JPS58208515A - Cigarette lighter - Google Patents

Abstract

PURPOSE:To obtain a cigarette lighter which is compact, inexpensive and durable, by utilizing a shape memorizing alloy metal as a thermal responsive material which functions to detect a heating condition of a heater element. CONSTITUTION:When a reverse martensite change is caused to take place by heating up of a heater element 16 and subsequently of a contacting resillent member 30, the contacting resilient member 30 shows its inherent property of resuming a memorized shape. As the contacting resilient member 30 is memorized a shape that a spring shows in a fully elongated state, that is, it stores a length of elongation which realizes a relation Wo<WL+W'1 where W'1 is a compression load, and therefore a plug section is disengaged from a retention and then pushed backwardly to a normal position. In consequence, the heater element 16 is deenergized. Under such a state, the plug section 1 is withdrawn from a socket section 21 for igniting a cigarette. In this case, a compression load of a return spring 7 is indicated as WL, and a retaining force of an earth ring 10 in engagement with a convexed portion 32 as Wo.

Description

[Detailed Description of the Invention] The present invention relates to a cigarette lighter used for automatic use, etc., and includes a plug portion having a heater element at the tip, and a heater element that is energized when the plug portion is pushed in to heat the cigarette lighter. Cigarette lighters are widely used in automobiles, and consist of a socket that holds the plug in place until the element generates heat.
It is common to have a structure in which the bimetal detects the heating state of the element, and at the same time opens the energizing circuit of the heater element while pushing the plug and returning it to the normal position.3 However, when the bimetal is heated Conventional response bodies used as response bodies have complex structures and require man-hours to assemble, which tends to increase costs, and it is relatively difficult to maintain stable operation over a long period of time due to deterioration due to repeated mechanical operations. There were problems such as difficulty.

The present invention has been made with the aim of providing a relatively inexpensive and durable cigarette lighter, with the aim of providing a relatively inexpensive and durable cigarette lighter.
Shape memory alloy is used as a heat-responsive body that produces
- With crystals as the enemy - C potatoes, shape memory alloys are heated at high temperatures! :Sit,/The current shape is memorized, and when heated above the temperature at which reverse martensitic transformation occurs, the memorized I[
It has a shape memory alloy that can be bent into shape, and has a high surface durability that appears to be caused by repeated deformation.
Since nickel-titanium alloys such as Imetal, which require a complex and delicate 7t balance, also have shape memory alloys, have excellent scratch resistance, the present invention
A cigarette lighter with a simple structure, low cost, and durability can be obtained. .

Next, one embodiment of the present invention will be described with reference to the drawings. As shown in the figure, (1) is the plug part, (2) is the cylindrical plug body, (3) is the end plate provided on one end surface of the plug body (2), and (4) is the plug part. A knob is screwed onto the end plate (3) by a knob metal (5), a plug guide (6) is slidably fitted on the outside of the plug body (2), and (7) is connected to the plug body (2). Plug guide (
The return spring (8) is a dress cap attached to the surface of the end face +bl (3) by the knob (4). (9) is a ground plate fixed to the other end face (1) of the plug body (2) by folding the peripheral edge and caulking it to the plug body (2).
0 is a ground ring formed on the periphery of the ground plate (9) by folding back, αυ is a plug insulator, (13 is a heater cup, and a flange-shaped contact ring formed by folding back the periphery of the heater cup θa). , plug insulator l1
l) and heater cup (13 is the rivet A4 that holds the center part)
1 to the ground plate (9). , 09 is an insulating plate, OQ is a heater element, and heater element Oe is a long and narrow ±-shaped heater material wound in a spiral shape. So, the outer end is now heater cup 0a
Fix it by Sugat welding, etc., and tighten the center with rivets (+41
It is housed in the heater cup: Ja by fixing it to the tip of the heater cup using a 75 shishime or the like. Plug part (1
) has the structure as described above.

(21) is the socket part, and the round socket with the bottom of
(5) is washer, (26 insulating washer, (27 company terminal screw, (28') Ii nut, socket 61
"f<Z3), screw fitting (2A), washer (25), insulating wire/ya CJj) are connected to the terminal connecting through the center (27) and Nando (a) to the L litho get body (at the bottom of the The terminal screw (29) is fixed and the terminal screw (29) is screwed together and connected to the battery (71) which also serves as a fuse. It is a contact elastic member (30M, for example, shaped like a Ninogro titanium alloy). Memory alloy or flexible carp Lbafl-Ca-)
Socket insulator (23)
The bottom of: ' fixed one end, t, heat (j, 11
Assuming that there is 1 body, 7 and 1 month, it will be full. (3])
This is a leaf spring formed by cutting and raising a part of the circumferential wall of the kl-unit body (22) with a certain width in the longitudinal direction, and the entire body is inclined inward to form the earth ring αO of the plug part (1).
, and when the plug part ( ) is further pushed in, the moderation engagement convex part ( ) that engages with the earth ring αQ
32) and shake it. Socket part (21
The structure is as described in 11, and the mounting cover (33 female screw part (33a) is screwed into the screw fitting (24) K, and the end edge (33
b) and the socket pod (22) and the folded edge (22a)
), the mounting panel (34) is fixed to the socket portion (21Th, t, mounting panel (3)).

The figure shows the state in which the plug part] 1) is inserted into the normal position. From this state, when the knob (4) is pressed, the return spring (7) is deflected, and the plug part (1) is inserted into the plug guide (6). ) except for the entire part is pushed into the socket part (21).
Soil. , the contact elastic member (■) and the contact ring a3 come into contact with each other at a stroke corresponding to the distance e between them, and the energizing circuit of the heater element αQ is turned on. 32), the two engage with a sense of moderation with a stroke corresponding to the distance 1. The compressive load of the return spring (7) at this time is Wll, and the compressive load of the contact elastic member (the compressive load after additional deformation is ■
Then, the dimensions of each part and the spring constant of the contact elastic member (field) are adjusted so that the holding force when the earth ring GO is engaged with the engagement convex portion (32) and held is Wo'~M0N. Since the plug part (1) is selected, the plug part (1) is held in the pushed-in position.

The heater element (IQ generates heat and the contact elastic member (3
0) is heated by υ1 and reaches the temperature at which reverse martensitic transformation occurs, the contact elastic member (1)) H memorized shape (
・Contact bullet Vl member trying to return to C (■゛1 shows the state in which the spring is stretched out:, Q, rusted, and at this time [i: If the compressed load east is strong, Since the length of the plug part (1) is to be memorized, it is extended so that it becomes I was laughed at by the device.

Hita Niremen 1-Q (3'\ electricity is turned off,
In this state, pull out the plug part (1) from the socket part (21V) and use it to ignite the Kamisuke. Note that the contact elastic member (30) and contact ring G3 are Even if it generates heat, the parts that come in contact with the acid fi l-((
2. Plating precious metals such as silver to ensure contact.
'1. Let's do it. , In this way, in this example, the heater element ((1(
To obtain a cigarette lighter with a simple structure by using a contact elastic member (shape memory alloy for the blade) that has the function of turning on/off the power supply to 3 and simultaneously pushing the plug part (1) back to the normal position at the same time as detecting the state of heat generation. Note that the shape memory alloy can be used not only for the contact elastic member as in this embodiment, but also for other parts to make it a thermally responsive body.

As mentioned above, the present invention uses a shape memory alloy as a thermally responsive body for detecting the heat generation state of the heater element, and it is possible to obtain a cigarette lighter with a simple structure, low cost, and excellent durability. It is possible.

[Brief explanation of the drawing]

The figure is a cross-section diagram of an embodiment of the present invention. (1) Plug part, Ge heater element,
(2+) Socket part, (30)・Contact elastic member (thermal responsive body).

Claims (2)

[Claims] (1) Push the plug part with a heater element at the tip, press the plug part at 4.74 hrs. What is claimed is: 1. A cigarette lighter comprising a socket section and a socket section, characterized in that a thermally responsive body for detecting the heat generation state of the heater element is constructed using a shape memory alloy. (2) A coil spring-like heat-responsive body made of a shape memory alloy is interposed between the plug part and the socket part. The cigarette lighter according to claim 1, which has a constant constant and has a shape that expands and pushes back the plug portion when the temperature is high.