Lighter convenient to assemble

Abstract

A lighter convenient to assemble relates to the technical field of ignition and comprises a shell, a machine core and a middle frame, the shell is provided with a containing cavity, the machine core is arranged in the containing cavity in a pluggable mode, at least one first matching portion is arranged at the bottom of the middle frame, at least one second matching portion is correspondingly arranged on the upper portion of the machine core, and the first matching portion is matched with the second matching portion. The first matching part and the second matching part are detachably and directly connected through a first buckle structure. Through the design of a plurality of buckle structures, connection can be completed only by pressing the aligned positions of the machine core and the middle frame during production, other tedious procedures are omitted, the assembly efficiency is remarkably improved, and the labor cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of ignition technology, specifically to a lighter that is easy to assemble. Background Technology

[0002] In the assembly process of existing lighters, the connection between the movement and the frame (or head frame) is mostly achieved by using pins, heat fusion, or adhesive. These connection methods have the following drawbacks: pin fixing requires additional assembly tools and steps, resulting in low production efficiency; while heat fusion or adhesive bonding results in non-removable permanent connections. Once a component inside the movement is damaged, the entire lighter becomes difficult to repair and must be scrapped, which is both environmentally unfriendly and increases the user's operating costs. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a lighter that is easy to assemble.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A lightweight lighter for easy assembly includes a housing, a mechanism, and a frame. The housing has a receiving cavity, and the mechanism is pluggably disposed within the receiving cavity. The mechanism includes a fuel tank and an electric ignition assembly disposed on the upper end of the fuel tank. A control circuit board for controlling the operation of the electric ignition assembly is disposed on the fuel tank.

[0006] The bottom of the frame is provided with at least one first mating part, and the upper part of the movement is provided with at least one second mating part. The first mating part and the second mating part are quickly connected or separated by a first snap-fit ​​structure.

[0007] The first mating part is a protrusion extending downward from the center frame, and the second mating part is a sidewall formed on the movement and located on opposite sides of the protrusion.

[0008] The first snap-fit ​​structure includes a protrusion disposed between the protrusion and the side wall and a positioning hole that engages with the protrusion.

[0009] The protrusion is provided with a first positioning block.

[0010] The protrusion has a hollowed-out portion in the middle to accommodate a driving component that is linked to the lighter cover.

[0011] The top of the protrusion or the side facing the initial assembly direction is machined with a first guide slope.

[0012] The middle frame is also provided with a third mating part, and the upper part of the movement is correspondingly provided with a fourth mating part. The third mating part and the fourth mating part are detachably and directly connected through a second snap-fit ​​structure.

[0013] The third mating part is a stepped surface formed on the middle frame, and the fourth mating part is an abutting wall formed on the movement.

[0014] A second positioning block is provided on the surface of the step.

[0015] The top inlet edge of the second mating part and / or the fourth mating part is provided with a second guide slope that is disposed opposite to each other.

[0016] The beneficial effects of this invention are as follows: Through the design of multiple snap-fit ​​structures, the connection can be completed simply by aligning the movement and the central frame and pressing them together during production, eliminating cumbersome processes such as riveting and welding, significantly improving assembly efficiency and reducing labor costs. This connection method eliminates the need for additional fasteners, simplifies the number of parts and mold structure, and helps reduce material and manufacturing costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model (when the movement and the housing are in contact).

[0018] Figure 2 This is a cross-sectional schematic diagram of the first mating part and the second mating part in Embodiment 1 of this utility model.

[0019] Figure 3 This is a cross-sectional schematic diagram of the third and fourth mating parts in Embodiment 1 of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of Embodiment 1 of this utility model (shell omitted).

[0021] Figure 5 This is a schematic diagram of the movement structure of Embodiment 1 of this utility model.

[0022] Figure 6 This is a schematic diagram of the middle frame structure of Embodiment 1 of this utility model.

[0023] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of this utility model (shell omitted).

[0024] Figure 8 This is a cross-sectional schematic diagram of Embodiment 2 of this utility model. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1 As shown, Embodiment 1 of this utility model discloses a lighter that is easy to assemble, comprising a housing 100, a movement 200, and a frame 300. The housing 100 has a receiving cavity, in which the movement 200 is pluggably disposed. The housing 100 is typically made of metal or plastic, and its interior forms a receiving cavity for accommodating the movement 200 and the frame 300. The upper end of this receiving cavity has an opening whose size matches the assembled movement 200-frame 300 module. During final assembly, workers or users can directly and conveniently insert the movement 200 and the frame 300, which are already tightly connected by snap-fits, into the receiving cavity of the housing 100 as a single unit, achieving rapid final assembly.

[0027] The middle frame 300 is typically made of metal and has a corresponding ignition port and a through hole for the ignition assembly. The upper end of the fuel tank has an ignition port and an ignition assembly located on one side of the ignition port. In this embodiment, the lighter is a kerosene (or liquid fuel) lighter, so a cotton wick is directly installed inside the ignition port. The lower part of the cotton wick extends into the fuel tank 230 of the mechanism 200, continuously and stably guiding the fuel to the ignition port through capillary action. After the two work together, the upper part of the cotton wick is exposed inside the windproof cover of the middle frame through the through hole.

[0028] Meanwhile, this embodiment employs electronic ignition, therefore the ignition component is an arc generator (or a high-voltage arc generator). The arc generator 700 is fixedly mounted on the fuel tank, with its discharge tip precisely aligned with the wick at the ignition port. The arc generator is controllably connected to a control circuit board 600 mounted on the mechanism 200 via wires, and the control circuit board 600 controls its discharge timing and energy.

[0029] To improve safety and wind resistance, an openable cover 330 is preferably installed on the central frame 300. One end of the cover 330 is hinged to the central frame 300 via a pivot structure, allowing it to rotate around the pivot for opening and closing. On the hinged side of the cover 330, a driving element 331 (usually a protrusion or lever) extends downwards from its inner side. The position of this driving element 331 is precisely designed so that when the user opens the cover 330, the driving element 331 rotates to one side with the cover, triggering a microswitch on the control circuit board 600, thereby automatically connecting the circuit and controlling the arc generator to produce an ignition arc. This mechanical linkage design achieves a smooth "open cover, ignite" operation, eliminating the need for a separate ignition button, simplifying user operation, or it can be used as a safety switch, meaning that even if the ignition is activated when the cover is closed, it will not produce a flame.

[0030] like Figure 4 As shown, the mechanism 200 is an independent, detachable functional module, with the fuel tank 230 at its core for storing liquid fuel. The control circuit board 600 and its power supply battery are preferably installed in a preset mounting position on the fuel tank 230, forming an electronic control unit.

[0031] To enable quick assembly and disassembly of the movement 200 and the frame 300.

[0032] Preferably, at least one first mating part 310 is provided on the left side of the bottom of the middle frame 300, and at least one second mating part 210 is correspondingly provided on the upper part of the movement 200. The first mating part 310 and the second mating part 210 are detachably and directly connected by a first snap-fit ​​structure 400, such as... Figure 2 As shown.

[0033] The first mating part 310 is a protrusion extending downward from the middle frame 300, such as Figure 6 As shown, the second mating part 210 is a sidewall formed on the movement 200 and located on opposite sides of the protrusion, such as... Figure 5 As shown. These two sides represent the front and back of a lighter.

[0034] During assembly, the protrusion is inserted between the two side walls. The snap-fit ​​connection is achieved through the first snap-fit ​​structure 400: a protrusion is provided on the outer side of the protrusion, and a positioning hole is provided on the inner side of the corresponding side wall of the movement 200. When the protrusion is inserted into place, the protrusion 410 snaps into the positioning hole 420, accompanied by a clear "click" feeling, completing the fixation on one side.

[0035] To further prevent over-insertion, a first positioning block 340 is also provided on the protrusion. When the movement 200 and the middle frame 300 are pulled to the final assembly position under the action of the snap-fit ​​structure, the upper surface (or top plane) of the first positioning block 340 will fully abut against the top plane or a specific step surface on the inner side of the second mating part 210 (i.e., side wall) on the movement 200.

[0036] The first positioning block 340 acts as an incompressible physical stop, precisely defining the final position of the movement 200 relative to the center frame 300 in the vertical direction (i.e., the insertion depth direction). It ensures that no matter how slight the manufacturing tolerances fluctuate, there is no loose space between the movement and the center frame on this side after assembly, avoiding any slight wobbling or "creaking" noise that may be caused by the elasticity allowance of the cantilever beam buckle.

[0037] Meanwhile, during the assembly process, when the operator presses the movement until they hear the "click" of the buckle, they can also feel by hand that the movement is "held" by the first positioning block 340 and cannot continue to move downwards. This "dual confirmation of sound and touch" provides an extremely clear signal that the assembly is complete, effectively preventing incomplete or over-assembly.

[0038] The protrusion has a hollow part 311 in the middle to make room for the drive member 331 that is connected to the cover 330 hinged to the housing. When the cover 330 is opened or closed, the drive member 331 can move in this space and control the micro switch of the circuit board.

[0039] like Figure 3 As shown, a third mating part 320 is provided on the right side of the middle frame 300, and a fourth mating part 220 is provided on the upper part of the movement 200. The third mating part 320 and the fourth mating part 220 are detachably and directly connected through a second snap-fit ​​structure 500.

[0040] In this embodiment, the third mating part 320 is a stepped surface formed on the middle frame 300, that is, in the right side region of the middle frame 300, the front and rear walls of the middle frame 300 taper inward. The fourth mating part 220 is an abutment wall formed on the movement 200. The abutment wall is located on the front and rear sides of the stepped surface. Its position is precisely designed so that when the movement 200 and the middle frame 300 are aligned, the abutment wall is located on the front and rear sides of the stepped surface. That is, the abutment wall clamps the stepped surface from the left and right directions, forming a stable surface contact and limiting position.

[0041] The third mating part 320 and the fourth mating part 220 are mechanically locked in a detachable manner by a second snap-fit ​​structure 500. In this embodiment, the second snap-fit ​​structure 500 adopts a simple and efficient design: it includes a protrusion (or snap protrusion) provided on the outer side of the step surface (i.e., the side facing the abutting wall) and a positioning hole (or snap hole) provided on the inner side of the front and rear abutting walls respectively.

[0042] A second positioning block 350 is also provided on the step surface. The second positioning block 350 is usually an upwardly protruding platform, rib or column, which makes tight contact with the inner side, top surface or specially designed receiving step of the upper end of the fourth mating part 220 (i.e. the abutting wall).

[0043] As a pre-set rigid physical stop, the second positioning block 350 precisely defines the final insertion (or pressing) depth of the movement 200 on the stepped surface side. When the snap-fit ​​structure is locked, it eliminates the axial clearance that may be caused by manufacturing tolerances of parts and elastic deformation of the snap-fit, ensuring that there is no looseness between the movement and the frame on this side of the mating surface. Thus, in conjunction with the first positioning block 340 on the other side, it jointly ensures a tight fit throughout the entire connection interface.

[0044] Echoing the function of the first positioning block, the second positioning block 350 provides the assembler with clear and definite tactile feedback on that side. When the movement is pressed into place, the operator will clearly feel the sudden change in resistance caused by the contact of the second positioning block 350. Combined with the "click" sound of the buckle engaging, this provides double confirmation, making the assembly process intuitive and with a low margin for error.

[0045] Simultaneously, each protrusion has a first guide ramp machined on its top or the side facing the initial assembly direction. When the movement 200 is pushed into the central frame 300, even with a slight initial positional deviation, the first guide ramp can contact the abutment wall or sidewall before the protrusion's cylindrical surface. Under the continued application of assembly pressure, the ramp decomposes the vertical or inclined pressure into a positive force that allows the protrusion to slide into the positioning hole, and a lateral guiding force that forces a slight elastic deformation in the abutment wall or sidewall, thereby automatically correcting the position, guiding the protrusion to slide smoothly and finally engage in the positioning hole, achieving "foolproof" blind operation.

[0046] The top entrance edges of the side walls (i.e., the second mating parts 210) located on the front and rear sides of the protrusion, and the top entrance edges of the abutment walls (i.e., the fourth mating parts 220) located on the front and rear sides of the step, are all provided with second guide slopes (or guide chamfers). These two sets of second guide slopes form a "V"-shaped or "funnel"-shaped guide channel. At the initial stage of assembly, when the operator roughly aligns and approaches the movement 200 and the middle frame 300, these large-angle slopes will make contact first. Their function is to provide coarse positioning guidance, correcting any large lateral deviations that may exist at the moment of contact, ensuring that the protrusions and step surfaces of the middle frame 300 can be smoothly "captured" and guided into the correct slot track formed by the side walls and abutment walls of the movement 200, creating the preconditions for the precise mating of the subsequent protrusions and positioning holes.

[0047] like Figure 7 and Figure 8 As shown in Embodiment 2, to achieve a reliable connection between the middle frame and the other side of the movement, the third mating part 320 can be designed as a wall-like structure 360 ​​with a guide groove. Specifically, this structure extends downward from the side of the middle frame 300 to form one or more vertical walls, and a guide groove is provided on the inner side of the vertical wall along the vertical direction or a preset assembly trajectory.

[0048] Accordingly, the fourth mating part 220 is designed as an insertion part 240 extending upward from the body of the movement 200. This insertion part can be plate-shaped, column-shaped, or a protrusion with a specific contour, and its shape forms a clearance fit or transition fit with the guide groove on the third mating part 320 to ensure that it can be accurately guided and inserted.

[0049] The core of the snap-locking mechanism lies in the presence of a slot on the side wall of the wall-like structure (third mating part 320). This slot is typically located at the end of the guide groove or at a specific position, and can be either a through hole or a recess. Simultaneously, a snap (or elastic hook) is integrally formed on the corresponding position of the side surface of the insertion part (fourth mating part 220). This snap typically has an inlet ramp and a locking plane. Furthermore, the large mating surface between the wall-like structure and the insertion part provides excellent resistance to torsion and lateral forces, making the overall structure more stable.

[0050] When the insertion part moves to the preset assembly endpoint, the guide slope of the undercut on it will contact the edge of the slot on the wall structure. Under continuous pressure, the undercut or the wall structure undergoes local elastic deformation until the undercut completely slides past the edge of the slot and quickly rebounds under its own elastic restoring force, so that its locking plane fits tightly with the locking surface of the slot, thereby completing the mechanical interlock and firmly locking the movement 200 onto the middle frame 300.

[0051] The embodiments should not be regarded as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A lighter that is easy to assemble, comprising a housing (100), a mechanism (200), and a frame (300), wherein the housing (100) has a receiving cavity, the mechanism (200) is pluggably disposed within the receiving cavity, the mechanism (200) includes a fuel tank (230) and an electric ignition assembly disposed at the upper end of the fuel tank (230), and a control circuit board (600) for controlling the operation of the electric ignition assembly is disposed on the fuel tank (230), characterized in that: The bottom of the frame (300) is provided with at least one first mating part (310), and the upper part of the movement (200) is provided with at least one second mating part (210). The first mating part (310) and the second mating part (210) are quickly connected or separated through a first snap-fit ​​structure (400).

2. The lighter that is easy to assemble according to claim 1, characterized in that: The first mating part (310) is a protrusion extending downward from the middle frame (300), and the second mating part (210) is a sidewall formed on the movement (200) and located on opposite sides of the protrusion.

3. The lighter that is easy to assemble according to claim 2, characterized in that: The first snap-fit ​​structure (400) includes a protrusion disposed between the protrusion and the side wall and a positioning hole that engages with the protrusion.

4. The lighter that is easy to assemble according to claim 3, characterized in that: The protrusion is provided with a first positioning block (340).

5. A lighter that is easy to assemble according to any one of claims 2 to 4, characterized in that: The protrusion has a hollow portion (311) in the middle for accommodating a drive component that is linked to the cover of the lighter.

6. A lighter that is easy to assemble according to claim 3 or 4, characterized in that: The top of the protrusion or the side facing the initial assembly direction is machined with a first guide slope.

7. A lighter that is easy to assemble according to claim 1, characterized in that: The middle frame (300) is also provided with a third mating part (320), and the upper part of the movement (200) is provided with a fourth mating part (220). The third mating part (320) and the fourth mating part (220) are detachably and directly connected through a second snap-fit ​​structure (500).

8. A lighter that is easy to assemble according to claim 7, characterized in that: The third mating part (320) is a stepped surface formed on the middle frame (300), and the fourth mating part (220) is an abutting wall formed on the movement (200).

9. A lighter that is easy to assemble according to claim 8, characterized in that: A second positioning block (350) is provided on the step surface.

10. A lighter that is easy to assemble according to any one of claims 7 to 9, characterized in that: The top inlet edge of the second mating part and / or the fourth mating part is provided with a second guide slope that is disposed opposite to each other.

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