected to achieve heating.

The outdoor power supply 10 with the cigarette lighting device comprises an outdoor power supply body 11 and a power supply device, wherein a plug-in port 111 is arranged on the outdoor power supply body 11; the cigarette lighting device is detachably connected to the outdoor power supply body 11 through the plug-in port 111, the cigarette lighting device comprises a cigarette lighting seat 12, the cigarette lighting seat 12 comprises a cylinder 121a, the cylinder 121a is provided with an open end 121b for the cigarette lighter 200 to be plugged in, and an elastic abutting portion abutted against the outer wall surface of the cigarette lighter 200 is arranged on the inner wall of the cylinder 121 a. This application is through set up on barrel 121 a's the inner wall elasticity butt portion works as cigar lighter 200 inserts grafting end 210 when in the barrel 121a, can utilize the edge barrel 121a inner wall sets up elasticity butt portion with the mutual elasticity butt of butt annular 211 on the periphery wall of cigar lighter 200's the outer liner, thereby it is right cigar lighter 200's outer liner fixes to make the activity set up interior bush in the outer liner stretches out and draws back along the axial, with the setting adapting unit electric connection of barrel 121a bottom, and then the feasible locating the heating wire 212 of grafting end 210 tip can be switched on, thereby can be with the effectual connection of car charge output port on the outdoor power supply with current cigar lighter 200, with the burning things which is somebody's turn to do and is lighted a fire when convenient for the user provides the cigarette or is angry when outdoor activities.

Referring to fig. 6 to 7, in some embodiments, the elastic abutting portion is an elastic arm 121c, a through slot 121e is disposed on the cylinder wall of the cylinder 121a, and one end of the elastic arm 121c is connected to a slot wall of the through slot 121e close to the open end 121 b. It is understood that the elastic abutment may be an elastic arm 121a, a point-like protrusion, an elastic wave, or a partial bump. When the elastic abutting portion is the elastic arm 121c, optionally, the number of the elastic arm 121c may be 1, 2, 3, 4, 5, 6, 7, 8, and the like, wherein when the number of the elastic arm 121c is 1, the elastic arm 121c may be annularly disposed along the circumferential direction of the inner wall of the cylinder 121a, and when the number of the elastic arm 121c is greater than 2, the elastic arm 121c may be uniformly disposed along the circumferential direction inside the cylinder 121a, so as to better abut against the abutting ring groove 211 of the cigarette lighter 200. When the elastic abutting parts are point-shaped bulges or local bulges, the elastic abutting parts are all sunken towards the inner side of the cylinder body 121a along the cylinder body 121a to form the local bulges or bulges. Specifically, the elastic arm 121c may be integrally formed with the cylinder wall of the cylinder 121a, or may be separately formed, and no special limitation is imposed herein. The elastic arm 121c and the cylinder wall are integrally formed, so that the service life of the elastic arm 121c can be prolonged, and the brittle fracture or the loss of elasticity of the elastic arm 121c can be reduced by reducing stress concentration. The through groove 121e is formed in the wall of the cylinder 121a, and one end of the elastic arm 121c is connected to the groove wall of the through groove 121e near the open end 121b, so that the moving space of the elastic arm 121c can be increased, and meanwhile, when the plug end 210 of the cigarette lighter 200 is inserted into the cylinder 121a, the elastic arm 121c slides more smoothly on the outer circumferential wall of the outer bushing, so that the mutual friction between the elastic arm 121c and the outer circumferential wall of the outer bushing is reduced, and the service life is prolonged.

Specifically, in some embodiments, in order to improve the connection stability of the elastic arm 121c and the cigarette lighter 200, an abutting protrusion 121d is disposed on an inner wall of the other end of the elastic arm 121c away from the open end 121 b. After the cigarette lighter 200 is stably inserted into the cigarette lighter seat 12, the abutting protrusion 121d abuts against the abutting annular groove 211 of the cigarette lighter 200, so that the connection stability between the cigarette lighter 200 and the cigarette lighter seat 12 is improved. The two ends of the abutting protrusion 121d in the axial direction are provided with transition surfaces to be connected with the inner wall surface of the elastic arm 121c, so that the connection transition between the grounding protrusion and the abutting ring groove 211 is smoother when the inserting end 210 of the cigarette lighter 200 is inserted or pulled out, and the user experience is improved.

Referring to fig. 4 to 7, in some embodiments, the cigarette lighter holder 12 includes a housing, a ceramic holder 122, a contact terminal 123, and an insulating plate 124, the housing is recessed to form the cylinder 121a, the ceramic holder 122 is disposed on an inner side of a bottom of the cylinder 121a, the insulating plate 124 is disposed on an outer side of the bottom of the cylinder 121a relative to the ceramic holder 122, the insulating plate 124, and the housing are provided with a through hole 125 along an axial direction of the cylinder 121a, and the contact terminal 123 is inserted into the through hole 125. In this application the inside of shell 121 is hollow structure, and one end opening, inside barrel 121a that is formed with, barrel 121 a's bottom is used for setting up installation space, ceramic holder 122 with barrel 121 a's cross sectional shape suits the setting, pastes along axial one end and locates barrel 121a bottom, insulation board 124 is roughly circular set up in the outside of axial barrel 121a is followed to the casing, ceramic holder 122, insulation board 124 and casing are followed be equipped with through-hole 125 on barrel 121 a's the axis direction, contact terminal 123 locates in the through-hole 125, contact terminal 123 is located one in the casing tip outside is served and is equipped with positive plate 127, insulation board 124 locates positive plate 127 with between the casing, in order to prevent positive plate 127 with casing electric connection plays isolated effect. The other end of the ceramic socket 122 protrudes from the end surface of the other end of the ceramic socket 122 away from the bottom of the cylinder 121a, so that when the inner bushing of the cigarette lighter 200 extends to the bottom end of the cylinder 121a, the contact terminal 123 can conduct the heating wire 212 disposed on the end surface of the inner bushing.

Specifically, referring to fig. 7, in some embodiments, a thread 121f is disposed on an outer peripheral side of an end portion of the other end of the housing away from the open end 121b, and a screwing portion engaged with the thread 121f is disposed at a bottom of the socket 111. In order to facilitate the connection between the cigarette lighter 12 and the outdoor battery body, the casing is further provided with a thread 121f on the outer peripheral side of the other end away from the open end 121b, and the cigarette lighter 12 is screwed into the insertion port 111 by the cooperation of the thread 121f and the screwing part at the bottom of the insertion port 111, so that the cigarette lighter 12 can be effectively fixed on the outdoor power supply body 11 and can be conveniently disassembled, assembled and replaced.

Referring to fig. 6 and 7, in some embodiments, a metal elastic sheet 126 is circumferentially disposed on one end of the ceramic seat 122 away from the bottom of the cylinder 121a, one end of the metal elastic sheet 126 extends onto the through groove 121e and can move when an external force is applied to the through groove 121e, and the other end of the metal elastic sheet 126 is connected to the contact terminal 123. Optionally, the number of the metal elastic pieces 126 may be 2, 3, 4, 5, and 6, and the metal elastic pieces 126 may be arranged along the axis of the cylinder 121a as required, the metal elastic pieces 126 are set as 2 in the present application, the metal elastic pieces 126 are connected to the negative electrode of the outdoor power supply, and the metal elastic pieces 126 may be connected to the negative electrode of the outdoor power supply body 11 through the housing. When the plugging end 210 of the cigar lighter 200 is inserted into the barrel 121a, the outer bushing abuts against the elastic arm 121c to fix the cigar lighter 200, the inner bushing is clamped with the metal spring 126, so that the cigar lighter 200 is electrically connected to the cigar lighter base 12, after the heating wire 212 is heated to a predetermined temperature, the metal spring 126 expands due to heating, so that the clamping force between the metal spring 126 and the inner bushing gradually decreases, and the expansion mechanism located in the inner bushing can separate the inner bushing from the metal spring 126 by using the expansion force, so that the electrical connection between the cigar lighter 200 and the cigar lighter base 12 is disconnected.

Referring to fig. 7, in some embodiments, the metal elastic piece 126 and the elastic arm 121c are disposed opposite to each other in the through slot 121e along the axial direction of the housing. In order to reduce the number of the through grooves 121e, the structural strength of the housing is improved, and therefore the elastic arm 121c and the metal elastic sheet 126 are arranged in the through groove 121e relatively along the axial direction of the housing. Of course, in other embodiments, the metal elastic piece 126 and the elastic arm 121c may be respectively disposed in different through slots 121e, and the number of the through slots 121e may be set according to the number of the elastic arms 121c and the metal elastic piece 126, which is not limited herein.

Referring to fig. 4 to 5, in some embodiments, the cigarette lighting device further includes a sleeve 13, and the sleeve 13 is sleeved outside the housing and detachably connected to the housing. It will be appreciated that the sleeve 13 is provided for facilitating the fixing of the connection between the lighter holder 12 and the outdoor power supply body 11, while improving the compatibility between the lighter devices, the sleeve 13 being detachably connected to the housing. The sleeve 13 may be fixedly connected with the socket 111 by interference or adhesion. The sleeve 13 also serves to provide a stable support for the lighter holder 12. The outer wall of the sleeve 13 on the side close to the bottom end of the cylinder 121a is provided with a negative plate 132, the negative plate 132 is connected with the cylinder wall of the sleeve 13, and the end of the sleeve 13 is connected with the end of the shell, so that the metal elastic sheet 126 is connected with the negative electrode of the outdoor power supply body 11.

Referring to fig. 8, in some embodiments, the sleeve 13 is open at both ends, and a shoulder 131 is provided at one end to engage with the thread 121 f. It is understood that, in order to match the positive plate 127 on the bottom end of the cylinder 121a of the cigarette lighter 12 to electrically connect with the outdoor power source body 11, the sleeve 13 is provided with two open ends, and the connection between the sleeve 13 and the cigarette lighter 12 is fixed in order to match the thread 121 f. In this application sleeve 13 is being close to the one end of the screw thread 121f of casing has still set up shaft shoulder 131, shaft shoulder 131 orientation the axle center shrink, can with screw thread 121f cooperation precession screw-out to it is convenient to say sleeve 13 with the connection of cigarette lighter 12 is fixed.

Referring to fig. 4-7, in some embodiments, the housing is folded over at the open end 121b to form a skirt 121g, and an end of the sleeve 13 away from the bottom of the barrel 121a is spaced from the skirt 121 g. Therefore, the cigarette lighting seat 12 can be conveniently detached by a user, so that the cigarette lighting device is more humanized.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. An outdoor power supply having a lighter device, comprising:

the outdoor power supply comprises an outdoor power supply body, wherein a socket is arranged on the outdoor power supply body;

some cigarette devices, some cigarette devices pass through interface detachably connect in on the outdoor power body, some cigarette devices include some cigarette seat, some cigarette seat includes the barrel, the barrel has the opening end that supplies the cigar lighter to peg graft, be equipped with on the barrel inner wall with the elasticity butt portion of cigar lighter outer wall butt.

2. An outdoor power supply with a lighter according to claim 1, wherein the elastic abutting part is a spring arm, a through slot is arranged on the wall of the cylinder body, and one end of the spring arm is connected with the slot wall of the through slot near the open end.

3. An outdoor power supply with a lighting device according to claim 2, wherein said elastic arm is provided with an abutting projection on an inner wall of the other end thereof away from said open end.

4. The outdoor power supply with a cigarette lighting device according to claim 3, wherein the cigarette lighting base comprises a casing, a ceramic base, a contact terminal and an insulating plate, the casing is concave to form the cylinder, the ceramic base is arranged on the inner side of the bottom of the cylinder, the insulating plate is arranged on the outer side of the bottom of the cylinder relative to the ceramic base, the insulating plate and the casing are provided with through holes along the axial direction of the cylinder, and the contact terminal is arranged in the through holes in a penetrating manner.

5. An outdoor power supply with a lighting device as claimed in claim 4, wherein the casing is provided with a screw thread on the outer periphery of the end portion of the other end away from the open end, and the bottom of the socket is provided with a screwing portion matched with the screw thread.

6. An outdoor power supply with a cigarette lighting device as claimed in claim 5, wherein the end of the ceramic base away from the bottom of the cylinder is circumferentially provided with a metal spring, one end of the metal spring extends to the through groove and can move when external force is applied to the through groove, and the other end of the metal spring is connected with the contact terminal.

7. An outdoor power supply with a lighting device as claimed in claim 6, wherein said metal elastic sheet and said elastic arm are disposed opposite to each other in said through slot along the axial direction of said casing.

8. The outdoor power supply with a lighter according to claim 5, wherein the lighter further comprises a sleeve, the sleeve is sleeved outside the casing and is detachably connected with the casing.

9. An outdoor power supply with a lighter according to claim 8, wherein the sleeve is open at both ends and has a shoulder at one end for engaging with the screw thread.

10. An outdoor power supply having a lighter according to claim 9, wherein the casing is folded over at the open end to form a skirt, the end of the sleeve remote from the base of the canister being spaced from the skirt.

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