Knob structure, knob assembly and measuring device

Abstract

The utility model provides a knob structure, a knob assembly and a measuring device. The knob structure comprises a knob shell and a light guide piece. The knob shell is provided with an open hole used for indicating the rotation direction. The light guide piece comprises a light inlet part and a light outlet part, and the light inlet part is used for obtaining light rays and guiding the light rays to the light outlet part; the light emitting part is connected to the knob shell and at least part of the light emitting part is exposed out of the opening so as to guide light out of the opening; and along a first direction parallel to the rotation axis of the knob shell, the light incident part and the opening are at least partially not overlapped. Wherein a first reflecting wall opposite to the open hole is arranged on one side, back to the open hole, of the light emitting part, and the distance between the first reflecting wall and the open hole is gradually reduced in the second direction from the light incident part to the light emitting part. According to the knob structure, the knob assembly and the measuring device, the problem that the brightness of the light-transmitting surface playing a role in indication on the knob cover is not uniform is solved through the reflection of the light on the first reflecting wall.

Description

Technical Field

[0001] The utility model relates to the field of instrument measurement, in particular to a knob structure, a knob component and a measuring device. Background Art

[0002] In order to facilitate the operation of the measuring instrument to switch between different gears, a knob cover is provided for twisting the control module of the measuring instrument to different gears. In order to facilitate the accurate rotation of the knob cover to the target position in dim light, a light-emitting element and a light-transmitting surface are provided at the edge of the knob cover, and the light of the light-emitting element is transmitted to the light-transmitting surface, so that the light-transmitting surface emits light, and the light-emitting light-transmitting surface has an indicating function. Considering that the light-transmitting surface is used to indicate the orientation of the knob cover, it is best to arrange the light-transmitting surface at the edge of the knob cover. However, due to the volume, small thickness and complex structure of the knob cover, the light-emitting element may not necessarily be arranged directly below the light-transmitting surface of the knob cover, and the light-emitting element needs to be arranged in a staggered manner with the light-transmitting surface to match the structure of the knob cover. When the light-emitting element is arranged in a staggered manner with the light-transmitting surface, the light of the light-emitting element is transmitted to the light-transmitting surface through the light guide, so that the light-transmitting surface emits light.

[0003] In the related art, when the light guide guides light to the light-transmitting surface, the light will be attenuated to a certain extent, resulting in the light-transmitting surface being brighter on the side close to the light-emitting element and darker on the side away from the light-emitting element, making the light-transmitting surface emit uneven light. Uneven light emission from the light-transmitting surface will affect the user experience and may cause user misoperation or inaccurate readings. Utility Model Content

[0004] The main purpose of the utility model is to provide a knob structure, a knob assembly and a measuring device, aiming to solve the technical problem of uneven brightness of the light-transmitting surface of the knob cover.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes a knob structure, which includes a knob shell and a light guide. The knob shell is provided with an opening for indicating the rotation direction. The light guide includes a light input portion and a light output portion, the light input portion is used to obtain light and guide the light to the light output portion; the light output portion is connected to the knob shell and at least partially exposed to the opening to output the light from the opening; along a first direction parallel to the rotation axis of the knob shell, the light input portion and the opening at least partially do not overlap. Among them, a first reflective wall opposite to the opening is provided on the side of the light output portion facing away from the opening, and the distance between the first reflective wall and the opening gradually decreases along a second direction from the light input portion to the light output portion.

[0006] In some embodiments, the light incident portion includes a first end facing away from the knob shell and a second end close to the knob shell, the first end is used to obtain light, the second end is connected to the light output portion or is separated from the light output portion along one side of the second direction, and a second reflective wall is provided on the side of the second end facing away from the light output portion; along the direction from the first end to the second end, the distance between the second reflective wall and the light output portion gradually decreases.

[0007] In some embodiments, the first reflective wall is provided with a first reflective coating, and the first reflective coating is used to reflect light; or, the first reflective wall is configured to reflect light by total reflection; or, the second reflective wall is provided with a second reflective coating, and the second reflective coating is used to reflect light; or, the second reflective wall is configured to reflect light by total reflection.

[0008] In some embodiments, the light incident portion and the light emitting portion are separately arranged and abut against or spaced apart from each other; or, the light incident portion and the light emitting portion are integrally arranged.

[0009] In some embodiments, the light emitting portion includes a protrusion arranged opposite to the first reflecting wall, and the protrusion is located in the opening or extends out of the opening.

[0010] In some embodiments, the knob structure also includes a light shading portion, which is located on the side of the light emitting portion away from the knob shell; the light shading portion is provided with a light through hole extending along the first direction, the end of the light incident portion away from the knob shell is fixed in the light through hole, and the side of the light through hole away from the light incident portion is provided with a fixing structure suitable for fixing the light-emitting element.

[0011] In some embodiments, the shading portion is fixed to the knob shell, and the hole axis of the light-through hole coincides with the rotation axis of the knob shell, and the shading portion is configured to bear the drive of the knob shell and rotate around the rotation axis of the knob shell; the knob structure is used to control the element to be controlled, and the shading portion includes a control structure, which is suitable for coupling with the element to be controlled, and the control structure controls the element to be controlled by rotating around the rotation axis.

[0012] In some embodiments, when observed along the first direction, the first reflective wall covers the opening; or, the first reflective wall is a plane wall; or, the light incident portion includes a first end facing away from the knob shell and a second end close to the knob shell, the first end is used to capture light, the second end is connected to the light output portion or is spaced from the light output portion on one side along the second direction, and a second reflective wall is provided on the side of the second end facing away from the light output portion; the second reflective wall is a plane wall; or, the light incident portion includes an incident wall for capturing light, and the rotation axis of the knob shell vertically passes through the incident wall.

[0013] The second aspect of the present invention discloses a knob assembly, which comprises the knob structure of any of the above embodiments and a light emitting element. The light emitting element is used to generate light and guide the light into the light part.

[0014] The embodiment of the third aspect of the utility model discloses a measuring device, which comprises the knob assembly of the above embodiment and a component to be controlled, wherein the component to be controlled is connected to the knob assembly.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The knob structure of the utility model includes a light-emitting portion having a first reflective wall, and the light enters the light-emitting portion from the light-entering portion, and then passes through the first reflective wall to the opening. The distance that the light passes through after entering the light-emitting portion along the second direction to reach the first reflective wall is L1, and the distance that the light passes through from the first reflective wall to the opening is L2. Along the second direction, the distance between the first reflective wall and the opening of the technical solution of the utility model gradually decreases. Therefore, the light that first hits the first reflective wall needs to pass through a longer distance to reach the opening, and the light that later hits the first reflective wall can reach the opening after a shorter distance, that is, when the light from the light-entering portion reaches the opening, the light that passes through the shorter L1 needs to pass through the longer L2, and the light that passes through the longer L1 needs to pass through the shorter L2. Therefore, the total distance (L1+L2) of each light ray from the light entrance to the opening is similar, and the attenuation degree of each light ray from the light entrance to the opening is equivalent, that is, the intensity of the light beam emitted from the opening is balanced, so that the opening of the knob structure emits light evenly. Therefore, the knob structure of the utility model can reduce the user's misreading and misoperation in a dark light environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the exploded structure of the knob assembly in one embodiment of the utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the exploded structure of the middle knob assembly viewed from another direction;

[0020] Figure 3 This is a schematic cross-sectional structure diagram of a knob assembly in one embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of an LED lamp connected to a PCB board in another embodiment of the utility model;

[0022] Figure 5 Schematic diagram of the structure of the light guide in the first embodiment of the utility model, wherein the straight line with an arrow is the transmission trajectory of the light path;

[0023] Figure 6 It is a schematic diagram of the structure of the light guide member in the second embodiment of the utility model, wherein the first reflective wall is a curved surface;

[0024] Figure 7It is a schematic structural diagram of a light guide member in the third embodiment of the utility model, wherein the light input portion and the light output portion are in contact with each other;

[0025] Figure 8 This is a schematic diagram of the structure of the light guide member in the fourth embodiment of the utility model, wherein the light input portion and the light output portion are integrally arranged;

[0026] Fig. 9 This is a schematic diagram of the structure of a knob housing in one embodiment of the utility model;

[0027] Fig.10 To look in the other direction Fig. 9 The structural schematic diagram of the knob housing shown;

[0028] Fig.11 To observe in another direction Fig. 9 The structural schematic diagram of the knob housing shown;

[0029] Fig.12 This is a structural schematic diagram of the light emitting portion in one embodiment of the utility model;

[0030] Fig.13 To look in the other direction Fig.12 The structural schematic diagram of the light output part is shown;

[0031] Fig.14 To observe in another direction Fig.12 The structural schematic diagram of the knob housing shown;

[0032] Fig.15 This is a schematic structural diagram of a light incident portion in one embodiment of the utility model;

[0033] Fig.16 To look in the other direction Fig.15 A schematic diagram of the structure of the light incident portion shown;

[0034] Fig.17 To observe in another direction Fig.15 Schematic diagram of the structure of the light incident part shown.

[0035] Description of Figure Numbers:

[0036] Knob housing 100;

[0037] Opening 110;

[0038] Light guide 200;

[0039] Light incident portion 210; first end portion 211; second end portion 212; second reflecting wall 213; first positioning member 214; second positioning member 215; third positioning member 216; incident wall 217; emitting wall 218;

[0040] Light emitting portion 220; first reflecting wall 221; protrusion 222; receiving wall 223; fourth positioning member 224;

[0041] shading part 300;

[0042] Light hole 310;

[0043] Positioning block 320; first mounting portion 321; second mounting portion 322; third mounting portion 323; fourth mounting portion 324;

[0044] Light emitting element 400;

[0045] First direction Y; second direction X.

[0046] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] In the related art, the brightness of the light-transmitting surface used to indicate the knob cover is uneven, which will affect the user experience and may cause misoperation or inaccurate readings.

[0049] Reference Figures 1 to 17 The utility model provides a knob structure, a knob assembly and a measuring device, aiming to solve the technical problem of uneven brightness of the light-transmitting surface of the knob cover. Figures 1 to 4 as well as Fig. 9 In some embodiments, the knob structure of the present invention includes a knob housing 100 and a light guide 200. The knob housing 100 has an opening 110 for indicating a rotational position, and light is transmitted from a light source to the opening 110 of the knob housing 100, so that the opening 110 of the knob housing 100 emits light, thereby indicating the rotational position of the knob housing 100.

[0050] Since the knob structure is relatively thin, it is difficult to arrange other components such as the light emitting element 400 directly below the opening 110. Figures 1 to 5In some embodiments, the light guide 200 guides the light path. The light guide 200 includes a light input portion 210 and a light output portion 220. The light output portion 220 is connected to the opening 110. The light is transmitted from the light input portion 210 to the light output portion 220 and finally emitted from the opening 110. The light guide 200 is connected to the knob housing 100 and at least partially exposed to the opening 110. The light guide 200 exposed to the opening 110 can guide the light to the opening 110.

[0051] Reference Figure 3 and Figure 5 In some embodiments, a first reflective wall 221 opposite to the opening 110 is provided on the side of the light exit portion 220 facing away from the opening 110, and the first reflective wall 221 is used to reflect the light from the light entrance portion 210 to the opening 110. The direction from the light entrance portion 210 to the light exit portion 220 is the second direction X, and along the second direction X, the distance between the first reflective wall 221 and the opening 110 gradually decreases. The distance that the light travels after entering the light exit portion 220 along the second direction X to reach the first reflective wall 221 is L1, and the distance that the light travels from the first reflective wall 221 to the opening 110 is L2. Since the distance between the first reflective wall 221 and the opening 110 gradually decreases along the second direction X, the light that first hits the first reflective wall 221 needs to travel a longer distance before hitting the opening 110, and the light that hits the first reflective wall 221 later can hit the opening 110 after a shorter distance, that is, when the light from the light incident portion 210 reaches the opening 110, the light that passes through the shorter L1 needs to pass through the longer L2, and the light that passes through the longer L1 needs to pass through the shorter L2. Therefore, the total distance (L1+L2) of each light from the light incident portion 210 to the opening 110 is similar, so the attenuation degree of each light from the light incident portion 210 to the opening 110 is similar, that is, the intensity of the light beam emitted from the opening 110 is balanced, so that the light at the opening 110 of the knob structure is uniform, so the knob structure of the utility model can reduce misreading and misoperation in a dark light environment.

[0052] Of course, it is understandable that the first reflective wall 221 can be a flat surface or a curved surface, as long as the total distance (L1+L2) of each light beam after entering the light exit portion 220 to reach the opening 110 is similar. Figure 5 In some embodiments, the first reflective wall 221 is a plane. The first reflective wall 221 is configured as a plane for ease of processing and installation. Figure 6 In some embodiments, the first reflective wall 221 is a curved surface. The first reflective wall 221 is configured as a curved surface to adapt to a thinner knob structure, and is convenient for installation on a knob structure with a smaller volume or a thinner thickness.

[0053] Reference Figures 1 to 5The light input portion 210 has a first end portion 211 away from the knob housing 100 and a second end portion 212 close to the knob housing 100. The first end portion 211 is used to obtain light, and the light source is arranged near the first end portion 211. The second end portion 212 is connected to the light output portion 220 on one side along the second direction X. The light of the light emitting element 400 is transmitted from the first end portion 211 of the light input portion 210 to the second end portion 212, and then transmitted from the second end portion 212 of the light input portion 210 to the light output portion 220. A second reflecting wall 213 is provided on the side of the second end portion 212 away from the light output portion 220. The second reflecting wall 213 is used to reflect the light from the first end portion 211, change the optical path of the light from the first end portion 211, and make the light from the first end portion 211 be emitted from the second end portion 212.

[0054] Reference Figure 3 and Figure 5 Specifically, along the direction from the first end 211 to the second end 212, the distance between the second reflecting wall 213 and the light emitting portion 220 gradually decreases. It is noted that the light travels a distance L3 from the first end 211 to the second reflecting wall 213, and the light travels a distance L4 from the second reflecting wall 213 to the second end 212. With such a configuration, the light with a longer L3 can be emitted from the second end 212 after passing through a shorter L4, and the light with a shorter L3 can be emitted from the second end 212 after passing through a longer L4. Therefore, the total travel distance (L3+L4) of each light ray entering the light input portion 210 from the first end 211 in the light input portion 210 is substantially the same, so the attenuation degree of each light ray entering the light input portion 210 from the first end 211 when passing through the light input portion 210 is similar. Therefore, the light rays entering the light input portion 210 from the first end portion 211 have the same light intensity when reaching the light output portion 220, and these light rays are then reflected by the first reflective wall 221 to obtain light rays emitted from the light output portion 220 with the same light intensity. The light rays emitted from the light output portion 220 enter the light input portion 210, and are emitted from the opening 110 after being reflected by the first reflective wall 221. Since the travel distance (L1+L2) of each light ray in the light output portion 220 is basically the same, the brightness at the opening 110 of the knob structure of the present invention is uniform.

[0055] Of course, it is understandable that the second reflective wall 213 can be a flat surface or a curved surface, as long as the total distance (L3+L4) of each light beam after entering the light incident portion 210 to reach the second end portion 212 is similar. Figure 3 and Figure 5 In some embodiments, the second reflective wall 213 is a plane. The second reflective wall 213 is set as a plane for easy processing and installation. In some embodiments, the second reflective wall 213 is a curved surface. The second reflective wall 213 is set as a curved surface to adapt to a thinner knob structure, which is convenient for installation in a knob structure with a smaller volume or a thinner thickness.

[0056] It can be understood that, in some embodiments, in order to match the structure of the knob housing 100 , the first reflective wall 221 and the second reflective wall 213 may be parallel, or the first reflective wall 221 and the second reflective wall 213 may not be parallel.

[0057] Of course, it is understandable that the light entrance portion 210 and / or the light exit portion 220 may be directly formed on the knob housing 100 by injection molding, or may be installed on the knob housing 100 .

[0058] It is understood that in some embodiments, the first reflective wall 221 is configured to reflect the light from the light incident portion 210 by total reflection. It is understood that in some embodiments, the second reflective wall 213 is configured to reflect the light from the light emitting element 400 by total reflection. Total reflection can completely reflect the light, avoid the energy loss of the light, and improve the luminous efficiency. It can also avoid the refraction of light between media, reduce the deflection and distortion of light, help maintain the purity and consistency of light, and help improve the stability of light beam transmission. Total reflection can also effectively reduce the loss of light during transmission, ensure the integrity and effective use of light, and thus make the luminous brightness at the opening 110 brighter.

[0059] It is understood that, in some embodiments, the first reflective wall 221 is provided with a first reflective coating, and the first reflective coating is used to reflect the light from the light incident portion 210. The first reflective coating is provided to improve the reflectivity of the first reflective wall 221, so that the first reflective wall 221 can reflect light more effectively. The first reflective coating can also reduce the loss of light during reflection, so that the light is reflected or transmitted more concentratedly, and the reflection efficiency of the light output portion 220 is improved. In some embodiments, the first reflective coating is composed of one or more layers of metal or compound films, which have high corrosion resistance and wear resistance, and can protect the light output portion 220, thereby extending the service life of the knob structure of the utility model. In addition, in some embodiments, in order to reflect light of different colors to distinguish different indication directions, the first reflective wall 221 can be designed and customized according to needs. The first reflective coating can realize the reflection of light in a specific wavelength range.

[0060] In some embodiments, the second reflective wall 213 is provided with a second reflective coating, and the second reflective coating is used to reflect light from the light source. The second reflective coating has a similar function to the first reflective coating. In some embodiments, the second reflective coating is made of different materials from the first reflective coating to maximize the reflection efficiency of the optical fiber at the light input portion 210. In some embodiments, in order to better match the first reflective coating, the second reflective coating is made of the same material as the first reflective coating.

[0061] The light incident portion 210 and the light emitting portion 220 may be separately provided and abut against or spaced apart from each other, or the light incident portion 210 and the light emitting portion 220 may be integrally provided. Figures 3 to 6 In some embodiments, the light input portion 210 and the light output portion 220 are separately provided to facilitate the processing of the light input portion 210 and the light output portion 220. The light input portion 210 and the light output portion 220 are spaced apart from each other to adapt to the knob structure of different installation spaces. Figure 7 In some embodiments, the light input portion 210 and the light output portion 220 abut against each other, which can reduce the loss of light in the air when the light enters the light output portion 220 from the light input portion 210 , thereby improving the luminous brightness at the opening 110 .

[0062] Reference Figure 8 In some embodiments, specifically, the light exit portion 220 and the light entrance portion 210 are integrally arranged. Due to the surface roughness, even if the light exit portion 220 and the light entrance portion 210 abut against each other, light will be lost at the wall where the light exit portion 220 and the light entrance portion 210 abut against each other. Therefore, the integral arrangement of the light exit portion 220 and the light entrance portion 210 can minimize the loss of light during the transmission process, thereby improving the luminous brightness at the opening 110.

[0063] Considering the different media, diffuse reflection will occur when the light enters the air from the light outlet 220. Diffuse reflection is the phenomenon that light is reflected at various angles on the medium interface and scattered in different directions in the new medium. This scattering will cause the light to show a randomly distributed direction when propagating in the medium. The light outlet 220 is provided with a protrusion 222, and the light is transmitted to the protrusion 222 and directly observed by the operator, so as to ensure the brightness of the indicated part of the knob structure when the operator observes. Figure 1 , Figure 3 as well as Figure 12 to Figure 14 In some embodiments, specifically, the light emitting portion 220 has a protrusion 222 arranged opposite to the first reflecting wall 221, and the light is reflected by the first reflecting wall 221 and then emitted from the protrusion 222. The protrusion 222 is located in the opening 110 or extends out of the opening 110. Therefore, the operator can directly observe the brightness of the protrusion 222. Compared with the light transmitted from the light emitting portion 220 to the opening 110 and then observed, the brightness of the protrusion 222 is higher and more convenient to observe.

[0064] Reference Figures 1 to 4 In some embodiments, the knob structure further includes a light shielding portion 300, which is located on the side of the light emitting portion 220 away from the knob housing 100. The light shielding portion 300 can shield the virtual light scattered by the light input portion 210 or the light emitting portion 220, thereby preventing the virtual light from affecting the operator's judgment of the orientation of the knob structure.

[0065] Reference Figures 1 to 4In some embodiments, the light shielding portion 300 is provided with a light through hole 310 extending along the first direction Y, and the end of the light input portion 210 away from the knob housing 100 is arranged in the light through hole 310. A fixing structure suitable for fixing the light-emitting element 400 is provided on the side of the light through hole 310 away from the light input portion 210. The light-emitting element 400 serves as a light source, and the light of the light-emitting element 400 is finally transmitted to the opening 110 through the light input portion 210 and the light output portion 220 for observation by the operator. Among them, the light-emitting element 400 can be an LED lamp, and the LED lamp can be directly fixed on the light shielding portion 300, or fixed on the light shielding portion 300 through a PCB.

[0066] By reducing the distance between the light emitting element 400 and the light incident portion 210, the brightness of the light entering the light incident portion 210 can be increased. Figures 1 to 4 It is understandable that, due to the limited position of the light-through hole 310, in some embodiments, when the volume of the light-emitting element 400 is large, it is adapted to the light-entering portion 210 with a smaller volume, and when the volume of the light-emitting element 400 is small, it is adapted to the light-entering portion 210 with a larger volume. In the light-through hole 310, the light-entering portion 210 can be made as close to the light-emitting element 400 as possible.

[0067] Reference Figures 1 to 4 It can be understood that, in some embodiments, the hole axis of the light hole 310 coincides with the rotation axis of the knob shell 100, the shading portion 300 is fixed to the knob shell 100, and the shading portion 300 is configured to bear the drive of the knob shell 100 and rotate around the rotation axis of the knob shell 100. The light-emitting element 400 is arranged in the light hole, and the light-emitting element 400 rotates with the rotation of the axis of the light hole 310. Compared with the light-emitting element 400 being arranged beside the rotation axis, the light-emitting element 400 of the utility model moves a shorter distance when the knob shell 100 rotates, and the halo effect is weak, so that the quality of the light beam transmitted to the light-entering portion 210 is better. The knob shell 100 rotates with the rotation of the shading portion 300, so the opening 110 of the knob shell 100 rotates with the rotation of the shading portion 300, so the orientation of the opening 110 of the knob shell 100 corresponds to the orientation of the shading portion 300.

[0068] The knob structure of the utility model is used to control the element to be controlled, and the control structure is arranged in the shading part 300, and the control structure is used to couple with the element to be controlled. When the shading part 300 rotates, the control structure rotates, thereby switching the coupling relationship between the control structure and the element to be controlled, and realizing the control of the device by the knob structure. The orientation of the opening 110 of the knob shell 100 corresponds to the orientation of the shading part 300, and the orientation of the shading part 300 corresponds to the coupling relationship between the control structure and the element to be controlled. Therefore, the orientation of the opening 110 of the knob shell 100 can give an indication to the user, so that the user can clearly understand the coupling relationship between the current control structure and the control element. Through the design of the embodiment of the utility model, the opening 110 of the knob shell 100 can emit light, thereby facilitating the user's operation and observation in a dark light environment.

[0069] Reference Figures 1 to 4 In some embodiments, when viewed along the first direction Y, the first reflective wall 221 covers the opening 110. The light from the light emitting portion 220 is emitted along the first direction Y through the first reflective wall 221, and the first reflective wall 221 covers the opening 110 along the first direction Y, so that the light emitted by the first reflective wall 221 covers the opening 110, so that all positions of the opening 110 can emit light, and the light intensity is uniform.

[0070] Reference Figures 1 to 4 as well as Figures 15 to 17 In some embodiments, the first end 211 of the light input portion 210 is used to obtain light, and the second end 212 of the light input portion 210 is connected to the light output portion 220 or spaced apart from the light output portion 220 along one side of the second direction X, and the light is transmitted from the first end 211 of the light input portion 210 to the second end 212, thereby entering the light output portion 220. The light input portion 210 has an incident wall 217, and the light enters the light input portion 210 from the incident wall 217. Specifically, the rotation axis of the knob housing 100 passes through the incident wall 217 vertically, so the light from the light emitting element 400 passes through the incident wall 217 vertically, thereby reducing the loss of light, thereby ensuring the quality of the light entering the light input portion 210.

[0071] The knob structure of the present invention has a structure of a light shielding portion 300, a light input portion 210 and a light output portion 220 that are easy to assemble. Figures 1 to 3 as well as Figures 15 to 17 Specifically, the light shielding portion 300 includes a positioning block 320, the positioning block 320 extends in a direction close to the knob housing 100, and the positioning block 320 includes a first mounting portion 321, a second mounting portion 322, and a third mounting portion 323. The light incident portion 210 is inserted into the positioning block 320, and specifically, the light incident portion 210 includes a first positioning member 214, a second positioning member 215, and a third positioning member 216, and the first positioning member 214, the second positioning member 215, and the third positioning member 216 are respectively assembled on the first mounting portion 321, the second mounting portion 322, and the third mounting portion 323.

[0072] Reference Figures 1 to 3 as well as Figures 15 to 17 In some embodiments, specifically, the second mounting member is cylindrical, the second mounting portion 322 is annular, and the second mounting member is inserted into the second mounting portion 322. Such a configuration facilitates the axial positioning of the light-entering portion 210 and the positioning block 320, and prevents the light-entering portion 210 from being off-axis. The second end portion 212 has a boss extending toward a plane perpendicular to the first direction Y and the second direction X. When the light-entering portion 210 is assembled on the positioning block 320, the boss abuts against the wall of the positioning block 320 facing the knob housing 100, so that the light-entering portion 210 is supported by the positioning block 320. The third positioning member 216 of the light-entering portion 210 is assembled on the third mounting portion 323 of the positioning block 320, so that when the knob housing 100 drives the light-entering portion 210 to rotate, the light-entering portion 210 can drive the positioning block 320 to rotate, thereby causing the knob housing 100 and the light-shielding portion 300 to rotate synchronously, and the rotation of the light-shielding portion 300 can switch the coupling relationship between the control element and the element to be controlled. The first positioning member 214 of the light incident portion 210 is assembled on the first mounting portion 321. The first positioning member 214 has a emitting wall 218. The depth of the first positioning portion is less than the length of the first positioning member 214, so that the emitting wall 218 is at least partially exposed to the outside along the first direction Y. Light enters the light incident portion 210 from the incident wall 217, and then is emitted to the light exit portion 220 from the exposed portion of the emitting wall 218.

[0073] Reference Figures 1 to 4 as well as Figure 12 to Figure 14 Specifically, in some embodiments, the light emitting portion 220 includes a fourth positioning member 224, the positioning block 320 includes a fourth mounting portion 324, and the fourth mounting portion 324 is located on a side of the first mounting portion 321 close to the light emitting portion 220 along the second direction X. Along the extending direction of the positioning block 320, the height of the fourth mounting portion 324 is lower than the first mounting portion 321, and the fourth positioning member 224 of the light emitting portion 220 is assembled on the fourth mounting portion 324, so that the receiving wall 223 of the light emitting portion 220 corresponds to the portion of the reflective wall of the light incident portion 210 that is higher than the fourth mounting portion 324 and thus exposed, so that light is transmitted from the light incident portion 210 to the light emitting portion 220.

[0074] Considering that the light of the light emitting element 400 enters the light input portion 210 through the positioning block 320, the assembly relationship between the light input portion 210 and the positioning block 320 will affect the optical path of the light after passing through the second reflective wall 212, so the assembly of the light input portion 210 and the positioning block 320 is provided with a foolproof structure to prevent the light input portion 210 from being reversely mounted on the positioning block 320 or the light input portion 210 from being reversely mounted on the positioning block 320. Figures 1 to 4 as well as Figures 15 to 17In some embodiments, specifically, the surface of the second mounting portion 322 for fixing the second positioning member 215 is an arc surface, the diameter of the second mounting portion 322 is larger than the first mounting portion 321 and the third mounting portion 323, and the first positioning member 214, the second positioning member 215 and the third positioning member 216 are respectively configured to match the first mounting portion 321, the second mounting portion 322 and the third mounting portion 323. With such a configuration, the second mounting member 215 cannot be confusedly inserted into the first mounting portion 321 or the third mounting portion 323, and plays a role in positioning the light incident portion 210 and the positioning block 320 when assembled.

[0075] Of course, it is understood that in some embodiments, reference Figures 1 to 4 as well as Figures 15 to 17 Specifically, in order to prevent the light input portion 210 from being inserted upside down into the positioning block 320, that is, to prevent the second end portion 212 of the light input portion 210 from being inserted into the positioning block 320 first, the second end portion 212 protrudes outward from the first end portion 211. With such a configuration, when the second end portion 212 is inserted into the positioning block 320 before the first end portion 211, since the calibers of the first mounting portion 321, the second mounting portion 322, the third mounting portion 323 and the fourth mounting portion 321 of the positioning block 320 all match the first end portion 211, the second end portion 212 protruding from the first end portion 211 will be blocked by the positioning block 320, thereby preventing the light input portion 210 from being inserted upside down into the positioning block 320.

[0076] Of course, it can be understood that in some embodiments, in order to prevent the light incident portion 210 from being reversely inserted into the positioning block 320, that is, to prevent the first positioning member 214 from being inserted into the third mounting portion 323 and the third positioning member 216 from being inserted into the first mounting portion 323, the length of the first positioning member 214 along the second direction is set to be longer than the length of the third positioning member 216, and / or the thickness of the first positioning member 214 is set to be thicker than the thickness of the third positioning member 216. Since the first mounting portion 321 matches the shape of the first positioning member 214 and the third mounting portion 323 matches the shape of the third positioning member 216, such a configuration will prevent the longer first positioning member 214 from being blocked by the third mounting portion 323 when being inserted into the third mounting portion 323, and / or the thicker first positioning member 214 from being blocked by the third mounting portion 323 when being inserted into the third mounting portion 323, thereby preventing the light incident portion 210 from being reversely installed into the positioning block 320.

[0077] Of course, it is understandable that in some embodiments, in order to prevent the light incident portion 210 from being reversely mounted on the positioning block 320, the first positioning member 214 and the third positioning member 216 with different shapes are provided, for example, the outer wall of the first positioning member 214 is an arc surface, and the outer wall of the third positioning member 216 is a plane, etc. By distinguishing the first positioning members 214 and the third positioning members 216 of different shapes, the positioning block 320 blocks the positioning members that do not correspond to the assembly position, thereby achieving a foolproof effect.

[0078] The present invention also provides a knob assembly, using the knob structure of the present invention, the knob assembly includes a light emitting element 400, and the light emitting element 400 is used to guide light into the light input portion 210. Figures 1 to 5 Specifically, in some embodiments, a first reflecting wall 221 opposite to the opening 110 is provided on the side of the light exit portion 220 facing away from the opening 110, and the first reflecting wall 221 is used to reflect the light from the light entrance portion 210 to the opening 110. The direction from the light entrance portion 210 to the light exit portion 220 is the second direction X, and along the second direction X, the distance between the first reflecting wall 221 and the opening 110 gradually decreases. The distance that the light travels after entering the light exit portion 220 along the second direction X to reach the first reflecting wall 221 is L1, and the distance that the light travels from the first reflecting wall 221 to the opening 110 is L2. Since the distance between the first reflective wall 221 and the opening 110 gradually decreases along the second direction X, the light that first hits the first reflective wall 221 needs to travel a longer distance before hitting the opening 110, and the light that later hits the first reflective wall 221 can hit the opening 110 after a shorter distance, that is, when the light from the light incident portion 210 reaches the opening 110, the light that passes through the shorter L1 needs to pass through the longer L2, and the light that passes through the longer L1 needs to pass through the shorter L2. Therefore, the total distance (L1+L2) of each light from the light incident portion 210 to the opening 110 is similar, so the attenuation degree of each light from the light incident portion 210 to the opening 110 is similar, that is, the intensity of the light beam emitted from the opening 110 is balanced, so that the light at the opening 110 of the knob structure is uniform, so the knob assembly of the utility model can reduce misreading and misoperation in a dark light environment.

[0079] The utility model also provides a measuring device, which can be an instrument such as a multimeter. Specifically, the measuring device includes the knob assembly of the utility model, and the measuring device also includes a to-be-controlled element, which is connected to the knob assembly. The knob assembly rotates to change the coupling relationship between the control element and the to-be-controlled element, thereby regulating the measuring device. Figures 1 to 5In some embodiments, specifically, a first reflecting wall 221 opposite to the opening 110 is provided on the side of the light exit portion 220 facing away from the opening 110, and the first reflecting wall 221 is used to reflect the light from the light entrance portion 210 to the opening 110. The direction from the light entrance portion 210 to the light exit portion 220 is the second direction X, and along the second direction X, the distance between the first reflecting wall 221 and the opening 110 gradually decreases. The distance that the light travels after entering the light exit portion 220 along the second direction X to reach the first reflecting wall 221 is L1, and the distance that the light travels from the first reflecting wall 221 to the opening 110 is L2. Since the distance between the first reflective wall 221 and the opening 110 gradually decreases along the second direction X, the light that first hits the first reflective wall 221 needs to travel a longer distance before hitting the opening 110, and the light that later hits the first reflective wall 221 can hit the opening 110 after a shorter distance, that is, when the light from the light incident portion 210 reaches the opening 110, the light that passes through the shorter L1 needs to pass through the longer L2, and the light that passes through the longer L1 needs to pass through the shorter L2. Therefore, the total distance (L1+L2) of each light from the light incident portion 210 to the opening 110 is similar, so the attenuation degree of each light from the light incident portion 210 to the opening 110 is similar, that is, the intensity of the light beam emitted from the opening 110 is balanced, so that the light at the opening 110 of the knob structure is uniform, so the measuring device of the utility model can reduce misreading and misoperation in a dark light environment.

[0080] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0081] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0082] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A knob structure, characterized in that: include: A knob housing having an opening for indicating a rotation direction; as well as A light guide, comprising a light input portion and a light output portion, wherein the light input portion is used to obtain light and guide the light to the light output portion; The light emitting portion is connected to the knob housing and at least partially exposed to the opening so as to guide the light out of the opening; Along a first direction parallel to the rotation axis of the knob housing, the light incident portion and the opening at least partially do not overlap; A first reflective wall opposite to the opening is provided on a side of the light emitting portion away from the opening, and a distance between the first reflective wall and the opening gradually decreases along a second direction from the light incident portion to the light emitting portion.

2. The knob structure according to claim 1, characterized in that: The light incident portion includes a first end away from the knob shell and a second end close to the knob shell, the first end is used to obtain the light, the second end is connected to the light emitting portion or spaced from the light emitting portion on one side along the second direction, and a second reflecting wall is provided on the side of the second end away from the light emitting portion; Along the direction from the first end to the second end, the distance between the second reflecting wall and the light exiting portion gradually decreases.

3. The knob structure according to claim 2, characterized in that: The first reflective wall is provided with a first reflective coating, and the first reflective coating is used to reflect the light; or, The first reflective wall is configured to reflect the light by total reflection; or, The second reflective wall is provided with a second reflective coating, and the second reflective coating is used to reflect the light; or, The second reflective wall is configured to reflect the light by total reflection.

4. The knob structure according to claim 1, characterized in that: The light input portion and the light output portion are separately arranged and abut against or spaced from each other; or, The light incident portion and the light emitting portion are integrally arranged.

5. The knob structure according to claim 1, characterized in that: The light exit portion includes a protrusion arranged opposite to the first reflective wall, and the protrusion is located in the opening or extends out of the opening.

6. The knob structure according to claim 1, characterized in that: The knob structure further includes a light shielding portion, which is located on a side of the light emitting portion away from the knob housing; The light shielding portion is provided with a light hole extending along the first direction, the end of the light incident portion away from the knob shell is fixed in the light hole, and a fixing structure suitable for fixing the light emitting element is provided on one side of the light hole away from the light incident portion.

7. The knob structure according to claim 6, characterized in that: The light shielding portion is fixed to the knob shell, and the hole axis of the light-through hole coincides with the rotation axis of the knob shell, and the light shielding portion is configured to be driven by the knob shell and rotate around the rotation axis of the knob shell; The knob structure is used to control the element to be controlled. The shading portion includes a control structure. The control structure is suitable for coupling with the element to be controlled, and the control structure controls the element to be controlled by rotating around the rotation axis.

8. The knob structure according to claim 1, characterized in that: When viewed along the first direction, the first reflective wall covers the opening; or, The first reflecting wall is a plane wall; or, The light incident portion includes a first end away from the knob shell and a second end close to the knob shell, the first end is used to obtain the light, the second end is connected to the light emitting portion or spaced from the light emitting portion on one side along the second direction, and a second reflecting wall is provided on the side of the second end away from the light emitting portion; the second reflecting wall is a plane wall; or, The light incident portion includes an incident wall for capturing light, and the rotation axis of the knob housing vertically passes through the incident wall.

9. A knob assembly, characterized in that: include: The knob structure according to any one of claims 1 to 8; The light emitting element is used to generate the light and guide the light into the light incident portion.

10. A measuring device, characterized in that include: The knob assembly according to claim 9; as well as The component to be controlled is connected to the knob assembly.

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