Switching device and thermometer

Abstract

The embodiment of the utility model provides a switch device and a thermometer, and the switch device comprises a connecting rod which is made of a conductive material, a toggle which is connected with one end of the connecting rod, a positive terminal which is connected with the other end of the connecting rod, and a negative terminal which is adjacent to the positive terminal. When the shifting button is shifted, the connecting rod is driven by the shifting button to be in contact with the negative terminal, so that the positive terminal and the negative terminal are conducted; or is far away from the negative terminal, so that the positive terminal and the negative terminal are disconnected. Therefore, when a user uses an electronic product such as a thermometer provided with the switching device, the turning-on and turning-off functions of the thermometer can be realized by shifting the shifting button, the influence on the switching function of the thermometer due to terminal fatigue deformation caused by applying a pressing force to the switch is avoided, and the service life of the switch is further prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and in particular to a switch device and a thermometer. BACKGROUND

[0002] In the existing pen-type thermometer, in order to miniaturize the thermometer and facilitate use, a press-type button is usually used as a switch. The user presses the button to cause the positive terminal inside the thermometer to deform and contact the negative terminal, thereby realizing the function of power-on.

[0003] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely describing the technical scheme of the present application and facilitating the understanding of those skilled in the art. The above technical scheme cannot be considered as known to those skilled in the art merely because it is described in the background section of the present application. CONTENT OF THE INVENTION

[0004] The inventor found that in the existing press-type thermometer switch device, since a press-type button switch is used, after long-term use, the terminals inside the thermometer will deform due to fatigue, resulting in that the terminals cannot normally contact after being pressed, and thus the thermometer cannot be normally used.

[0005] In order to solve the above problems or other similar problems, the present application provides a switch device capable of avoiding the influence of user pressing on the switch function and a thermometer provided with the switch device.

[0006] According to a first aspect of the present application, a switch device is provided, which comprises:

[0007] a connecting rod made of a material with conductivity,

[0008] a knob connected to one end of the connecting rod,

[0009] a positive terminal connected to the other end of the connecting rod, and

[0010] a negative terminal arranged adjacent to the positive terminal.

[0011] When the knob is actuated, the connecting rod contacts the negative terminal under the action of the knob, so that the positive terminal and the negative terminal are connected; or the connecting rod moves away from the negative terminal, so that the positive terminal and the negative terminal are disconnected.

[0012] According to a second aspect of the present application, the positive terminal has a first inclination angle relative to the negative terminal, and the first inclination angle ranges from 5 to 10 degrees.

[0013] According to a third aspect of the embodiments of the present application, the knob has a knob end, a connecting end connected with the connecting rod, and a first connecting portion between the knob end and the connecting end, the first connecting portion being a flat plate structure.

[0014] According to a fourth aspect of the embodiments of the present application, a limiting portion is arranged on the first connecting portion, the limiting portion limiting the movement of the knob when the knob is moved to a fixed position.

[0015] According to a fifth aspect of the embodiments of the present application, the connecting rod has a main body portion, a second connecting portion extending from one end of the main body portion in a direction perpendicular to the extending direction of the main body portion, and an engaging portion protruding from the other end of the main body portion in a direction perpendicular to the extending direction of the main body portion; the second connecting portion is connected with the connecting end of the knob; the engaging portion engages with the positive electrode terminal and can move relative to the positive electrode terminal without being separated from the positive electrode terminal.

[0016] According to a sixth aspect of the embodiments of the present application, the negative electrode terminal has a first extending portion, a second extending portion extending from the end of the first extending portion in a direction perpendicular to the extending direction of the first extending portion, and a third extending portion extending from the end of the second extending portion in a curved arc shape in a direction parallel to the first extending portion; the positive electrode terminal has a fourth extending portion, the extending direction of the fourth extending portion being deviated from the extending direction of the first extending portion by the first inclination angle;

[0017] The fourth extending portion is provided with a first track, and the other end of the connecting rod engages with the first track and can slide in the first track.

[0018] According to a seventh aspect of the embodiments of the present application, the switch device further comprises:

[0019] a first housing accommodating the positive electrode terminal, the negative electrode terminal, the connecting rod and a part of the knob therein, having a supporting portion supporting the knob, the supporting portion having a third track penetrating through the supporting portion, and the knob being able to move in the third track.

[0020] According to an eighth aspect of the embodiments of the present application, the switch device further comprises:

[0021] a knob cover fixed to the supporting portion of the first housing, having a second track penetrating through the knob cover and a fixing portion fixed to the supporting portion of the first housing, the second track and the third track being opposite to each other, and the knob being able to move in the second track.

[0022] According to a ninth aspect of the embodiments of the present application, the inside of the knob cover is provided with a limiting groove, when the knob is pushed to a fixed position, the limiting part arranged on the knob cooperates with the limiting groove to limit the movement of the knob.

[0023] According to a tenth aspect of the embodiments of the present application, a thermometer is also provided, which has the switch device of any one of the first aspect to the ninth aspect.

[0024] One of the beneficial effects of the embodiments of the present application is that: according to the switch device and the thermometer provided with the switch device, when the user uses the thermometer, the opening and closing functions of the thermometer can be realized by pushing the knob, which avoids the terminal fatigue deformation caused by the pressing force on the switch, and further affects the switch function of the thermometer, and further prolongs the service life of the switch.

[0025] With reference to the following description and drawings, specific embodiments of the present application are disclosed in detail, which indicate the ways in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope by the embodiments described, since the embodiments are susceptible to various changes, modifications and equivalents. The embodiments of the application include combinations and sub-combinations of the elements from the different embodiments described.

[0026] Features described and / or illustrated with respect to one implementation can be used in one or more other implementations in the same or similar manner, in combination with or in place of features in other implementations, or in combination with or in place of one or more features otherwise disclosed.

[0027] It should be emphasized that the term "comprises / comprising" when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings are included to provide a further understanding of the embodiments of the present application, constitute a part of the specification and are used to illustrate the embodiments of the present application together with the text description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor based on these drawings. In the drawings:

[0029] Figure 1 is a schematic view of a thermometer switch device according to an embodiment of the present application;

[0030] Figure 2 is a schematic view of a knob of the thermometer switch device as shown in Figure 1 ;

[0031] Figure 3 is a schematic view of a knob of the thermometer switch device as shown inFigure 1 A schematic view of a connecting rod of the thermometer switch device;

[0032] Figure 4 A schematic view of a connecting rod, a knob, a positive terminal, and a negative terminal of the embodiment of the present application;

[0033] Figure 5 A schematic view of a positive terminal and a negative terminal of the embodiment of the present application;

[0034] Figure 6 A mechanical model diagram of the thermometer switch device of the embodiment of the present application;

[0035] Figure 7 A schematic view of a first housing of the thermometer switch device of the embodiment of the present application;

[0036] Figure 8 A schematic view of a knob cover of the thermometer switch device of the embodiment of the present application;

[0037] Figure 9 A schematic view of the knob of the thermometer switch device of the embodiment of the present application installed in the knob cover;

[0038] Figure 10 A schematic view of an opening process of the thermometer switch device of the embodiment of the present application;

[0039] Figure 11 A schematic view of a closing process of the thermometer switch device of the embodiment of the present application.

[0040] The reference signs are as follows:

[0041] 100: switch device, 110: connecting rod, 120: knob, 130: positive terminal, 140: negative terminal, 150 first housing, 160: knob cover

[0042] 111: main body part, 112, second connecting part, 113: engaging part, 114: protruding part

[0043] 121: knob end, 122: connecting end, 123: first connecting part, 124: limiting part H: through hole

[0044] 131: fourth extending part, 132: fifth extending part

[0045] 141: first extending part, 142: second extending part, 143: third extending part

[0046] 151: supporting part, 152: mounting hole

[0047] 161: fixing part, 162: limiting groove

[0048] R1: first track R2: second track R3: third track a: first inclination angle DETAILED DESCRIPTION

[0049] The foregoing and other features of the present application will become apparent to those skilled in the art upon consideration of the following description of specific embodiments of the application, taken in conjunction with the accompanying drawings. In the description of embodiments of the application, specific terminology is employed for the sake of clarity. However, the application is not intended to be limited to the specific terminology so selected. A person skilled in the art will recognize that the principles of the application can be employed in any device that employs a switch.

[0050] In embodiments of the present application, the term "and / or" includes any and all combinations of one or more of the associated listed terms. The terms "comprises", "comprising", "includes", "including" and the like can mean the presence of a stated feature, element, component or

[0051] In embodiments of the present application, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood by those within the art that, in this specification, the term "comprising" is not intended to exclude the presence of other elements or components in the compositions, devices, systems or methods described herein. The term "comprising" is intended to mean "including, but not limited to". Additionally, the term "consisting essentially of" is intended to mean including an integer of the recited elements or steps but excluding others not specifically recited. The term "consisting of" is intended to mean including only the recited elements or steps. It will be further understood by those within the art that the terms "comprising", "consisting essentially of" and "consisting of" do not preclude the presence or addition of other elements or components, whether or not they are specifically recited in this specification.

[0052] Embodiments of the present application will now be described, by way of example only, with reference to the accompanying drawings. The switch device of embodiments of the present application can be applied to any electronic product having a need for a press-type switch key, including but not limited to a thermometer. For the sake of convenience, embodiments of the present application will be described with reference to a thermometer.

[0053] Embodiments of the present application provide a switch device 100 for a thermometer. Figure 1 is a schematic diagram of the switch device 100 of embodiments of the present application, as shown, the switch device 100 has a connecting rod 110, a knob 120, a positive terminal 130 and a negative terminal 140. The connecting rod 110 is made of a material having electrical conductivity, the knob 120 is connected to one end of the connecting rod 110, the positive terminal 130 is connected to the other end of the connecting rod 110, and the negative terminal 140 is arranged adjacent to the positive terminal 130. Figure 1 With this structure, when the knob 120 is pressed along the first track R1, the connecting rod 110 is pushed to move along the first track R1, and the positive terminal 130 is pushed to move along the second track R2.

[0054] Figure 1 ​When the knob 120 is rotated in the direction indicated by the arrow A, the connecting rod 110 contacts the negative terminal 140 under the action of the knob 120, so that the positive terminal 130 and the negative terminal 140 are in conduction; or the connecting rod 110 moves away from the negative terminal 140, so that the positive terminal 130 and the negative terminal 140 are disconnected.

[0055] The structure of the thermometer switch device provided by the above embodiment can realize the opening and closing functions of the thermometer by rotating the knob 120 when the user uses the thermometer, avoid the terminal fatigue deformation caused by the pressing force applied to the switch, and further affect the opening and closing function of the thermometer, thereby prolonging the service life of the switch.

[0056] Figure 2 is a schematic view of the knob 120 of the thermometer switch device 100 as shown in Figure 1 As shown in Figure 2 , the knob 120 has a rotating end 121, a connecting end 122 connected with the connecting rod 110, and a first connecting part 123 between the rotating end 121 and the connecting end 122, and the first connecting part 123 is a flat plate structure.

[0057] Figure 3 is a schematic view of the connecting rod 110 of the thermometer switch device 100 as shown in Figure 1 As shown in Figure 3 , the connecting rod 110 has a main body part 111, a second connecting part 112 extending from one end of the main body part 111 in a direction perpendicular to the extension direction of the main body part 111, and a clamping part 113 protruding from the other end of the main body part 111 in a direction perpendicular to the extension direction of the main body part 111. Figure 4 is a schematic view of the connecting rod 110, the knob 120, the positive terminal 130, and the negative terminal 140 connected in the embodiment of the present application, as shown in Figure 4 The second connecting part 112 is connected with the connecting end 122 of the knob 120, and the clamping part 113 is clamped on the positive terminal 130 and can move relative to the positive terminal 130 without being separated from the positive terminal 130.

[0058] Through the structure, when the rotating end 121 of the knob 120 is rotated, the connecting rod 110 can move with the knob 120 without being separated from the positive terminal 130.

[0059] In the above embodiment, as shown in Figure 2 and Figure 4 , a through hole H is arranged on the connecting end 122 of the knob 120, and the shape and size of the second connecting part 112 are matched with the through hole H, so that the second connecting part 112 can be inserted into the through hole H to connect and fix the connecting rod 110 and the knob 120.

[0060] In the above embodiment, in some possible implementations, as shown in Figure 3 and Figure 4 , a protruding portion 114 is further arranged on the outer periphery of the second connecting portion 112, the protruding portion 114 is integrally formed with the second connecting portion 112, the outer diameter of the protruding portion 114 is slightly larger than the inner diameter of the through hole H and the outer diameter of the second connecting portion 112, and the distance between the protruding portion 114 and the main body portion 111 of the connecting rod 110 is equal to or slightly larger than the thickness of the connecting end 122 of the knob 120. After the second connecting portion 112 is inserted into the through hole H, the protruding portion 114 can limit the connecting end 122 of the knob 120 from being separated from the through hole H, so that a better fixing effect can be obtained.

[0061] In the above embodiment, as shown in Figures 2 to 4 , the cross section of the through hole H and the second connecting portion 112 is arranged in a circular shape, so that after the connecting rod 110 is connected with the knob 120, the second connecting portion 112 can rotate in the through hole H along with the movement of the knob 120 driving the connecting rod 110.

[0062] In the above embodiment, the cross section of the protruding portion 114 is arranged in a circular shape as an example, in some possible embodiments, the protruding portion 114 can also be formed as at least one protrusion arranged on the outer periphery of the second connecting portion 112, which is not limited in the present application.

[0063] Through the above structure, after the second connecting portion 112 is inserted into the through hole H, the protruding portion 114 can be clamped between the main body portion 111 of the connecting rod 110 and the second connecting portion 112, so that the fixation of the two is more reliable, and the rotation of the connecting rod 110 relative to the connecting end 122 of the knob 120 will not be affected.

[0064] Figure 5 is a schematic view of the positive electrode terminal 130 and the negative electrode terminal 140 of the embodiment of the present application, as shown in Figure 4 and Figure 5 , the negative electrode terminal 140 has a first extending portion 141, a second extending portion 142 extending from the end of the first extending portion 141 to a direction perpendicular to the extending direction of the first extending portion 141 (the up-down direction shown in Figure 5 ) and a left-right direction (the left-right direction shown in Figure 5 ), and a third extending portion 143 extending from the end of the second extending portion 142 to a curved arc shape in a direction parallel to the first extending portion 141; the positive electrode terminal 130 has a fourth extending portion 131, the extending direction of the fourth extending portion 131 deviates from the extending direction of the first extending portion 141 by a first inclination angle α, that is, the fourth extending portion 131 is slightly inclined relative to the up-down direction shown in Figure 5 .

[0065] In the above embodiment, the fourth extension 131 is provided with the first track R1, the other end of the connecting rod 110 is engaged in the first track R1 and can slide in the first track R1, specifically, as shown in Figure 4 the engaging portion 113 of the connecting rod 110 can be engaged in the first track R1 and can slide in the first track R1, thereby, when the knob 120 is pulled in the direction A shown by the arrow in Figure 4 the engaging portion 113 of the connecting rod 110 can be engaged in the first track R1 and can slide in the first track R1, thereby, when the knob 120 is pulled in the direction A shown by the arrow in

[0066] In the above embodiment, the first inclination angle a of the positive terminal 130 deviating from the negative terminal 140 is not limited, for example, it can be 5-10 degrees.

[0067] Figure 6 is a mechanical model diagram of the thermometer switch device 100 of the embodiment of the present application, as shown in Figure 6 when the positive terminal 130 deviates from the negative terminal 140 by the first inclination angle a, G represents the gravity of the connecting rod 110, f1 represents the friction of the connecting rod 110 when moving, F1 represents the force of the gravity G decomposed in the direction of the first track R1, which is also the reaction force of the connecting rod 110 moving upward, F2 represents the total reaction force of the connecting rod 110 moving upward along the first track R1, and F3 represents the pulling force that the user needs to exert on the pulling end 121 of the knob 120 when using the thermometer switch device 100 of the embodiment of the present application, according to Figure 6 the stress analysis shown in the figure, the pulling force F3 that the user needs to exert can be derived according to the following formula (1):

[0068] F3=F2 / sin a

[0069] =(F1+f1) / sin a

[0070] =(cos a*G+μ*N) / sin a

[0071] =(cos a*G+μ*sin a*G) / sin a

[0072] =(cos a*mg+μ*sin a*mg) / sin a (1)

[0073] According to formula (1), in the case that the mass m of the connecting rod 110 is ρ*V≈0.133 g, the friction coefficient μ between the connecting rod 110 and the positive terminal 130 is 0.3, the value of the gravitational acceleration g is 9.8 N / kg, and the first inclination angle α is 7.5 degrees, the user needs to exert a pulling force F3 of 10.3 N.

[0074] That is, by setting the first inclination angle α in the range of 5-10 degrees, the user can open and close the thermometer without too much force, and the state of opening and closing the thermometer is kept stable, further improving the convenience of using the thermometer switch device 100.

[0075] The first inclination angle α is exemplified above, and in some possible implementations, the fourth extension 131 of the positive terminal 130 can also not have the first inclination angle α described above, that is, the fourth extension 131 of the positive terminal 130 is set to be consistent with the extension direction of the first extension 141 of the negative terminal 140, so that the function of turning on and off the positive and negative terminals through the connecting rod 110 can still be achieved.

[0076] In the above embodiment, as shown in Figure 5 , the positive terminal 130 also has a fifth extension 132 connected with the fourth extension 131, and the extension direction of the fifth extension 132 is consistent with the extension direction of the first extension 141 of the negative terminal 140 or has a certain inclination angle, which is not limited in the present application.

[0077] In the above embodiment, as shown in Figure 1 , the thermometer switch device 100 provided by the embodiment of the present application also has a first housing 150 and a knob cover 160, wherein the positive terminal 130, the negative terminal 140, the connecting rod 110, and part of the knob 120 are accommodated in the first housing 150, Figure 7 is a schematic view of the first housing 150 of the thermometer switch device 100 of the embodiment of the present application, as shown in Figure 7 , the first housing 150 has a support portion 151 supporting the knob 120, the support portion 151 has a third track R3 penetrating through the support portion 151, and the knob 120 can move in the direction A shown by the arrow in Figure 7 in the third track R3.

[0078] Figure 8 is a schematic view of the knob cover 160 of the thermometer switch device 100 of the embodiment of the present application, as shown in Figure 1 and Figure 8As shown, the knob cover 160 is fixed to the support portion 151 of the first housing 150, and the knob cover 160 has a second track R2 penetrating the knob cover and a fixing portion 161 fixed to the support portion 151 of the first housing 150, the second track R2 and the third track R3 are opposite, and the knob 120 can move in the second track R2.

[0079] In the above embodiment, as shown, Figure 7 On the support portion 151 of the first housing 150, the third track R3 is also provided with a mounting hole 152 penetrating the support portion 151 on both sides of the sliding direction of the knob 120, when the knob cover 160 is mounted on the first housing 150, the fixing portion 161 of the knob cover 160 is engaged in the mounting hole 152, so that the knob cover 160 is mounted and fixed in the first housing 150, thereby when the knob cover 160 is fixed on the first housing 150, the second track R2 and the third track R3 can be kept in close contact for the knob 120 to slide, and the installation and use convenience of the thermometer switch device 100 is improved.

[0080] Figure 9 The knob 120 of the thermometer switch device 100 of the embodiment is mounted on the knob cover 160, as shown in Figure 2 and Figure 9 In some embodiments, a limiting portion 124 is provided on the first connecting portion 123 of the knob 120, which can limit the movement of the knob 120 when the knob 120 is actuated to the fixed position. As shown in Figure 8 and Figure 9 A limiting groove 162 is provided in the interior of the knob cover 160, as shown in Figure 9 When the knob 120 is actuated to the position where the limiting portion 124 and the limiting groove 162 contact each other, the limiting portion 124 provided on the knob 120 cooperates with the limiting groove 162 to limit the movement of the knob 120.

[0081] For example, the limiting portion 124 is made of elastic material, when the knob 120 is slid to the position where the limiting portion 124 contacts the limiting groove 162, a certain actuating force needs to be increased to make the limiting portion 124 slide to the other side of the limiting groove 162, and after the limiting portion 124 slides to the other side of the limiting groove 162, if the user does not exert the same size of reverse actuating force on the knob 120, the limiting portion 124 will be limited by the limiting groove 162 on the other side of the limiting groove 162, thereby preventing the knob 120 from sliding by itself without the control of the user.

[0082] In the above embodiment, the limiting portion 124 is arranged as a protrusion with a semicircular cross section, which extends in a direction perpendicular to the extending direction of the first connecting portion 123, and is arranged at a position close to the knob end 121, and the limiting portion 124 is arranged within the cross section range of the first connecting portion 123.

[0083] In the above embodiment, the cross section of the limiting groove 162 is also semicircular, so that the limiting portion 124 can more smoothly slide to the other side of the limiting groove 162 when in contact with the limiting groove 162.

[0084] In the embodiment of the present application, as shown in Figure 2 , two limiting portions 124 and two limiting grooves 162 are arranged as examples, and in some possible embodiments, only one limiting portion 124 and one limiting groove 162 can be arranged, which is not limited in the present application, and in the above embodiment, the two limiting portions 124 and the two limiting grooves 162 are arranged on both sides of the sliding direction of the knob 120.

[0085] In the following, the opening and closing processes of the thermometer switch device 100 of the embodiment of the present application will be described.

[0086] Figure 10 is the opening flowchart of the thermometer switch device 100 of the embodiment of the present application, as shown in Figure 10 , in the state shown in S1, Figure 10 at this time, the thermometer switch device 100 is in the initial position, when the user is ready to open the thermometer, the knob end 121 of the thermometer switch device 100 is applied with a knob force in direction A, so that the knob 120 drives the connecting rod 110 to move to the position shown in S2, at this time, the main body portion 111 of the connecting rod 110 is in contact with the third extending portion 143 of the negative electrode terminal 140, so that the positive and negative electrode terminals are in conduction, that is, the thermometer is opened. Under the action of the knob force of the user, the knob 120 continues to move in direction A, and reaches the state shown in S3, at this time, the positive and negative electrode terminals are still in the conduction state, that is, the thermometer is in the working state, and can normally perform the body temperature measurement.

[0087] Figure 11 is the closing flowchart of the thermometer switch device 100 of the embodiment of the present application, as shown in Figure 11 , when the user finishes the body temperature measurement, the thermometer is in the state shown in Figure 11When the user is ready to turn off the thermometer, a pushing force in the direction A' is applied to the pushing end 121 of the thermometer switch device, so that the knob 120 drives the connecting rod 110 to move to the position shown in S5. At this time, the main body 111 of the connecting rod 110 is in contact with the third extension 143 of the negative terminal 140, so that the positive and negative terminals are disconnected, i.e. the thermometer is turned off. Under the action of the pushing force, the knob 120 continues to move in the direction A' and reaches the state shown in S6, i.e. returns to the initial state of the thermometer.

[0088] In the above embodiment, since the third extension 143 of the negative terminal 140 has a certain bending degree, the impact force when it is in contact with the positive terminal 130 is reduced, and further the wear of the terminals is prevented, thereby prolonging the service life of the switch.

[0089] In addition, in the above embodiment, the cooperation structure of the limiting part 124 and the limiting groove 162 can also serve as a function of prompting the user that the thermometer has been turned on or turned off. For example, the contact position of the limiting part 124 and the limiting groove 162 is set at Figure 10 the position of S2 and Figure 11 the position of S5. When the user pushes the knob 120 to the positions of S2 and S5, since the pushing force needs to be increased, it can also serve as a tactile feedback of the thermometer switch device 100, thereby prompting that the positive and negative terminals are connected or disconnected at this time.

[0090] According to the thermometer switch device 100 provided by the embodiment of the present application, when the user uses the thermometer, the opening and closing functions of the thermometer can be realized by pushing the knob 120, which avoids the fatigue deformation of the terminals caused by the pressing force applied to the switch, thereby affecting the switching function of the thermometer, and further prolonging the service life of the switch.

[0091] The embodiments of the present application are described above with reference to specific side. However, it should be clear for those skilled in the art that these descriptions are exemplary and are not a limitation on the protection scope of the embodiments of the present application. Those skilled in the art can make various modifications and changes to the embodiments of the present application according to the spirit and principles of the embodiments of the present application, and these modifications and changes are also within the scope of the embodiments of the present application.

[0092] The preferred embodiments of the embodiments of the present application are described above with reference to the accompanying drawings. Many features and advantages of these embodiments are clear according to the detailed description, and therefore the appended claims are intended to cover all these features and advantages falling within the true spirit and scope of these embodiments. In addition, since many modifications and changes are easily conceived by those skilled in the art, the embodiments of the present application are not limited to the exact structure and operation exemplified and described, but can cover all suitable modifications and equivalents falling within the scope thereof.

Claims

1. A switching device, characterized by The switch device includes: a link made of a material having electrical conductivity, a knob connected to one end of the link, a positive terminal connected to the other end of the link, and a negative terminal disposed adjacent to the positive terminal; wherein, when the knob is actuated, the link contacts the negative terminal under the knob, so that the positive terminal and the negative terminal are in conduction, or moves away from the negative terminal, so that the positive terminal and the negative terminal are in disconnection.

2. The switch device according to claim 1, wherein the positive terminal has a first inclination angle with respect to the negative terminal, the first inclination angle ranging from 5 to 10 degrees.

3. The switch device according to claim 1, wherein the knob has an actuation end, a connection end connected to the link, and a first connection portion between the actuation end and the connection end, the first connection portion being a flat plate structure.

4. The switch device according to claim 3, wherein a stop portion is provided on the first connection portion, the stop portion limiting movement of the knob when the knob is actuated to a fixed position.

5. The switch device according to claim 3, wherein the link has a main portion, a second connection portion extending from one end of the main portion in a direction perpendicular to the extension direction of the main portion, and an engaging portion protruding from the other end of the main portion in a direction perpendicular to the extension direction of the main portion; the second connection portion is connected to the connection end of the knob; the engaging portion engages the positive terminal and is movable with respect to the positive terminal without being detached from the positive terminal.

6. The switch device according to claim 1, wherein the negative terminal has a first extension portion, a second extension portion extending from the end of the first extension portion in a direction perpendicular to the extension direction of the first extension portion, and a third extension portion extending from the end of the second extension portion in a curved arc shape in a direction parallel to the first extension portion; the positive terminal has a fourth extension portion, the extension direction of the fourth extension portion being deviated from the extension direction of the first extension portion by the first inclination angle; wherein a first track is provided on the fourth extension portion, the other end of the link engaging the first track and being slidable in the first track.

7. The switching device of claim 1, wherein The switch device further includes: a first housing accommodating the positive terminal, the negative terminal, the link, and a portion of the knob therein, having a support portion supporting the knob, the support portion having a third track passing through the support portion, the knob being movable in the third track.

8. The switching device of claim 7, wherein The switch device further includes; a knob cover fixed to the support portion of the first housing, having a second track passing through the knob cover and a fixing portion fixed to the support portion of the first housing, the second track and the third track being opposite to each other, the knob being movable in the second track.

9. The switch device according to claim 8, wherein The knob cover is internally provided with a limiting slot, when the knob is pushed to a fixed position, a limiting part provided on the knob cooperates with the limiting slot to limit the movement of the knob.

10. A thermometer characterized by comprising: The thermometer has the switch device of any one of claims 1 to 9.

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