CN220253707U - Lamp holder and PID sensor - Google Patents

Abstract

The utility model provides a lamp holder and a PID sensor. The lamp holder comprises an insulating seat, an insulating end cover and a plurality of electrode plates; the insulating seat is provided with a through hole and a mounting opening which is transversely communicated with the through hole, and the opening surface of the mounting opening is exposed on the end surface of the insulating seat; the electrode plates comprise arc-shaped parts and extension parts, the arc-shaped parts of the electrode plates are arranged at intervals on the inner sides of the through holes of the insulating base, one end of each extension part of each electrode plate is connected with the corresponding arc-shaped part, and the other end of each extension part of each electrode plate penetrates through the corresponding mounting opening along the direction deviating from the center of the through hole and extends to the outside of the insulating base; the insulating end cover covers the through hole of the insulating seat and the end face where the opening face of the mounting port is located, and one end of the insulating end cover, which is away from the insulating seat, is closed. The lamp holder provided by the utility model has a simple structure, and can effectively ensure the machining precision. Through careful setting of the through-hole of insulating seat and the size of electrode slice arc portion, can effectively control the distance between the electrode slice, help reducing the equipment degree of difficulty and use cost.

Description

Lamp holder and PID sensor

Technical Field

The utility model relates to the technical field of gas detection, in particular to a lamp holder and a PID sensor.

Background

The PID (Photo Ionization Detectors, photoionization detector) sensor is also called PID gas detector, is used as a professional sensor for detecting VOCs (Volatile Organic Compounds ) in the fields of environmental protection and industrial safety, has the advantages of small volume, high response speed, high precision, continuous measurement and the like, and can detect VOCs and other toxic and harmful gases from extremely low concentration of 1ppb to higher concentration of 10000 ppm. Currently, PID sensors are widely used in detection of various organic chemicals, and particularly play an important role in disaster area accident leakage detection, accident area confirmation, leakage confirmation and the like.

In the PID sensor, whether the design of the lamp holder structure is reasonable is directly related to the performance and the cost of the sensor. The conventional PID sensor lamp socket is shown in fig. 1, and includes an electrode 11, a cylindrical electrode holder 12, and a plate-shaped cover plate 13. One end of the electrode holder 12 is fixed in the cover plate 13, and a through hole with two open ends is arranged on the electrode holder 12. The main body part of the electrode 11 is positioned in the through hole of the electrode seat 12, and the connecting part of the electrode 11 is positioned outside the electrode seat 12 and is attached to the surface of the cover plate 13. The connection portion of the electrode 11 is used for soldering a wire to electrically connect the electrode 11 with an external circuit board.

This structure has many problems such as the insufficient fit between the electrode sheet 11 and the electrode base 12, and easy deviation of positioning; the distance between the electrode pads 11 cannot be precisely ensured, and there is a safety risk. In addition, since the connection between the electrode tab 11 and the circuit board requires additional soldering wires and requires control of the length of the wires and the insulation distance between components of the circuit board, material costs and labor costs are increased.

It should be noted that the foregoing description of the background art is only for the purpose of facilitating a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background section of the present application.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present utility model is directed to a lamp holder and a PID sensor, which are used for solving the problems that the PID sensor in the prior art is insufficient in the design of the lamp holder, so that the electrode plate and the electrode holder are not firmly matched, the positioning is easy to deviate, the distance between the electrode plates cannot be accurately ensured, the safety risk exists, and the cost is increased due to the fact that additional welding wires are required for the connection between the electrode plates and a circuit board.

To achieve the above and other related objects, the present utility model provides a lamp holder, which includes an insulating base, an insulating end cover, and a plurality of electrode plates; the insulating seat is provided with a through hole and a mounting opening which is transversely communicated with the through hole, and the opening surface of the mounting opening is exposed on the end surface of the insulating seat; the electrode plates comprise arc-shaped parts and extension parts, the arc-shaped parts of the electrode plates are arranged at intervals on the inner sides of the through holes of the insulating base, one end of each extension part of each electrode plate is connected with the corresponding arc-shaped part, and the other end of each extension part of each electrode plate penetrates through the corresponding mounting opening along the direction deviating from the center of the through hole and extends to the outside of the insulating base; the insulating end cover covers the through hole of the insulating seat and the end face where the opening face of the mounting port is located, and one end of the insulating end cover, which is away from the insulating seat, is closed.

Optionally, the lamp holder includes a pair of symmetrical electrode plates that are arranged at intervals inside the through hole, and the arc-shaped part of each electrode plate is attached to the inner surface of the through hole.

Optionally, the extension part of the electrode slice is rectangular strip-shaped, and the corner of the free end of the extension part is a round angle or chamfer.

Optionally, the insulating end cover covers the insulating seat through interference fit, or the insulating end cover is connected with the insulating seat through welding, or the insulating end cover is connected with the insulating seat through threaded fit, or the insulating end cover is fixed on the end face of the insulating seat through a fastener.

Optionally, the circumference ring of insulating seat is equipped with the boss, the top surface that the boss is located is less than the top surface of the terminal surface of insulating seat, be provided with on the insulating end cover with boss assorted limit structure, limit structure card is located on the boss of insulating seat.

Optionally, the insulating base comprises a plastic base, and the insulating end cover comprises a plastic end cover.

Optionally, a plurality of mounting holes are further formed in the insulating base and located on the outer side of the through hole.

Optionally, the insulating end cover is centrally provided with a blind hole with a decreasing diameter in a direction away from the insulating seat.

The application also provides a PID sensor, the PID sensor includes ultraviolet lamp, circuit board, backup pad and the lamp stand of arbitrary scheme in above-mentioned, the ultraviolet lamp set up in the through-hole of lamp stand, and with the arc portion contact of electrode slice, the extension of electrode slice outwards extends to and contacts with the circuit board electricity, the circuit board is fixed in the backup pad, and the circuit board is located one side of lamp stand, the one end that insulating end cover deviates from insulating seat is located in the through-hole of backup pad.

Optionally, a pin is disposed at an end of the support plate facing away from the circuit board.

As described above, the lamp socket and the PID sensor of the present utility model have the following beneficial effects: the lamp holder provided by the utility model has a simple structure, and can effectively ensure the machining precision; through careful setting of the through-hole of insulating seat and the size of electrode slice arc portion, can effectively control the distance between the electrode slice. Furthermore, the electrode pads can be in direct electrical contact with the circuit board without the use of soldered wires. Therefore, the lamp holder and the PID sensor provided by the utility model have the advantages of simple processing and assembly process and the like, can effectively reduce the cost, and are suitable for automatic assembly.

Drawings

Fig. 1 shows an exemplary structural schematic diagram of a lamp socket of a PID sensor of the related art.

Fig. 2 shows a front view of a lamp socket according to the present utility model.

Fig. 3 shows a top view of the lamp socket provided by the utility model.

Fig. 4 and 5 show exploded views of fig. 2 from opposite directions.

FIG. 6 shows an exemplary schematic structure of a PID sensor provided by the utility model.

Fig. 7 is a schematic view of the partial structure of fig. 6.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. As described in detail in the embodiments of the present utility model, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of explanation, and the schematic drawings are only examples, which should not limit the scope of the present utility model. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

For ease of description, spatially relative terms such as "under", "below", "beneath", "above", "upper" and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these spatially relative terms are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. Furthermore, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or one or more intervening layers may also be present.

In the context of this application, a structure described as a first feature being "on" a second feature may include embodiments where the first and second features are formed in direct contact, as well as embodiments where additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex. In order to make the illustration as concise as possible, not all structures are labeled in the drawings.

Please refer to fig. 2 to fig. 7.

As shown in fig. 2 to 5, the present utility model provides a lamp socket 2, which lamp socket 2 can be used for installation of an ultraviolet lamp, and is particularly suitable for installation of an ultraviolet lamp in a PID sensor. The lamp holder 2 includes an insulating base 21, an insulating end cap 22, and a plurality of electrode pads 23. The electrode sheets 23 are typically arranged in pairs. For example, in the present embodiment, the two electrode plates 23 are symmetrically and spaced inside the through hole 211. The insulating base 21 is provided with a through hole 211 and a mounting opening 212 which is transversely communicated with the through hole 211, and an opening surface of the mounting opening 212 is exposed on an end surface of the insulating base 21. That is, the mounting opening 212 penetrates not only the side wall constituting the through hole 211 in the lateral direction, but also extends upward to the opening surface where the through hole 211 is located. The electrode plates 23 include arc portions 231 and extension portions 232, the arc portions 231 of each electrode plate 23 are disposed at intervals inside the through hole 211 of the insulating base 21, one end of each extension portion 232 of each electrode plate 23 is connected with the corresponding arc portion 231, and the other end of each extension portion 232 passes through the corresponding mounting hole 212 along a direction away from the center of the through hole 211 and extends to the outside of the insulating base 21, for example, to be electrically connected with an external circuit board. The arc shape 231 of the electrode tab 23 is generally curved to match the inner wall surface of the through hole 211. The insulating end cover 22 covers the through hole 211 of the insulating base 21 and the end surface where the opening surface of the mounting opening 212 is located (i.e. the insulating end cover 22 covers the through hole 211), and one end of the insulating end cover 22 facing away from the insulating base 21 is closed.

The exemplary assembling method of the lamp socket 2 provided in this embodiment is that a pair of electrode plates 23 are first placed in the through hole 211 of the insulating base 21 at intervals, the arc-shaped portion 231 of the electrode is attached to the inner side of the through hole 211, the extension portion 232 thereof is erected on the mounting opening 212 and extends to the outside of the insulating base 21, and then the insulating end cover 22 is fastened to the insulating base 21, so that the extension portion 232 of the electrode plate 23 is covered by the insulating end cover 22 to prevent the electrode plate 23 from sliding out of the insulating base 21, thereby realizing the assembling of the lamp socket 2.

When the lamp holder provided by the embodiment is used, the ultraviolet lamp 3 is inserted into the through hole 211 from one end of the through hole 211, which is far away from the insulating end cover 22, and the electrode plate 23 is attached to the outer wall of the lamp tube of the ultraviolet lamp 3. When the extension 232 of the electrode sheet 23 is electrically contacted with an external circuit board, an ac high voltage is generated in the circuit board, and the ac high voltage is conducted to the electrode sheet 23 through an electrical contact structure on the circuit board, for example, through a bonding pad on the circuit board, and then applied to the side wall of the ultraviolet lamp 3 through the electrode sheet 23, the ultraviolet lamp 3 is turned on, and the internally generated ultraviolet light is output to the outside through an ultraviolet output window of the ultraviolet lamp 3.

The lamp holder provided by the utility model has a simple structure, and can effectively ensure the machining precision. Through careful setting of the through-hole of insulating seat and the size of electrode slice arc portion, can effectively control the distance between the electrode slice. Furthermore, the electrode pads can be in direct electrical contact with the circuit board without the use of soldered wires. Therefore, the lamp holder provided by the utility model has the advantages of simple processing and assembly, and the like, can effectively reduce the cost, and is suitable for automatic assembly.

As an example, the electrode sheet 23 is preferably a metal conductive sheet having good elasticity, preferably a copper sheet or a gold-plated stainless steel sheet, which is easy to process into a desired shape while ensuring good conductive performance, and has good mechanical properties.

The insulating base 21 and the insulating end cover 22 may be made of various insulating materials, and the materials of the insulating base 21 and the insulating end cover may be the same or different, but preferably an insulating material with a certain elasticity is used to facilitate the processing into a required shape. For example, in a preferred embodiment, the insulating base 21 is a plastic base, and the insulating end cover 22 is a plastic end cover, but not limited thereto, and in other embodiments, a material such as silicone rubber may be selected.

The end surface of the insulating base 21 may be in a semicircular structure, and the through hole 211 is located in the center thereof. The size of the through hole 211 is matched with the size of the lamp tube to be mounted, and is not particularly limited. In some examples, the arc-shaped portion 231 of the electrode tab 23 may be fixed to the inner surface of the through hole 211 by a glue or the like. In another example, an arc-shaped retraction structure (that is, a portion corresponding to both sides of the radial protrusion 215 on the inner wall of the through hole 211) to which the electrode sheet 23 is fixed may be provided on the inner wall of the through hole 211, and retraction depths (that is, thicknesses of the radial protrusions 215) of both ends of the arc-shaped retraction structure are greater than the thickness of the electrode sheet 23. The radius of the arc retracting structure is larger than the radius of the arc of the through hole 211. At one end of the arcuate retraction structure is provided a mounting opening 212 through which the extension 232 of the electrode tab 23 is exposed. Since the number of mounting openings 212 is typically plural, for example, 2, there is an isolation structure between 2 mounting openings 212. In other examples, a groove for mounting the arc portion 231 of the electrode tab 23 may be provided in the inner wall of the through hole 211.

In some examples, the insulating base 21 is further provided with a plurality of mounting holes 214, which are located outside the through holes 211. The number of the mounting holes 214 is 2, for example, and symmetrically disposed on opposite sides of the through hole 211. The mounting holes 214 may be used to mount a detector of a fixed PID sensor or the like. In some examples, the insulating base 21 is circumferentially provided with a boss 213, and the top surface of the boss 213 is lower than the top surface of the end surface of the insulating base 21, so that the sidewall portion of the through hole 211 protrudes from the boss 213.

As an example, the insulating end cap 22 is also provided centrally with a circular lamp hole, which is a blind hole, allowing the uv lamp to pass through. In an example, as shown in fig. 4 and 5, the insulating end cover 22 includes an end cover main body 221 and a limiting structure 222 disposed at an end of the end cover main body, the limiting structure 222 is matched with the boss 213 of the insulating cover, and the limiting structure 222 is clamped on the boss 213 of the insulating base 21. Specifically, the limiting structure 222 includes a bottom surface 222b connected to the circumferential direction of the end cover body and an annular sidewall 222a connected to the bottom surface 222b, and the annular sidewall 222a is provided with an opening 223 corresponding to the isolation structure 215 of the insulating base 21. The end 224 of the insulating end cap 22 facing away from the spacing structure 222 is closed and the blind hole diameter decreases in the direction facing away from the spacing structure 222 (i.e. in the direction facing away from the insulating base 21), so that the insulating end cap 22 assumes a truncated cone-like shape. By closing the end of the insulating end cover 22 facing away from the insulating base 21, the through hole 211 in the lamp holder 2 can be reliably isolated from the external space, and the pouring sealant in the sensor is prevented from entering the lamp hole to influence the function of the lamp holder 2.

In the case that the insulating end cover 22 is provided with the limiting structure 222, the insulating end cover 22 may cover the insulating base 21 through interference fit. More specifically, the insulating end cover 22 is sleeved on the side wall of the through hole 211 of the insulating base 21 and abuts against the boss 213 on the insulating base 21. In other examples, the insulating end cover 22 and the insulating base 21 may be connected by a screw fit, i.e. the outer circumferential surface of the insulating base 21 is provided with external threads and the insulating end cover 22 is provided with corresponding matching internal threads. Alternatively, in other examples, the insulating end cover 22 may be fixed to the end surface of the insulating base 21 by a fastener, for example, by a screw or a snap structure, or the two may be fixed together by welding, which is not limited.

To ensure better electrical contact, in one example, the extension 232 of the electrode pad 23 is rectangular bar-shaped. And in a further example, the corners of the free end of the extension 232 (i.e., the end not directly connected to the arcuate portion 231) are rounded or chamfered or the free end is rounded. This helps to avoid damage to the contact points of the extension 232 when in direct contact with the circuit board 4 and to make the fit of the extension 232 and the circuit board 4 tighter.

In some examples, a grounding ring (not shown) of metal structure may also be provided on the lamp base 2. For example, the ground ring may be sleeved around the circumference of the main body of the insulating end cap 22. The provision of the ground ring contributes to an improved safety of the lamp holder 2.

The lamp socket 2 provided in this embodiment is particularly suitable for ultraviolet lamp installation in a gas detection sensor, and thus a PID sensor using the lamp socket 2 provided in this embodiment will be further described.

As shown in fig. 6 and 7, the present embodiment also provides a PID sensor including an ultraviolet lamp 3, a circuit board 4, a support plate 5, and a lamp socket 2 as described in any one of the above schemes. The foregoing description of the lamp socket 2 may be incorporated by reference herein in its entirety and will not be repeated for the sake of brevity. The ultraviolet lamp 3 is disposed in the through hole 211 of the lamp holder 2 and is in contact with the arc-shaped portion 231 of the electrode plate 23, the extension portion 232 of the electrode plate 23 extends outwards to be in electrical contact with the circuit board 4, the circuit board 4 is fixed on the support plate 5, the circuit board 4 is located on one side of the lamp holder 2, and one end of the insulating end cover 22, which is away from the insulating seat 21, is located in the through hole of the support plate 5.

The ultraviolet lamp 3 comprises, for example, a cylindrical body portion 31 (i.e., a lamp tube), one end of which cylindrical body portion 31 is provided with an ultraviolet output window 32, the size of the output window 32 being equal to or slightly larger than the size of the cylindrical body portion 31. The other end of the cylindrical body portion 31 facing away from the output window 32 is provided with a tapered tail portion 33.

The circuit board 4 is provided with electrical contacts corresponding to the extending portions 232 of the electrode pads 23, for example, two pads 41 are provided, and the pads 41 may be further provided with a U-shaped contact portion into which the end portions of the extending portions 232 may be inserted. The pad 41 may be directly soldered to the end of the extension 232.

The support plate 5 may be a circular plate, and a power input and signal processing circuit of a PID sensor may be disposed in the circular plate. In a further example, the end of the support plate 5 facing away from the circuit board 4 is provided with pins 51 to facilitate electrical contact of the PID sensor with other structures.

The PID sensor is also provided with ionization chambers, bias electrodes and other structures. Since this section is not part of the utility model of the present application and is known to those skilled in the art, this section is not developed in detail.

Due to the lamp holder provided by the application, the PID sensor provided by the embodiment has the advantages of simple structure, convenience in assembly and the like.

In summary, the present utility model provides a lamp holder and a PID sensor. The lamp holder comprises an insulating seat, an insulating end cover and a plurality of electrode plates; the insulating seat is provided with a through hole and a mounting opening which is transversely communicated with the through hole, and the opening surface of the mounting opening is exposed on the end surface of the insulating seat; the electrode plates comprise arc-shaped parts and extension parts, the arc-shaped parts of the electrode plates are arranged at intervals on the inner sides of the through holes of the insulating base, one end of each extension part of each electrode plate is connected with the corresponding arc-shaped part, and the other end of each extension part of each electrode plate penetrates through the corresponding mounting opening along the direction deviating from the center of the through hole and extends to the outside of the insulating base; the insulating end cover covers the through hole of the insulating seat and the end face where the opening face of the mounting port is located, and one end of the insulating end cover, which is away from the insulating seat, is closed. The lamp holder provided by the utility model has a simple structure, and can effectively ensure the machining precision. Through careful setting of the through-hole of insulating seat and the size of electrode slice arc portion, can effectively control the distance between the electrode slice. Furthermore, the electrode pads can be in direct electrical contact with the circuit board without the use of soldered wires. Therefore, the lamp holder and the PID sensor provided by the utility model have the advantages of simple processing and assembly process and the like, can effectively reduce the cost, and are suitable for automatic assembly. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. The lamp holder is characterized by comprising an insulating base, an insulating end cover and a plurality of electrode plates; the insulating seat is provided with a through hole and a mounting opening which is transversely communicated with the through hole, and the opening surface of the mounting opening is exposed on the end surface of the insulating seat; the electrode plates comprise arc-shaped parts and extension parts, the arc-shaped parts of the electrode plates are arranged at intervals on the inner sides of the through holes of the insulating base, one end of each extension part of each electrode plate is connected with the corresponding arc-shaped part, and the other end of each extension part of each electrode plate penetrates through the corresponding mounting opening along the direction deviating from the center of the through hole and extends to the outside of the insulating base; the insulating end cover covers the through hole of the insulating seat and the end face where the opening face of the mounting port is located, and one end of the insulating end cover, which is away from the insulating seat, is closed.

2. The lamp holder of claim 1, wherein the lamp holder includes a pair of electrode pads symmetrically and spaced apart from each other inside the through hole, and wherein the arcuate portion of each electrode pad is disposed against the inner surface of the through hole.

3. A lampholder as claimed in claim 1, characterized in that the extension of the electrode plate is rectangular strip-shaped, the corners of the free end of the extension being rounded or chamfered.

4. The lamp socket of claim 1, wherein the insulating end cap is covered on the insulating base through interference fit, or the insulating end cap is connected with the insulating base through welding, or the insulating end cap is connected with the insulating base through screw fit, or the insulating end cap is fixed on the end face of the insulating base through a fastener.

5. The lamp holder according to claim 4, wherein the circumferential ring of the insulating base is provided with a boss, the top surface of the boss is lower than the top surface of the end surface of the insulating base, the insulating end cover is provided with a limit structure matched with the boss, and the limit structure is clamped on the boss of the insulating base.

6. The lamp socket of claim 1 wherein the insulating base comprises a plastic base and the insulating end cap comprises a plastic end cap.

7. The lamp socket of claim 1, wherein the insulating base is further provided with a plurality of mounting holes located outside the through holes.

8. A lampholder as claimed in claim 1, characterized in that the insulating end cap is centrally provided with a blind hole of decreasing diameter in a direction away from the insulating base.

9. A PID sensor, characterized in that the PID sensor comprises an ultraviolet lamp, a circuit board, a support plate and a lamp holder according to any one of claims 1 to 8, the ultraviolet lamp is arranged in a through hole of the lamp holder and is contacted with an arc-shaped part of an electrode plate, an extension part of the electrode plate extends outwards to be in electrical contact with the circuit board, the circuit board is fixed on the support plate, the circuit board is positioned on one side of the lamp holder, and one end of the insulating end cover, which is away from the insulating seat, is positioned in the through hole of the support plate.

10. PID sensor according to claim 9, characterized in that the end of the support plate facing away from the circuit board is provided with pins.