CN215812987U - Input socket module for meter pen and universal meter - Google Patents

Abstract

The utility model relates to the technical field of measuring instruments and provides an input socket module for a meter pen and a universal meter. The input socket module comprises a socket shell, an input column and a photoelectric sensor, wherein the input column comprises an insulating sleeve and a conductive piece, the insulating sleeve is installed on the socket shell, the insulating sleeve is provided with a first installation hole, the conductive piece is installed in the first installation hole, the photoelectric sensor is installed on the socket shell, and the photoelectric sensor comprises a light-emitting light source and a receiving induction part. According to the input socket module and the multimeter provided by the utility model, light emitted by the light-emitting source of the photoelectric sensor can enter the first mounting hole, if the meter pen is inserted into the first mounting hole, the light forms reflected light when encountering the meter pen and then reaches the receiving induction part through the first through part, and information whether the meter pen is positioned in the first mounting hole is obtained according to the reflected light signal, so that a novel, stable and simple detection means for identifying whether the meter pen is positioned in the first mounting hole is provided, and the use safety of the meter is improved.

Description

Input socket module for meter pen and universal meter

Technical Field

The utility model relates to the technical field of measuring instruments, in particular to an input socket module for a meter pen and a universal meter.

Background

A multimeter is a magnetoelectric meter for measuring one or more electrical parameters of alternating current, direct current, voltage, resistance, audio level, capacitance, inductance, parameters of a semiconductor (e.g., β), and the like, and is also called a multiplex meter, a multi-use meter, a triple meter, a multi-use meter, and the like.

The multimeter is divided into a pointer multimeter and a digital multimeter according to the display mode.

Typically, multimeters include components such as a meter head, measurement circuitry, rotary switches, a display, and the like. The measuring circuit, the knob switch, the display and the like are all arranged on the meter head. The measuring circuit is a circuit for converting various measured electrical parameters into minute direct currents suitable for meter measurement, and generally includes a resistor, a semiconductor element, and a battery. The knob switch is used for selecting various measuring circuits so as to meet the measuring requirements of different types and different measuring ranges. The gauge outfit is equipped with a plurality of input jack and installs the input post in the input jack, and the input post passes through test lead and measuring circuit electric connection. The display provides a reading of the electrical parameter.

When the knob switch selects the measuring circuit for measuring a certain electrical parameter, the gauge pen is inserted into the corresponding input jack and electrically connected with the input column so as to be electrically connected with the measuring circuit, and then the measuring circuit is electrically connected with the object to be measured through the gauge pen, so that the electrical parameter of the object to be measured is measured, and the measuring result is displayed on the display.

In actual use, the user needs to manually detect whether the stylus has been inserted into the correct input jack. For example, a user selects a voltage measuring gear by using a knob switch, but a meter pen is inserted into an input jack of a measuring battery by mistake, so that a measuring circuit is short-circuited, and a universal meter is burnt. In the related technology known by the inventor, a photon emitter and a photon detector are respectively arranged on two sides of each input jack of the multimeter, and information whether a meter pen is positioned in the input jack is obtained through whether a light path is interrupted. Therefore, there is a need in the market to provide a new and simple detection means for identifying whether the stylus is located in the input jack, i.e. to be able to simply obtain the information whether the stylus is located in the input jack.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an input socket module for a meter pen and a universal meter, and aims to provide a novel and simple detection means for identifying whether the meter pen is positioned in a first mounting hole.

In order to achieve the purpose, the utility model adopts the technical scheme that: an input socket module for a stylus comprising:

a socket housing;

the input column comprises an insulating sleeve and a conductive piece, the insulating sleeve is arranged on the socket shell, a first mounting hole for inserting a meter pen is formed in the insulating sleeve, the conductive piece is arranged in the first mounting hole, and a first through part is formed in the hole wall of the first mounting hole;

the photoelectric sensor is installed on the socket shell and comprises a light-emitting source and a receiving induction portion, light emitted by the light-emitting source enters the first installation hole after passing through the first through portion, and the receiving induction portion is used for receiving reflected light from the first installation hole to judge whether the meter pen is inserted into the first installation hole or not.

In one embodiment, the socket housing has a second mounting hole, the insulating sleeve is mounted in the second mounting hole, the hole wall of the second mounting hole has a second through portion corresponding to the first through portion, and the photoelectric sensor is located outside the second mounting hole.

In one embodiment, the first through portion is a first through hole located at the bottom of the first mounting hole, the second through portion is a second through hole located at the bottom of the second mounting hole, and the insulating sleeve is inserted into the second mounting hole through the second through hole.

In one embodiment, the input socket module for a stylus pen further includes a first light guide member, one side of the first light guide member has a first light guide pillar for being inserted into the first through hole, and the photosensor is mounted on the other side of the first light guide member.

In one embodiment, each of the first light guide members is configured with a plurality of the first light guide posts.

In one embodiment, a first sealing ring is arranged between the first light guide pillar and the wall of the first through hole.

In one embodiment, the outer side wall of the first light guide pillar is provided with a first mounting part for accommodating the first sealing ring.

In one embodiment, a second sealing ring is arranged between the outer wall of the insulating sleeve and the wall of the second mounting hole.

In one embodiment, the first light guide is an insulator.

In one embodiment, the insulating sleeve is provided with a positioning hole for installing and positioning the conductive piece.

In one embodiment, the insulating sleeve is integrally injection-molded on the conductive member.

In one embodiment, the input socket module for the stylus pen further includes a second light guide, one end of the second light guide is mounted on the outer side wall of the socket housing, and the photoelectric sensor is mounted on the other end of the second light guide.

In one embodiment, the second light guide member includes a second light guide pillar corresponding to the position of the light emitting source and a third light guide pillar corresponding to the position of the receiving sensing portion, and the second through portion includes a first light through hole for installing the second light guide pillar and a second light through hole for installing the third light guide pillar.

In one embodiment, the position of the first through part corresponds to the position of the second light guide part, and the hole wall of the first mounting hole further has a reflecting surface opposite to the position of the first through part.

In one embodiment, at least one of the socket housing, the photosensor and the input post is removably mounted to a face piece of a multimeter.

In one embodiment, at least one of the socket housing, the photosensor and the input post is solder-fixed to a face case of a multimeter.

In one embodiment, at least one of the socket housing, the photosensor and the input post is injection molded to a face case of a multimeter.

The utility model also provides a multimeter which comprises at least one input socket module for the meter pen.

The input socket module for the meter pen and the universal meter have the advantages that: the light that photoelectric sensor's luminescent light source emitted gets into in the first mounting hole through first logical portion, if the pen-shape metre inserts and locates in the first mounting hole, light meets the pen-shape metre and forms the reverberation, reachs through first logical portion and receives the response portion again to whether acquire the information that the pen-shape metre is located first mounting hole according to reflected light signal, provide a neotype, simple discernment pen-shape metre and whether be located the detection means of first mounting hole, improved the security that the instrument used.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic diagram of a multimeter having four inputs according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a multimeter having three inputs according to an embodiment of the present invention;

FIG. 3 is a partial cross-sectional view of an input jack module for a stylus according to the present invention in assembled relation on a multimeter;

FIG. 4 is an exploded view of FIG. 3;

FIG. 5 is a cross-sectional view of the multimeter of FIG. 3 in use assembled with a stylus;

FIG. 6 is a schematic structural diagram of the photoelectric sensor of the input socket module for the stylus pen in FIG. 3;

FIG. 7 is a schematic structural diagram of a first light guide of the input socket module for a stylus pen in FIG. 3;

FIG. 8 is a cross-sectional view of the first light guide of FIG. 7;

FIG. 9 is a schematic structural diagram of an input column of the input socket module for the stylus according to the present invention;

FIG. 10 is a schematic view of another structure of an input column of the input socket module for the stylus according to the present invention;

FIG. 11 is a schematic structural diagram of another input socket module for a stylus according to an embodiment of the present invention;

FIG. 12 is a cross-sectional view of the input socket module for the stylus of FIG. 11;

FIG. 13 is an optical cross-sectional view of the input socket module for the stylus of FIG. 12;

FIG. 14 is an exploded view of the input socket module for the stylus of FIG. 11;

FIG. 15 is another perspective view of the input socket module for the stylus of FIG. 14;

FIG. 16 is a cross-sectional view of the input socket module for the stylus of FIG. 11 in assembled relation with the use of the stylus;

FIG. 17 is an exploded view of FIG. 16;

FIG. 18 is a schematic diagram of the input post of the input socket module for a stylus of FIG. 11;

FIG. 19 is a cross-sectional view of the input column of FIG. 18;

FIG. 20 is a partial cross-sectional view of the assembled relationship of the input jack module for a stylus of FIG. 11 on a multimeter;

FIG. 21 is a schematic view of the input jack module for a stylus of FIG. 11 in a connected relationship on a multimeter case;

FIG. 22 is a schematic view of an alternative connection of the input jack module for a stylus of FIG. 11 to a multimeter case.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to FIGS. 1 and 2, the present invention also provides a multimeter 10 comprising at least one input jack module for a stylus 20 as described in any of the following.

Referring to fig. 3 and 20, the input socket module for the stylus pen 20 in the present embodiment includes a socket housing 100, an input column 200, and a photoelectric sensor 300.

Referring to fig. 4, 11 and 12, the input column 200 includes an insulating sleeve 210 and a conductive member 220, the insulating sleeve 210 is mounted to the socket housing 100, a first mounting hole 211 for inserting the stylus pen 20 is formed in the insulating sleeve 210, the conductive member 220 is mounted in the first mounting hole 211, and a first through portion 212 is formed on a wall of the first mounting hole 211. The first through portion 212 has a permeability to allow light to pass therethrough.

With reference to fig. 5, 6 and 13, the photoelectric sensor 300 is mounted on the socket housing 100, the photoelectric sensor 300 includes a light emitting source 310 and a receiving sensing portion 320, light emitted from the light emitting source 310 enters the first mounting hole 211 through the first through portion 212, and the receiving sensing portion 320 is configured to receive reflected light from the first mounting hole 211 to determine whether the stylus 20 is inserted into the first mounting hole 211.

In this embodiment, the light emitted by the light source 310 of the photoelectric sensor 300 enters the first mounting hole 211 through the first through portion 212, if the stylus 20 is inserted into the first mounting hole 211, the light encounters the stylus 20 to form reflected light, and then returns to the receiving sensing portion 320 through the first through portion 212, so that the input socket module for the stylus 20 obtains information about whether the stylus 20 is located in the first mounting hole 211 according to the reflected light signal received by the receiving sensing portion 320, and a novel, stable and simple detection means for identifying whether the stylus 20 is located in the first mounting hole 211 is provided, thereby improving the safety of the use of the meter.

It should be noted that receiving sensor portion 320 of photosensor 300 is capable of converting the reflected light optical signal into an electronic signal that is processed to inform the user of the detection result, which may be performed by circuitry provided on sensor circuit board 330 of photosensor 300 or by an up-conversion circuit provided on main circuit board 17 of multimeter 10, which is provided by circuitry provided on main circuit board 17, and informs the user of the detection result. For example, multimeter 10 further includes an alarm electrically connected to main circuit board 17, and the alarm can display the detection result of the input socket module. The alarm can be selected as a buzzer or a signal lamp.

The hole wall of the first mounting hole 211 includes a side wall of the first mounting hole 211 and a bottom wall of the first mounting hole 211, so that the first through portion 212 may be located on the side wall of the first mounting hole 211 or on the bottom wall of the first mounting hole 211.

The reflected light signal includes the presence or absence of reflected light and also includes the reflection surface environment (reflection distance and angle) of the reflected light.

For example, referring to fig. 13, the first through portion 212 is located on a side wall of the first mounting hole 211, the photoelectric sensor 300 is located on a side portion of the input column 200, when the stylus 20 is not inserted into the first mounting hole 211, the light meets a hole wall on the other side of the first mounting hole 211 and is reflected back, when the stylus 20 is inserted into the first mounting hole 211, the light enters the first mounting hole 211 and is reflected back by the stylus 20 immediately, and a reflection distance, a reflection position, or a reflection angle of the reflected light changes, so that a reflected light signal changes, and the receiving sensing portion 320 can determine whether the stylus 20 is inserted into the first mounting hole 211.

For another example, referring to fig. 5, the first through portion 212 is located on the bottom wall of the first mounting hole 211, and the photosensor 300 is located at the bottom of the input column 200. If the receiving sensor 320 does not receive the reflected light, which indicates that the light does not encounter the stylus 20, it is determined that the stylus 20 is not inserted into the first mounting hole 211.

Compared with the scheme that the photoelectric sensor 300 is located on the side of the input column 200, the scheme that the photoelectric sensor 300 is located at the bottom of the input column 200 enables the photoelectric sensor 300 to judge whether the meter pen 20 is inserted into the first mounting hole 211 or not according to the existence of reflected light, the environment of a reflecting surface of the reflected light does not need to be analyzed, and the detection difficulty is greatly reduced. Moreover, since the longitudinal dimension of the first mounting hole 211 is larger than the lateral dimension of the first mounting hole 211, the photoelectric sensor 300 can easily identify whether the stylus 20 is present on the longitudinal dimension of the first mounting hole 211, and the detection accuracy is high. In addition, in the case that the photosensor 300 is located at the bottom of the input shaft 200, the light source 310 does not need to be aligned with the first through part 212 and the reflecting surface 213 (see fig. 19), and no specific requirement is made on the power of the light source 310.

The light source 310 of the photosensor 300 may be an emissive light emitting diode, and the receiving sensing portion 320 of the photosensor 300 may be a photodiode, a phototriode, a photoresistor, a photothyristor, or a photoreceiving darlington tube.

In this embodiment, referring to fig. 6 and fig. 15, the photoelectric sensor 300 is integrally designed, and integrates the light-emitting source 310 and the receiving sensing portion 320, so that the occupied space is small, the photoelectric sensor is convenient to be directly or indirectly mounted on the socket housing 100, and the input socket module for the stylus pen 20 is small in size.

In this embodiment, an input socket module for the meter pen 20 has the characteristics of modular design, is applicable to a plurality of multimeters 10, has strong universality, can reduce the cost of a mold, and is beneficial to reducing the cost of products in mass production.

In some embodiments, referring to FIG. 4, multimeter 10 includes a detachably connected face case 11 and a bottom case 12, and the input jack module for stylus 20 described above is mounted to face case 11. The first mounting hole 211 of the input column 200 communicates with the outside of the face case 11, so that the stylus pen 20 can be inserted into the first mounting hole 211 and electrically connected to the conductive member 220 positioned in the first mounting hole 211.

Optionally, referring to FIGS. 4 and 21, multimeter 10 further includes a battery 16 and a main circuit board 17 mounted between the top case 11 and the bottom case 12. The battery 16, the photosensor 300 and the conductive member 220 are electrically connected to the main circuit board 17, respectively. Battery 16 is used to provide electrical power to the components within multimeter 10. The photoelectric sensor 300 can transmit an electronic signal whether the stylus pen 20 is positioned in the first mounting hole 211 to the main circuit board 17. The stylus 20 is inserted into the first mounting hole 211 and electrically connected to the main circuit board 17 through the conductive member 220, so as to measure a corresponding electrical parameter by means of a measurement circuit of the main circuit board 17.

Specifically, referring to fig. 4, the photoelectric sensor 300 further includes a sensor circuit board 330, and the sensor circuit board 330 is electrically connected to the main circuit board 17.

Specifically, referring to fig. 1 and 2, multimeter 10 further includes at least one of a knob 13, a key 14, and a display window 15 mounted on case 11. The knob 13 is electrically connected to the main circuit board 17, so that a user can select measuring circuits of different electrical parameters by rotating the knob 13. The keys 14 are electrically connected with the main circuit board 17, and the keys 14 include at least one of a switch key, a mode key, a range key, a data holding key and a relative value key. The display window 15 is used to display a reading of the electrical parameter.

It should be noted that, the input socket module for the meter pen 20 can be applied to other operation and control devices that can be plugged in the meter pen 20 besides the multimeter 10, the input column 200 provides the first mounting hole 211 for the meter pen 20 to be electrically connected with the operation and control device, and the photoelectric sensor 300 can detect whether the meter pen 20 is inserted in the corresponding first mounting hole 211.

In some embodiments, referring to fig. 4, 5 and 13, the socket housing 100 has a second mounting hole 110, the insulating sleeve 210 is mounted in the second mounting hole 110, and the hole wall of the second mounting hole 110 has a second through portion 120 corresponding to the first through portion 212. The second through portion 120 is transparent, and does not block light emitted from the light source 310 from reaching the first through portion 212 and entering the first mounting hole 211. The second through-hole 120 may be used for passing light, and may also be used for mounting the insulating cover 210 or mounting the second light guide 410 described below. The photosensor 300 is located outside the second mounting hole 110. The second mounting hole 110 is used for mounting and protecting the input column 200.

In addition, the photo sensor 300 is installed on the outer wall of the socket housing 100 with a space from the input column 200, thereby isolating the weak current of the photo sensor 300 from the strong current of the conductive member 220, preventing the photo sensor 300 from being broken down by the strong current, and playing a role of protecting the photo sensor 300. Light emitted by the light source 310 passes through the first through portion 212 and then enters the first mounting hole 211, and if the meter pen 20 is disposed in the first mounting hole 211, the light is reflected by the meter pen 20 and then reaches the receiving sensing portion 320 through the first through portion 212.

Optionally, the receptacle housing 100 is a light-tight plastic housing.

Specifically, referring to fig. 5, 16 and 17, a gap is formed between the outer wall of the insulating sleeve 210 and the wall of the second mounting hole 110. The stylus pen 20 includes a stylus pen plug 21, the end of the stylus pen plug 21 has a plug insulating layer 22 and a conductive plug 23 located in the plug insulating layer 22, the plug insulating layer 22 is inserted into a gap between the outer wall of the insulating sleeve 210 and the hole wall of the second mounting hole 110, and the conductive plug 23 is inserted into the first mounting hole 211 and electrically connected to the conductive member 220.

In some embodiments, referring to fig. 4 and 5, the first through portion 212 is a first through hole 214 located at the bottom of the first mounting hole 211, the second through portion 120 is a second through hole 123 located at the bottom of the second mounting hole 110, and the insulating sleeve 210 is inserted into the second mounting hole 110 through the second through hole 123.

In fig. 5, an arrow positioned in the first mounting hole 211 indicates a moving direction of the light. Referring to fig. 5, the photoelectric sensor 300 is installed at the bottom of the first installation hole 211, light emitted by the light emitting source 310 enters the first installation hole 211 through the first through hole 214, if the stylus 20 exists, the receiving sensing portion 320 receives reflected light (see the arrow direction in the first installation hole 211 on the right side in fig. 5), otherwise, the light emitted by the light emitting source 310 directly exits from the first installation hole 211, and the receiving sensing portion 320 does not receive the reflected light (see the arrow direction in the first installation hole 211 on the left side in fig. 5), so that the input socket module for the stylus 20 can determine whether the stylus 20 is inserted into the first installation hole 211 according to whether the receiving sensing portion 320 receives the reflected light.

Specifically, referring to fig. 4, 7 and 8, the input socket module for the stylus pen 20 further includes a first light guide member 420, one side of the first light guide member 420 has a first light guide column 421 for being inserted into the first through hole 214, and the photosensor 300 is installed on the other side of the first light guide member 420.

The photosensor 300 is mounted to the receptacle housing 100 by the first light guide 420. The light emitted from the light source 310 passes through the first light guide 421 and enters the first mounting hole 211. The first light guide 420 is installed in the input column 200 through the first light guide 421.

In addition, the edge of the first light guide 420 optionally nests with the socket housing 100 to improve the connection strength. The first light guide member 420 can increase a safety distance between the photosensor 300 and the conductive member 220, and protect the photosensor 300.

Optionally, the first light guide member 420 is made of a transparent material.

Optionally, the first light guide 420 is an insulator to further isolate the strong current of the conductive member 220 from the photoelectric sensor 300.

Specifically, referring to fig. 4 and 7, each of the first light guide members 420 is configured with a plurality of first light guide posts 421. Several here means one or more than one, such as one, two, three, four, etc. One end of the first light guide column 421 is inserted into the first through hole 214, and the other end of the first light guide column 421 is mounted with the photoelectric sensor 300.

For example, referring to fig. 4 and 6, one first light guide member 420 is provided with two first light guide columns 421, so that one first light guide member 420 can implement installation and protection of two photosensors 300. When the number of the first mounting holes 211 is four, two first light guides 420 are used, so that the four photosensors 300 can be mounted and protected.

Specifically, referring to fig. 4, a first sealing ring 430 is disposed between the first light guide pillar 421 and the hole wall of the first through hole 214. First sealing washer 430 plays waterproof effect, prevents that the water droplet that comes into in the first mounting hole 211 can flow towards photoelectric sensor 300 direction along the pore wall of first through-hole 214, avoids multimeter 10's inside to intake.

Further, referring to fig. 7 and 8, the outer sidewall of the first light guide bar 421 has a first mounting portion 422 for receiving the first sealing ring 430, so as to facilitate mounting and positioning of the first sealing ring 430.

Optionally, the first mounting portion 422 is a first mounting groove or a first mounting step.

Specifically, referring to fig. 4, a second sealing ring 440 is disposed between the outer wall of the insulating sleeve 210 and the wall of the second mounting hole 110. Second sealing washer 440 plays waterproof effect, prevents that the water droplet that comes into in the second mounting hole 110 can flow towards photoelectric sensor 300 direction along the pore wall of second through-hole 123, avoids the inside of multimeter 10 to intake.

Fig. 9 is a schematic structural diagram of an input column 200 of an output socket module for a stylus pen according to the present invention, wherein fig. 9 (a) is an external structural diagram of the input column 200, fig. 9 (b) is a cross-sectional view of the input column 200, and fig. 9 (c) is a schematic structural diagram of a conductive member 220 of the input column 200.

Fig. 10 is another structural diagram of an input column 200 of an output socket module for a stylus pen according to the present invention, wherein fig. 10 (a) is an external structural diagram of the input column 200, fig. 10 (b) is a cross-sectional view of the input column 200, and fig. 10 (c) is a structural diagram of a conductive member 220 of the input column 200.

Further, referring to fig. 9 and 10, the outer sidewall of the insulating sleeve 210 has a second mounting portion 215 for receiving a second packing 440.

Optionally, the second mounting portion 215 is a second mounting groove or a second mounting step.

On the basis of the foregoing embodiment, referring to fig. 9 and 10, the insulating sleeve 210 has positioning holes 216 for mounting and positioning the conductive members 220, so as to ensure the connection reliability between the conductive members 220 and the insulating sleeve 210.

On the basis of the foregoing embodiments, referring to fig. 9 and 10, the insulating sleeve 210 is integrally injection-molded on the conductive member 220, so that the input column 200 has strong integrity, which is beneficial to improving the connection reliability between the input column 200 and the stylus pen 20.

On the basis of the foregoing embodiment, the conductive member 220 is a conductive sheet.

Alternatively, referring to fig. 9 (c), the conductive sheet is a circular conductive sheet.

Alternatively, referring to fig. 10, the conductive sheets include two semicircular conductive sheets.

In some other embodiments, referring to fig. 11 to 15, the input socket module for the stylus pen 20 further includes a second light guide 410, one end of the second light guide 410 is installed on the outer sidewall of the socket housing 100, and the photosensor 300 is installed on the other end of the second light guide 410. The second light guide 410 increases a safety distance between the photoelectric sensor 300 of weak current and the conductive member 220 of strong current, thereby protecting the photoelectric sensor 300.

Optionally, the second light guide 410 is an insulating member.

Optionally, the second light guide 410 is made of a light-transmitting material.

Specifically, referring to fig. 14 and 15, the second light guide 410 includes a second light guide column 411 and a third light guide column 412, the position of the second light guide column 411 corresponds to the position of the light emitting source 310, the position of the third light guide column 412 corresponds to the position of the receiving sensing portion 320, and the second light guide portion 120 includes a first light passing hole 121 for installing the second light guide column 411 and a second light passing hole 122 for installing the third light guide column 412. The second light guide column 411 and the third light guide column 412 guide the light path of the photosensor 300.

Optionally, the second light guide column 411 and the third light guide column 412 both have through holes to facilitate the passage of light. It is understood that the second light guide column 411 and the third light guide column 412 may also be transparent solid columns through which light can pass smoothly.

In this embodiment, the second through part 120 may be a transparent plate, instead of the first through hole 121 and the second through hole 122, through which light can pass smoothly.

Specifically, referring to fig. 18 and 19, the position of the first through portion 212 corresponds to the position of the second light guide member 410, and the hole wall of the first mounting hole 211 further has a reflection surface 213 opposite to the position of the first through portion 212. When the stylus pen 20 is not inserted into the first mounting hole 211, the light emitted from the light source 310 is reflected back to the receiving sensor 320 via the reflecting surface 213. When the stylus 20 is inserted into the first mounting hole 211, the light emitted by the light source 310 does not reach the reflecting surface 213, but is reflected back to the receiving sensing portion 320 through the plug insulating layer 22 and the conductive plug 23 of the stylus plug 21, and the reflecting environment of the light changes at this time, including the reflecting distance, the reflecting position, or the reflecting angle, so that the reflected light signal is changed, the receiving sensing portion 320 can obtain the information whether the stylus 20 is inserted into the input column 200 according to the reflected light signal, and make a positive response, convert the light signal into an electronic signal, and upload the electronic signal to the main circuit board 17 of the multimeter 10 for signal processing, so as to inform the user of the detection result.

In the foregoing embodiment, the first through portion 212 is a through hole or a transparent plate.

Based on the foregoing embodiments, the present invention provides an input socket module for a stylus 20 that can be mounted to a case 11 of multimeter 10 in a variety of ways.

For example, at least one of socket housing 100, photosensor 300, and input post 200 is removably mounted to face case 11 of multimeter 10.

Specifically, the lower end of the conductive member 220 is detachably connected to the face housing 11.

Referring to FIG. 21, a lower end of a conductive member 220 has external threads, multimeter 10 further includes a fastening member 18 and a connecting piece 19, one end of the connecting piece 19 is connected to the case 11, the other end of the connecting piece 19 has a hole for receiving the threaded end of the conductive member 220, and the fastening member 18 is threadedly connected to the threaded end of the conductive member 220 to clamp and fix the connecting piece 19.

As another example, at least one of socket housing 100, photosensor 300, and input post 200 are solder-secured to face case 11 of multimeter 10.

Specifically, the receptacle housing 100 is welded to the face shell 11.

Referring to fig. 22, the top end of the socket housing 100 is fixed to the face shell 11 by ultrasonic welding.

As another example, at least one of socket housing 100, photosensor 300, and input post 200 are injection molded to face case 11 of multimeter 10.

Specifically, referring to fig. 4 and 5, the socket housing 100 and the face housing 11 are integrally formed by injection molding.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (15)

1. An input socket module for a stylus, comprising:

a socket housing;

the input column comprises an insulating sleeve and a conductive piece, the insulating sleeve is arranged on the socket shell, a first mounting hole for inserting a meter pen is formed in the insulating sleeve, the conductive piece is arranged in the first mounting hole, and a first through part is formed in the hole wall of the first mounting hole;

the photoelectric sensor is installed on the socket shell and comprises a light-emitting source and a receiving induction portion, light emitted by the light-emitting source enters the first installation hole after passing through the first through portion, and the receiving induction portion is used for receiving reflected light from the first installation hole to judge whether the meter pen is inserted into the first installation hole or not.

2. The input socket module for a stylus according to claim 1, wherein: the socket shell is provided with a second mounting hole, the insulating sleeve is mounted in the second mounting hole, the hole wall of the second mounting hole is provided with a second through part, the position of the second through part corresponds to that of the first through part, and the photoelectric sensor is located outside the second mounting hole.

3. The input socket module for a stylus according to claim 2, wherein: the first through part is a first through hole located at the bottom of the first mounting hole, the second through part is a second through hole located at the bottom of the second mounting hole, and the insulating sleeve is inserted into the second mounting hole through the second through hole.

4. The input socket module for a stylus according to claim 3, wherein: the input socket module for the stylus further comprises a first light guide piece, a first light guide column inserted into the first through hole is arranged on one side of the first light guide piece, and the photoelectric sensor is mounted on the other side of the first light guide piece.

5. The input socket module for a stylus according to claim 4, wherein: each first light guide part is provided with a plurality of first light guide columns.

6. The input socket module for a stylus according to claim 4, wherein: a first sealing ring is arranged between the first light guide column and the wall of the first through hole.

7. The input socket module for a stylus according to claim 6, wherein: the outer side wall of the first light guide column is provided with a first mounting part for accommodating the first sealing ring.

8. The input socket module for a stylus according to claim 4, wherein: the first light guide member is an insulating member.

9. The input socket module for a stylus according to claim 3, wherein: and a second sealing ring is arranged between the outer wall of the insulating sleeve and the hole wall of the second mounting hole.

10. The input socket module for a stylus according to claim 2, wherein: the input socket module for the meter pen further comprises a second light guide piece, one end of the second light guide piece is installed on the outer side wall of the socket shell, and the photoelectric sensor is installed at the other end of the second light guide piece.

11. The input socket module for a stylus according to claim 10, wherein: the second light guide part comprises a second light guide column and a third light guide column, the position of the second light guide column corresponds to that of the light-emitting light source, the position of the third light guide column corresponds to that of the receiving induction part, and the second through part comprises a first light through hole used for installing the second light guide column and a second light through hole used for installing the third light guide column.

12. The input socket module for a stylus according to claim 10, wherein: the position of the first through part corresponds to the position of the second light guide piece, and the hole wall of the first mounting hole is also provided with a reflecting surface opposite to the position of the first through part.

13. An input socket module for a stylus according to any one of claims 1 to 12, wherein: the insulating sleeve is provided with a positioning hole for installing and positioning the conductive piece;

and/or the insulating sleeve is integrally injection-molded on the conductive piece.

14. An input socket module for a stylus according to any one of claims 1 to 12, wherein:

at least one of the socket housing, the photoelectric sensor and the input column is detachably mounted on a panel shell of a multimeter;

or at least one of the socket shell, the photoelectric sensor and the input column is welded and fixed on a panel shell of the multimeter;

or at least one of the socket shell, the photoelectric sensor and the input column is formed on a panel shell of the multimeter in an injection molding mode.

15. A multimeter, comprising: comprising at least one input socket module for a stylus according to any one of claims 1 to 14.

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