TWM547746U - Improved knob switch structure - Google Patents

Description

Structural improvement of the rotary switch

The creation system provides a structural improvement of a rotary switch, especially a rotary switch with a convenient rotary control and a waterproof function, and a waterproof gasket is arranged inside the insulating casing for the integrally formed operating rod to pass through the waterproof gasket to expose the insulating outer casing. Externally, it achieves the purpose of increasing the swirling touch and good waterproof performance.

According to the continuous advancement of the technology era, the development of many electronic and electrical products has brought many conveniences in daily life and work. In recent years, with the rapid development of the Internet, in addition to desktop computers. In addition, portable electronic products such as notebook computers, tablet computers, smart phones, various digital assistants and digital cameras also provide easy access to electronic products at any time and any place, and therefore portable electronic devices. The products are designed to be easy to carry and use, and are designed to be light, thin, short and small. The various related components used in electronic products also need to be light, thin, short and small in design mode to conform to the electronic Product design concept.

Among the various components used in portable electronic products, the types of switches are also quite diverse. Generally, the push-type touch switch is electrically connected to the switch terminals by pressing the button to make electrical contact with the switch terminals. Signal, but the push-type touch switch can only perform the opening or closing operation, and can not perform the rotation adjustment operation; and the multi-directional touch switch through the base A plurality of contact terminals are disposed in the groove, and a plurality of elastic pieces and a control panel are stacked on the base, and a cover is covered on the control panel for the control panel to expose the outside of the upper cover for the user to press the pressing angle in different directions on the control panel, The elastic pieces under the control panel are concavely deformed and electrically contacted with the opposite contact terminals for transmitting the pressing signal; however, when the user presses, the user must press the different groove positions on the control panel, Different pressing forces are applied at different angles to press the elastic pieces under the control panel, and the elastic pieces are easily unable to recover due to repeated force pressing, or cause uneven displacement caused by uneven force at various positions of the elastic pieces, affecting and The electrical contact between the contact terminals is not reliable, and when the elastic pieces are pressed by the urging force of the control panel, displacement is formed to slide into the groove of the base, which will affect the electrical contact of the multi-directional touch switch, resulting in instability. The signal output is wrong, which leads to a decrease in reliability. That is, there are still many defects to be improved in actual application operation.

Therefore, how to solve the problems and problems of the unstable switching operation of the current electronic products, and the troubles and inconveniences that affect the unstable electrical contact of the switch and the error of the transmission signal, that is, the relevant manufacturers engaged in this industry I want to study the direction of improvement.

Therefore, in view of the above-mentioned problems and deficiencies, the creators have collected relevant information, evaluated and considered through various parties, and have accumulated many years of experience in this industry. Through continuous trial and modification, they have designed a convenient and accurate card. A new patent for the improvement of the structure of the rotary switch for positioning electrical contact and indeed transmitting electronic signals was born.

The main purpose of the present invention is that the insulating cover of the knob switch has a plurality of isolation protrusions and an upper cover cover at the top receiving groove of the base, and the section operation groove and the waterproof washer are sequentially arranged in the accommodation space at the bottom of the cover body. The storage slot and the shaft hole are disposed in the receiving groove of the base The plurality of terminals of the terminal group and the elastic arms of each terminal are staggered between the isolation protrusions, and the other side of the welding section passes through the bottom surface of the base, and the circuit turntable and the operation knob of the rotary knob are assembled in the accommodation space of the cover body, and the operation is performed. The outer side of the base portion of the knob is separated from the extended elastic arm by a predetermined distance, so that the base portion and the two extended elastic arms are located in the section operation groove of the upper cover, and the operation rod connected to the base portion passes through the waterproof gasket of the storage groove, The outside of the shaft hole is exposed, and the knob switch has a good waterproof function.

The secondary purpose of the present invention is that at least one step of the engagement section is provided around the base of the insulative housing, and a fitting section of at least one step is provided around the recessed accommodation space at the bottom of the cover for the cover. The mating section of the body is embedded in the engaging section of the periphery of the base and forms a horizontal lateral limit stop, which prevents the cover body from being laterally displaced above the base.

Another purpose of the present invention is that the rotary button is provided with a plurality of electrical contacts on the bottom surface of the circuit turntable to elastically contact or separate from the contact portions of the terminals to achieve electrical conduction or disconnection, and the top surface of the circuit turntable is provided. The connecting portion is connected to the bottom surface of the base of the operating rod, and the connecting portion is provided with at least two sets of latching grooves and protrusions which are mutually engaged with each other on the top surface of the circuit turntable and the bottom surface of the base.

A further object of the present invention is that the operating knob of the rotary button is integrally formed by the insert molding in the in-mold injection molding, and the two extending elastic arms are spaced apart from the outer side by a predetermined interval, and are extended by two. The elastic arm is provided with a resilient arm segment, wherein each elastic arm segment is continuously turned along the outer side of the base portion to a distance greater than or equal to the width of the base portion by 1/2, and then a locking portion is respectively disposed on the suspended side of the two elastic arm segments, and The locking portion forms an elastic expansion and contraction distance between the inner side and the base portion that is greater than or equal to a predetermined interval; and the predetermined spacing formed by the two opposite elastic arms and the outer side of the base portion is 0.5 mm to 2.0. Mm, preferably a predetermined pitch of 1.38 mm.

1‧‧‧Insulated housing

11‧‧‧Base

110‧‧‧ accommodating slots

111‧‧‧Isolation convex

112‧‧‧ engaging section

12‧‧‧ Cover

120‧‧‧ accommodating space

121‧‧‧Merge segment

122‧‧‧section operation slot

1220‧‧‧ card slot

1221‧‧‧Limited convex body

123‧‧‧ Storage trough

1231‧‧‧Waterproof gasket

1232‧‧‧ slotting

124‧‧‧Axis hole

2‧‧‧Terminal group

21‧‧‧ terminals

211‧‧‧Bounce arm

212‧‧‧Resistance

213‧‧‧welding section

3‧‧‧ Rotary button

31‧‧‧Circuit turntable

311‧‧‧Electrical contacts

32‧‧‧Operation knob

321‧‧‧ base

3211‧‧‧Extended elastic arm

3212‧‧‧Connecting section

3213‧‧‧Flexible arm section

3214‧‧‧Card Department

3215‧‧‧Limited slot

3216‧‧‧Limited card slot

322‧‧‧Operator

3221‧‧‧Axis

3222‧‧‧ grip

3223‧‧‧Drive Department

323‧‧‧Rotary lever

3231‧‧‧ buckle

3232‧‧‧Limited rod

33‧‧‧Connecting Department

330‧‧‧Positioning holes

331‧‧‧Bump

4‧‧‧Hand tools

The first picture is a three-dimensional appearance of the creation.

The second picture is a three-dimensional exploded view of the creation.

The third figure is a three-dimensional exploded view of another perspective of the creation.

The fourth figure is a side cross-sectional view of the creation.

The fifth figure is a top plan view of the creation operation knob.

Figure 6 is a perspective exploded view of the preferred embodiment of the present invention.

Figure 7 is a side cross-sectional view of the preferred embodiment of the present invention.

The eighth figure is a side cross-sectional view of the other direction of the creation.

The ninth figure is a partial enlarged view of the part of the eighth figure of the creation.

The tenth figure is an exploded perspective view of another embodiment of the present creation.

In order to achieve the above objectives and effects, the technical means used in the creation, its construction, the method of implementation, etc., are described in detail in the preferred embodiment of the present invention, and the features and functions are as follows.

Please refer to the first, second, third and fourth figures, which are respectively the three-dimensional appearance drawing, the three-dimensional exploded view, the three-dimensional exploded view of another perspective, and the side-viewing sectional view, which can be clearly seen from the figure. The structure of the present knob switch is improved, including an insulating housing 1, a terminal set 2 and a rotary knob 3, wherein the insulating housing 1 includes a base 11 and a cover covering the base 11. 12, the top surface of the base 11 is recessed with a receiving groove 110, and a plurality of isolation protrusions 111 are protruded in the receiving groove 110, and a frame-shaped engaging portion 112 is arranged around the base 11, and the engaging portion is The 112 is formed into a class of at least one step, and the cover 12 covered by the base 11 is recessed with the accommodating space 120 at the bottom, that is, a fitting section of the bottom of the accommodating space 120 is provided. 121, and the fitting section 121 is also in the form of a class of at least one step, and the inside of the accommodating space 120 is sequentially provided with a section operation groove 122, a receiving groove 123 and a shaft hole 124, and the section operation groove 122 is surrounded by The plurality of locking grooves 1220 and the limiting protrusions 1221 adjacent to the toothed concave and convex portions are provided, and the receiving groove 123 located inside the segment operating groove 122 receives the waterproof gasket 1231, and is disposed inside the receiving groove 123, that is, the shaft hole 124 is provided. The shaft hole 124 is penetrated to the outside of the top surface of the cover body 12.

The terminal group 2 includes a plurality of terminals 21, and each of the terminals 21 is respectively provided with an elastic arm 211 extending obliquely upwardly. Each of the elastic arms 211 is respectively provided with an arc-engaging section 212 on the floating side, and each of the opposing sections 212 The elastic arm 211 is bent on the other side and extends in the vertical direction to have a welded section 213.

The rotary knob 3 includes a circuit turntable 31, an operation knob 32 coupled to the circuit turntable 31, and a connecting portion 33 on the opposite surface of the circuit turntable 31 and the operation knob 32. The connecting portion 33 is connected to the circuit turntable 31 and the operation knob 32. The opposite surfaces are respectively provided with at least two sets of opposite positioning holes 330 and protrusions 331 for positioning the positioning holes 330 and the protrusions 331 relative to each other, and the bottom surface of the circuit turntable 31 is provided with a plurality of electrical contacts 311, and the top surface is The base portion 321 of the operation knob 32 is assembled, and the base portion 321 is integrally formed by the in-mold injection molding (Insert Molding) two oppositely extending elastic arms 3211. The two extending elastic arms 3211 have an engaging portion 3212 exposed outside the side of the base portion 321 . The two extending elastic arms 3211 are respectively provided with elastic arm segments 3213 extending to the outer side of the base portion 321 , and the arcing ridges of the locking portions 3214 are respectively disposed on the hanging sides of the two elastic arm segments 3213 , and the base portions 321 are connected The operating lever 322 includes a shaft portion 3221 coupled to the base portion 321 and a grip portion 3222 coupled to the shaft portion 3221, and the grip portion 3222 is provided with a plurality of ribs and channels having a slip preventing effect. .

When the components are assembled, the plurality of terminals 21 of the terminal group 2 are disposed on the receiving groove 110 of the base 11 of the insulative housing 1, and the elastic arms 211 of the terminals 21 are respectively extended and staggered to the receiving slots. The contact protrusions 212 between the isolation protrusions 111 and the suspension side of each of the elastic arms 211 are respectively adjacent to each other and exposed above the isolation protrusions 111, and are assembled on the receiving groove 110 of the base 11 and above the terminals 21. The circuit turntable 31 of the rotary knob 3 is provided for the terminals 21 and the circuit turntable 31 to be located in the accommodating space 120 of the cover body 12, and the electrical contacts 311 of the bottom surface of the circuit turntable 31 can be in contact with the contact portion 212 of each terminal 21. After the contact or separation is performed, the base portion 321 of the operation knob 32 on the circuit turntable 31 is inserted into the segment operation groove 122 of the cover body 12, and the extended elastic arms 3211 on the outer sides of the base portion 321 respectively utilize the two floating side clamping portions 3214. When the alignment card is held in each of the locking grooves 1220 of the segment operating slot 122, the shaft portion 3221 of the operating rod 322 located on the base portion 321 penetrates the waterproof gasket 1231 at the receiving groove 123 and is supplied to the shaft portion 3221. The grip portion 3222 is exposed through the shaft hole 124 to expose the outer surface of the top surface of the cover body 12, and is insulated by The shell 1, the terminal set 2 and the rotary knob 3 group constitute the knob switch of the present creation.

The insulative housing 1 is attached to the engaging portion 112 at the periphery of the base 11 and the fitting portion 121 at the bottom of the receiving space 120 of the cover 12 to form a stepped shape of at least one stage difference. Covered on the base 11 without lateral displacement The shape of the cover 12 and the base 11 form a stable assembly.

Moreover, the rotating button 3 is integrally formed with the opposite extending elastic arms 3211 at the base portion 321 of the operating knob 32, and the two extending elastic arms 3211 are exposed outside the base portion 321 by the one side engaging portion 3212, and are preset with the metal strip. (not shown in the figure) is connected. After the two extended elastic arms 3211 are integrally formed with the base portion 321 , the second elastic arm 3211 is connected to the preset metal strip by the cutting portion 32 at the engaging portion 3212, and the two extending elastic arms 3211 are extended. The elastic arm segments 3213 extend continuously to the opposite sides of the base portion 321 respectively, and the extending lengths of the elastic arm segments 3213 are greater than or equal to the width 1/2 of the base portion 321 , and the two extending elastic arms 3211 are opposite to the base portion 321 . A predetermined spacing (F) is formed between the outer sides (W1) (please refer to FIG. 5 at the same time), and the two extending elastic arms 3211 are elastically stretched and displaced on the opposite sides of the base portion 321 , and the elastic arms of the two extending elastic arms 3211 are respectively In the segment 3213, the locking portions 3214 respectively provided on the floating side, the locking portions 3214 form an elastic expansion and contraction distance between the inner side and the base portion 321 which is greater than or equal to a predetermined interval (F).

Please refer to the second, third, fourth, fifth, sixth and seventh figures, which are respectively an exploded perspective view of the creation, an exploded perspective view of another perspective, a side cross-sectional view, a top plan view of the operation knob, and a preferred implementation. 3 is an exploded perspective view of a preferred embodiment, and it can be clearly seen from the figure. The operation knob 32 of the rotary knob 3 is disposed on the opposite side (W1) of the base portion 321 and is integrally formed. Relatively extending the elastic arm 3211, the distance (L) between the other two opposite outer sides (W2) to the center of the base portion 321 may be 2.8 mm to 3.5 mm, and the preferred distance (L) may be 3.21 mm, and the base portion 321 is opposite to the base portion 321 The extension length (L1) of the outer elastic arm segment 3213 may be greater than or equal to the base portion 321 The width (2L) of 1/2 or other lengths, etc.; and the predetermined spacing (F) formed between the two extending elastic arms 3211 and the opposite outer side (W1) of the base portion 321 may be 0.5 mm to 2.0 mm, and preferably The predetermined pitch (F) is 1.38 mm.

Furthermore, the base portion 321 of the operation knob 32 and the operating rod 322 are also integrally formed, which can increase the accuracy of the rotation of the base portion 321 by the operating rod 322, and the missing or loose separation of the operating rod 322 and the base portion 321 can be prevented. The operating rod 322 drives the base portion 321 and the circuit turntable 31 to rotate, so that the electrical contacts 311 on the bottom surface of the circuit turntable 31 respectively form stable electrical contact with the terminals 21 of the terminal group 2, and transmit electronic signals (only in the figure) The position of the electrical contact 311 of the preferred embodiment is illustrated, and the number and position of the electrical contacts 311 must be changed depending on the design when the actual application is implemented.

Furthermore, the operation knob 32 of the rotary knob 3 is provided on the top of the grip portion 3222 of the operation lever 322, and the driving portion 3223 is provided for the preset hand tool to cooperate with the driving portion 3223 to operate the operation knob 32 to rotate. The portion 3223 can be a flat-shaped groove, a cross-shaped groove, a polygonal groove (such as a quadrangular, a hexagonal or an octagonal groove) or a polygonal rod, which is used for the preset hand tool 4 to cooperate with the The hand tool 4 can be a flat-shaped screwdriver, a cross-shaped screwdriver, a polygonal wrench (such as an hex wrench or a ratchet wrench) or a wrench, an open-end wrench or a spanner wrench, and various driving parts 3223 that can be matched with a preset hand tool. .

Please refer to the eighth and ninth figures, which are respectively a side cross-sectional view of the other direction of the creation and a partial enlarged view of the part of the eighth figure a. It can be clearly seen from the figure that the insulating casing 1 of the present invention is The cover body 12 is disposed on the side wall surface of the inner storage groove 123, and is provided with at least one inverted L-shaped slit 1232 extending through the shaft hole 124 for the electric power of the circuit turntable 31. The frictional heat generated by the contact between the contact 311 and the contact 212 of each terminal 21 is transmitted to the shaft hole 124 through the slot 1232 and then discharged to the outside of the cover 12 through the shaft hole 124. The temperature inside the cover space 12, the segment operation groove 122, and the storage groove 123 of the cover 12 can be reduced, so that the heat temperature can be prevented from being accumulated inside the cover body 12, and the auxiliary knob switch can achieve a good heat dissipation function.

Please refer to the second, third and tenth figures, which are respectively an exploded perspective view of the creation, an exploded perspective view of another perspective, and an exploded perspective view of another embodiment, which can be clearly seen from the figure. The created rotary button 3 is attached to the base portion 321 of the top surface of the circuit turntable 31. The base portion 321 can be provided with two opposite limiting recesses 3215 and two adjacent limiting recesses 3215 on the top surface. The limiting card slot 3216 can assemble the rotating rod 323 at the second limiting slot 3215 and the limiting slot 3216 of the base portion 321 . The rotating rod 323 is convexly provided with two opposite buckles 3231 and two adjacent buckles. A limiting rod 3232 is protruded from the side of the 3231, and can be respectively inserted into the top surface of the base portion 321 by the two buckles 3231, and then inserted into the limiting card slot 3216 by the limiting rod 3232. The rotating rod 323 is coupled to the base portion 321 to rotate the driving base 321 and the circuit turntable 31 by the rotating rod 323, so as to drive the electrical contacts 311 on the bottom surface of the circuit turntable 31 of the rotating button 3 and the respective terminal groups 2, respectively. The terminal 21 forms a stable electrical contact and transmits an electronic signal (only the preferred embodiment is illustrated in the drawings) 311 of the contact position must be changed depending on the design, location and number of the electrical contacts 311) the actual application implemented.

Therefore, the above description is only a preferred embodiment of the present invention, and thus the scope of the present invention is not limited thereby, and the structure of the creation knob switch is improved, and is placed on the base 11 of the insulative housing 1 at the receiving groove 110 for Set the plurality of terminals 21 of the terminal group 2 for each terminal 21, the interference section 212 is exposed above the plurality of isolation protrusions 111, and the rotary knob 3 and the cover body 12 are disposed on the base 11 and the terminal group 2, and the circuit turntable 31 of the rotary knob 3 is assembled on each terminal 21, and The base portion 321 of the operation knob 32 is assembled on the circuit turntable 31 for the terminal group 2 and the circuit turntable 31 to be located in the bottom receiving space 120 of the cover body 12. The operating rod 322 is disposed above the base portion 321 , that is, the cover portion 3221 is inserted into the cover portion. The waterproof gasket 1231 of the receiving groove 123 of the body 12, the holding rod 3222 on the shaft portion 3221 is exposed outside the cover body 12 through the shaft hole 124, so that the knob switch has good waterproof performance, and the base of the operation knob 32 is operated. The 321 is integrally formed with the operating rod 322, and is used for ensuring the practical effect of loosening or disengaging the base portion 321 and the operating rod 322 when the operating knob 32 is rotated. Therefore, the purpose, the function, and the like of the foregoing effects can be achieved. The device and the device shall be covered by this creation. Such simple modifications and equivalent structural changes shall be included in the scope of the patent of this creation and shall be combined with Chen Ming.

Therefore, this design is mainly for the structural improvement of the knob switch, in order to use the base of the insulating shell to provide the plurality of terminals of the terminal group, the rotary knob and the cover body, and then assemble the circuit turntable of the rotary knob above each terminal and penetrate the cover The base of the operating knob is disposed in the housing space of the body, and the shaft portion of the operating rod above the base portion penetrates into the waterproof gasket of the receiving groove, and the grip portion on the shaft portion passes through the shaft hole to expose the outside of the cover body. The knob has a good waterproof performance as the main protection point, and the base of the rotary knob's operation knob is integrally formed with the operating rod, so that when the rotary knob is rotated, the base and the operating lever can be prevented from loosening and disengaging. For the practical function of the operation of the rotary switch to ensure the stable and stable transmission of the electronic signal, the above description is only a preferred embodiment of the present invention, and thus the scope of the patent is not limited thereby, and therefore the specification of the creation is used. The contents of the schema are simple modifications, replacements, and equivalent structures, principles, etc. All should be included in the scope of the patent of this creation, and be combined with Chen Ming.

In summary, the structure of the above-mentioned knob switch of the present invention is improved in actual implementation and application, so that it can achieve its efficacy and purpose, so the creation is a practical and excellent research and development, in order to meet the requirements of the new patent application, Applying in accordance with the law, I hope that the trial committee will grant this case as soon as possible to protect the hard work of the creators. If there is any doubt in the arbitral tribunal, please do not hesitate to give instructions, the creators will try their best to cooperate and feel good.

1‧‧‧Insulated housing

11‧‧‧Base

110‧‧‧ accommodating slots

111‧‧‧Isolation convex

112‧‧‧ engaging section

12‧‧‧ Cover

120‧‧‧ accommodating space

122‧‧‧section operation slot

1221‧‧‧Limited convex body

123‧‧‧ Storage trough

1231‧‧‧Waterproof gasket

124‧‧‧Axis hole

2‧‧‧Terminal group

21‧‧‧ terminals

211‧‧‧Bounce arm

212‧‧‧Resistance

213‧‧‧welding section

3‧‧‧ Rotary button

31‧‧‧Circuit turntable

32‧‧‧Operation knob

321‧‧‧ base

3211‧‧‧Extended elastic arm

3212‧‧‧Connecting section

3213‧‧‧Flexible arm section

3214‧‧‧Card Department

322‧‧‧Operator

3221‧‧‧Axis

3222‧‧‧ grip

3223‧‧‧Drive Department

33‧‧‧Connecting Department

330‧‧‧Positioning holes

331‧‧‧Bump

Claims (6)

The utility model relates to a structural improvement of a rotary switch, which comprises an insulating outer casing, a terminal set and a rotary knob, wherein: the insulating outer casing comprises a base and a cover covered on the base, and the periphery of the base forms a class-shaped engaging section, and the top is concave. The accommodating groove has a plurality of isolation protrusions, and the cover body is covered over the accommodating groove of the base, and the accommodating space of the accommodating base is recessed at the bottom of the cover body, and the periphery of the accommodating space is embedded in the periphery of the pedestal. a step-like fitting section at the engaging section, and a section operation groove, a receiving groove for accommodating the waterproof gasket, and a shaft hole penetrating to the outside are sequentially disposed from the accommodating space to the top of the cover body; the terminal set is disposed in the insulating case The base includes a plurality of terminals positioned at the receiving slots of the base, and the terminals are respectively staggered toward the opposite sides to extend the elastic arms between the isolation protrusions, and the elastic arms are respectively disposed on the floating side to expose the isolation protrusions. a frictional section above the body, the other side of each elastic arm is a welding section which is disposed outside the bottom surface of the base in a vertical direction; and the rotating button is assembled in the inner receiving space of the cover of the insulating shell, including elastic resistance to The circuit turntable on each of the sub-groups is coupled to the operation knob on the circuit turntable, and the operation knob is provided with a base coupled to the circuit turntable, and the base is extended by the in-mold injection molding (Insert Molding) on the opposite side of the base 2 The arm and the second extending elastic arm are provided with two connecting sections which are separated from the preset strip by the other side of the exposed base, and form a predetermined spacing separation from the inner side of the two extending elastic arms, and the base and the second extend. The elastic arm is located in the section operating slot of the upper cover, and the operating base is integrally formed with the operating base and the two extending elastic arms are angularly displaced in the segment operating slot, and the operating lever comprises a receiving slot passing through the upper cover. The shaft of the waterproof gasket is integrally formed The shaft portion is provided with a gripping portion outside the shaft hole of the upper cover. The structural improvement of the knob switch according to the first aspect of the patent application, wherein the periphery of the base of the insulating shell is provided with at least one segment of the stepped section, and the recessed space of the bottom of the cover body is provided with at least one step difference. The fitting section is configured to be embedded in the engaging section of the base at the engaging section of the cover body and form a horizontal lateral limit stop. The structure of the rotary switch according to the first aspect of the invention is the structural improvement of the rotary switch, wherein the insulating outer casing is disposed on a side wall surface of the inner storage groove of the cover body, and at least one slit is formed through the shaft hole. The structure of the knob switch according to the first aspect of the patent application is improved, wherein the rotary knob is provided with a plurality of electrical contacts elastically contacting or separating from the contact portions of the terminals on the bottom surface of the circuit turntable, and the top surface of the circuit turntable is provided with The base portion of the base of the operating rod is connected to the connecting portion of the buckle, and the connecting portion is provided with at least two sets of positioning holes and protrusions which are mutually engaged with each other on the top surface of the circuit turntable and the bottom surface of the base. The structural improvement of the rotary switch according to the first aspect of the patent application, wherein the operation knob of the rotary knob is integrally formed by the insert molding in the in-mold injection molding, and the two extending elastic arms are formed on the opposite outer side from the base. Separating the predetermined spacing, and the two extending elastic arms are provided with elastic arm segments which are continuously turned along the outer side of the base portion to a distance greater than or equal to 1/2 of the width of the base portion, and respectively have a locking portion on the hanging side of the two elastic arm segments. And forming an elastic expansion and contraction interval between the inner side and the base portion of the two clamping portions at a predetermined interval; wherein the predetermined distance between the two extending elastic arms and the outer side of the base portion is 0.5 mm to 2.0 mm, preferably a predetermined spacing 1.38mm. The structure of the knob switch according to the first aspect of the patent application is improved, wherein the operation knob of the rotary button is provided with a driving part of a preset hand tool control on the top of the operation lever, and the driving part is a polygonal rod body for the preset hand tool, a one-shaped inlay for the preset hand tool, a cross-shaped groove for the cross-shaped screwdriver for the preset hand tool, or a polygon for the polygon The polygonal recessed groove embedded in the wrench.