Photoelectric tube base and photoelectric tube assembly

Abstract

The utility model provides a photoelectric tube base and a photoelectric tube assembly. The photoelectric tube base is used for installing a photoelectric tube, the photoelectric tube comprises a packaging body wrapping a chip, the packaging body comprises a first part and a second part connected to the bottom side of the first part, the second part is provided with a boss protruding out of the peripheral wall of the first part, and the photoelectric tube base comprises a main body. A first mounting cavity used for mounting the first part and a second mounting cavity used for mounting the second part are formed in the main body, a limiting table protruding out of the cavity wall of the second mounting cavity is arranged in the first mounting cavity, and an abutting limiting face used for abutting against the boss is formed on the face, facing the second mounting cavity, of the limiting table; the cavity wall of the second mounting cavity extends downwards along the outer edge of the limiting table, and the length of the second mounting cavity in the vertical direction is not smaller than that of the second part in the vertical direction. Therefore, the installation height and the installation angle of the photoelectric tube have good consistency.

Description

TECHNICAL FIELD

[0001] The utility model relates to photoelectric technology field, specifically, relate to a kind of photoelectric tube base and photoelectric tube assembly. BACKGROUND

[0002] As a kind of photoelectric sensor, it realizes the work of sensor by the conversion between light and current / voltage, is applied in many fields.

[0003] Among them, straight insertion type photoelectric tube usually includes chip, lead frame and epoxy resin etc. Chip and part of lead frame are encapsulated in the inside of epoxy resin, to avoid contact with outside.

[0004] But in the production process of straight insertion type photoelectric tube, due to the tension of epoxy resin and the influence of lead frame at the bottom of epoxy resin, after the solidification of epoxy resin, uneven problem will inevitably appear at its bottom. This makes the position of straight insertion type photoelectric tube more difficult to be accurately uniform when it is installed on circuit board material, and the consistency of product is poor. When applied to some sensor products with higher angle requirements, the yield of product will be lower. INVENTION CONTENTS

[0005] In order to at least partially solve the problems existing in the prior art, according to one aspect of the utility model, a kind of photoelectric tube base is provided. The photoelectric tube base is used to install photoelectric tube, and the photoelectric tube includes a package body covering the chip, the package body includes a first part and a second part connected to the bottom side of the first part, the second part has a boss protruding from the peripheral wall of the first part, the photoelectric tube base includes a main body, a first mounting cavity for mounting the first part and a second mounting cavity for mounting the second part are formed inside the main body, a limiting table protruding from the cavity wall of the second mounting cavity is arranged in the first mounting cavity, one side of the limiting table facing the second mounting cavity is formed with an abutting limiting surface for abutting with the boss, and the cavity wall of the second mounting cavity extends downward along the outer edge of the limiting table, and the length of the second mounting cavity in the vertical direction is not less than the length of the second part in the vertical direction.

[0006] The photoelectric tube base provided in the application limits the relative position between the photoelectric tube and the photoelectric tube base through the abutting limiting surface. The bottom surface of the second mounting cavity contacts with the external mounting plane, so that the position of the installed photoelectric tube relative to the external mounting plane is more accurate and controllable. In this way, the angle of the chip in the installed photoelectric tube to emit and receive light can be ensured to be consistent, that is, the installation height and angle of the photoelectric tube have good consistency. When applied to sensor products, the yield of the sensor products can be better guaranteed.

[0007] Exemplarily, the second mounting cavity is provided with an elastic buckle for abutting against the second part, and the elastic buckle is arranged upwardly and obliquely to the inside of the second mounting cavity in connection with the cavity wall of the second mounting cavity.

[0008] Exemplarily, the cavity wall of the second mounting cavity is provided with a hollow structure, and the elastic buckle is exposed to the hollow structure.

[0009] Exemplarily, one end of the elastic buckle away from the cavity wall of the second mounting cavity is formed with an abutting end for abutting against the bottom wall of the second part.

[0010] Exemplarily, the cavity wall of the second mounting cavity is provided with a hollow structure extending upwardly and penetrating the cavity wall of the first mounting cavity.

[0011] Exemplarily, the outer peripheral surface of the main body comprises a planar portion and an arc surface portion, and two ends of the arc surface portion are connected in correspondence with two ends of the planar portion.

[0012] Exemplarily, the cavity wall of the first mounting cavity is formed with a first limiting surface for abutting against the outer wall of the first part.

[0013] Exemplarily, the cavity wall of the second mounting cavity is formed with a second limiting surface for abutting against the outer wall of the second part.

[0014] According to another aspect of the present application, there is also provided a photoelectric tube assembly. The photoelectric tube assembly comprises a photoelectric tube and any one of the photoelectric tube bases.

[0015] Exemplarily, the chip is arranged in the first part, and at least part of the structure of the first part protrudes from the main body in the vertical direction.

[0016] A series of simplified forms are introduced in the utility model content, which will be further described in detail in the specific embodiment part. The utility model content part is not limited to the key features and necessary technical features of the technical solutions to be claimed, and is not limited to the protection scope of the technical solutions to be claimed.

[0017] The advantages and features of the present application will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The following drawings of the present application are hereby incorporated as part of the present application for understanding the present application. The embodiments of the present application and the description thereof shown in the drawings are used to explain the principles of the present application. In the drawings,

[0019] Figure 1 is a side view of the photoelectric tube assembly according to one exemplary embodiment of the present application;

[0020] Figure 2Front view of the photoelectric tube assembly according to an exemplary embodiment of the present application;

[0021] Figure 3 Sectional view of the photoelectric tube assembly according to an exemplary embodiment of the present application;

[0022] Figure 4 Side view of the photoelectric tube base according to an exemplary embodiment of the present application;

[0023] Figure 5 Bottom view of the photoelectric tube base according to an exemplary embodiment of the present application;

[0024] Figure 6 Top view of the photoelectric tube base according to an exemplary embodiment of the present application;

[0025] Figure 7 Front view of the photoelectric tube base according to an exemplary embodiment of the present application;

[0026] Figure 8 Sectional view of the photoelectric tube base according to an exemplary embodiment of the present application;

[0027] Figure 9 Structure schematic diagram of the photoelectric tube according to an exemplary embodiment of the present application.

[0028] Among them, the above-mentioned drawings include the following reference signs:

[0029] 10, photoelectric tube base; 110, main body; 1101, first mounting cavity; 1102, second mounting cavity; 1110, limiting table; 1111, abutting limiting surface; 1130, hollow structure; 1141, plane part; 1142, arc surface part; 1150, first limiting surface; 1160, second limiting surface; 120, elastic buckle; 20, photoelectric tube; 210, chip; 220, package body; 2210, first part; 2220, second part; 2221, boss; 230, lead frame; 240, adhesive silver glue; 250, bonding wire. DETAILED DESCRIPTION

[0030] In the following description, a large number of details are provided in order to be able to thoroughly understand the present application. However, it can be appreciated by those skilled in the art that the following description only exemplarily shows the preferred embodiments of the present application, and the present application can be implemented without one or more such details. In addition, in order to avoid confusion with the present application, some technical features known in the art are not described in detail.

[0031] For a thorough understanding of the present application, a detailed description will be made in the following description. Obviously, the implementation of the present application is not limited to the special details familiar to those skilled in the art. The preferred embodiments of the present application are described in detail as follows, however, in addition to these detailed descriptions, the present application can have other embodiments.

[0032] An embodiment of the present application provides a phototube base, which can be used for installing a phototube. Figure 1 , Figure 3 , Figure 5 , Figure 8 and Figure 9The photoelectric tube 20 can include a package 220 covering the chip 210, the package 220 including a first portion 2210 and a second portion 2220 connected to a bottom side of the first portion 2210, the second portion 2220 having a boss 2221 protruding from a peripheral wall of the first portion 2210. The package 220 can be an epoxy resin formed by injection molding. The epoxy resin is in a viscous liquid state when injection molding, and becomes a solid after curing and no longer changes shape. The package 220 can protect the chip 210, the lead frame 230, and other structural components connected to the chip 210 from external contact. The photoelectric tube base 10 can include a main body 110 having a first mounting cavity 1101 for mounting the first portion 2210 and a second mounting cavity 1102 for mounting the second portion 2220 formed inside. The first mounting cavity 1101 is provided with a limiting table 1110 protruding from a cavity wall of the second mounting cavity 1102, one side of the limiting table 1110 facing the second mounting cavity 1102 can be formed with an abutting limiting surface 1111 for abutting against the boss 2221, and the cavity wall of the second mounting cavity 1102 extends downward along the outer edge of the limiting table 1110 and the length of the second mounting cavity 1102 in the vertical direction is not less than the length of the second portion 2220 in the vertical direction. The main body 110 can be made of polycarbonate (PC) or polyoxymethylene (POM) material. The main body 110 can be produced by mold injection. The shape of the first mounting cavity 1101 can be set according to the shape of the first portion 2210, and the shape of the second mounting cavity 1102 can be set according to the shape of the second portion 2220. Exemplarily, the first mounting cavity 1101 can be substantially cylindrical, and the second mounting cavity 1102 can be substantially cylindrical. The diameter of the first mounting cavity 1101 can be smaller than the diameter of the second mounting cavity 1102. The length of the limiting table 1110 in the vertical direction can be equal to the length of the first mounting cavity 1101, or in an embodiment not shown, the length of the limiting table in the vertical direction is less than the length of the first mounting cavity, as long as the limiting table abuts against the boss. It should be noted that, for the sake of description of the direction, the above is an example with the view angle shown in the figure, the second portion 2220 is mounted on the bottom side of the first portion 2210, and the second mounting cavity 1102 is located on the bottom side of the first mounting cavity 1101. The relative relationship between the components does not change when the angle of the photoelectric tube 20 and the photoelectric tube base 10 changes.

[0033] When the photocell 20 is installed with the photocell base 10, the photocell 20 can be inserted from the side of the second installation cavity 1102, and as the photocell 20 moves, the second part 2220 contacts and is limited by the abutting limiting surface 1111. When the second part 2220 abuts against the abutting limiting surface 1111, the installation is completed. Since the length of the second installation cavity 1102 in the vertical direction is not less than the length of the second part 2220 in the vertical direction, that is, when the second part 2220 abuts against the abutting limiting surface 1111, the bottom surface of the second installation cavity 1102 (that is, the end surface of the second installation cavity 1102 away from the first installation cavity 1101) can form an installation bottom surface that can be used for installation, that is, the bottom surface of the second installation cavity 1102 directly contacts the external installation plane. The shape of the photocell base 10 is more controllable, and the bottom surface of the second installation cavity 1102 can be more flat, which can avoid problems such as poor product consistency caused by height difference and uneven bottom surface of the encapsulation body 220 in the production process.

[0034] The photocell base 10 provided in the application limits the relative position between the photocell 20 and the photocell base 10 through the abutting limiting surface 1111. The bottom surface of the second installation cavity 1102 contacts the external installation plane, so that the position of the installed photocell 20 relative to the external installation plane is more accurate and controllable. In this way, the angle at which the chip 210 in the installed photocell 20 emits and receives light can be ensured to be consistent, that is, the installation height and angle of the photocell 20 have good consistency. When applied to a sensor product, the yield of the sensor product can be better ensured.

[0035] For example, with reference to Figure 5 and Figure 7 The body 110 can be substantially a hollow cylinder. The height H1 of the body 110 can be between 4.5mm and 5.5mm. For example, H1 can be 4.5mm, 5mm or 5.5mm. The outer diameter D1 of the body 110 can be between 5.5mm and 6mm. For example, D1 can be 5.5mm, 5.75mm or 6mm. The inner diameter D2 of the second installation cavity 1102 can be between 3.9mm and 4mm. For example, D2 can be 3.9mm, 3.95mm or 4mm.

[0036] For example, with reference to Figure 6 and Figure 8 The height H4 of the first installation cavity 1101 can be between 0.9mm and 1.1mm. For example, H4 can be 0.9mm, 1mm or 1.1mm. The inner diameter D3 of the first installation cavity 1101 can be between 2.8mm and 3.2mm. For example, D3 can be 2.8mm, 3mm or 3.2mm.

[0037] For example, with reference toFigure 1 、 Figure 3 、 Figure 4 and Figure 8 , the second installation cavity 1102 can be provided with an elastic buckle 120 for abutting against the second part 2220, the elastic buckle 120 can be connected to the cavity wall of the second installation cavity 1102 and be provided upwardly and inwardly inclined to the inside of the second installation cavity 1102. The elastic buckle 120 can be in a strip shape, one end of which is connected to the cavity wall of the second installation cavity 1102, and the other end thereof is relatively closer to the first installation cavity 1101 and closer to the center of the second installation cavity 1102. When the photocell 20 is installed into the photocell base 10, the elastic buckle 120 abuts against the photocell 20 to limit the second part 2220, so as to further limit the position of the photocell 20 relative to the photocell base 10, and ensure the stability of the position of the photocell 20. The structure of the elastic buckle 120 is simpler and the production cost is lower. In an embodiment not shown, any other structure can be used to limit the photocell.

[0038] For example, in combination with reference to Figure 1 、 Figure 4 and Figure 8 , the cavity wall of the second installation cavity 1102 can be provided with a hollow structure 1130, and the elastic buckle 120 is exposed to the hollow structure 1130. In this way, it is more convenient to operate the elastic buckle 120, and it is more convenient to observe whether the elastic buckle 120 is buckled in place. In an embodiment not shown, the outer wall of the main body corresponding to the second installation cavity can be closed, and the elastic buckle is arranged in the second installation cavity.

[0039] For example, in combination with reference to Figure 4 , the width L1 of the hollow structure 1130 can be between 2.3mm and 2.4mm. For example, L1 can be 2.3mm, 2.35mm or 2.4mm. The distance H2 between the hollow structure 1130 and the bottom end of the main body 110 can be not less than 0.9mm.

[0040] For example, in combination with reference to Figure 3 and Figure 8 , one end of the elastic buckle 120 away from the cavity wall of the second installation cavity 1102 is formed with an abutting end for abutting against the bottom wall of the second part 2220. That is, the abutting end abuts against the bottom wall of the second part 2220. When the photocell 20 is gradually inserted into the photocell base 10, the elastic buckle 120 is extruded outwardly, and when the boss 2221 abuts against the abutting limiting surface 1111, it is installed in place. At this time, the elastic buckle 120 is no longer extruded outwardly, and under the action of its elasticity, it returns to its original position and abuts against the bottom wall of the second part 2220. In this way, one side of the second part 2220 abuts against the abutting limiting surface 1111, and the other side abuts against the abutting end. The position of the second part 2220 in the vertical direction is completely limited, further ensuring the stability of the photocell 20 after installation.

[0041] Exemplarily, in combination with reference to Figure 4 and Figure 8 , the height H3 of the elastic buckle 120 is between 1.4 mm and 1.55 mm. For example, H3 can be 1.4 mm, 1.5 mm or 1.55 mm. The width L3 of the elastic buckle 120 is between 0.9 mm and 1.1 mm. For example, L3 can be 0.9 mm, 1 mm or 1.1 mm.

[0042] Exemplarily, in combination with reference to Figure 3 , Figure 4 and Figure 6 , the cavity wall of the second mounting cavity 1102 can be provided with a hollow structure 1130 extending upward and penetrating through the cavity wall of the first mounting cavity 1101. The hollow structure 1130 thus arranged can better avoid shielding the chip 210 in the first part 2210, without affecting the light emission and light receiving efficiency of the chip 210.

[0043] Exemplarily, in combination with reference to Figure 5 and Figure 6 , the outer peripheral surface of the main body 110 can include a planar portion 1141 and an arc surface portion 1142, and the two ends of the arc surface portion 1142 can be respectively connected to the two ends of the planar portion 1141 in a head-to-tail corresponding manner. In this way, the main body 110 can have the difference between the planar and arc surfaces in appearance. The photoelectric tube 20 on the market is usually provided in a planar and cylindrical arc surface structure, so as to facilitate the differentiation of the different connection properties of the two pins of the photoelectric tube 20. In the present embodiment, the outer peripheral surface of the main body 110 includes the planar portion 1141 and the arc surface portion 1142, which can better cooperate with the photoelectric tube 20 and play a role of anti-reversal. The arrangement of the arc surface portion 1142 and the planar portion 1141 can better avoid affecting the emission and reception of light at the light emitting surface at the top of the photoelectric tube assembly after installation.

[0044] Exemplarily, in combination with reference to Figure 6 , the planar portion 1141 and the hollow structure 1130 can be respectively arranged on opposite sides of the axis. The distance L2 between the planar portion 1141 and the axis and the distance L4 between the hollow structure 1130 and the axis can be the same. Exemplarily, L2 and L4 can both be 2.475 mm.

[0045] Exemplarily, in combination with reference to Figure 3 , Figure 8 and Figure 9 , the cavity wall of the first mounting cavity 1101 can be formed with a first limiting surface 1150 for abutting with the outer wall of the first part 2210. In this way, the first limiting surface 1150 abuts with the outer wall of the first part 2210, limiting the photoelectric tube 20 in the horizontal direction, and ensuring the stability of the relative position between the photoelectric tube 20 and the photoelectric tube base 10.

[0046] Exemplarily, continuing to combine with reference to Figure 3 , Figure 8 and Figure 9 , the cavity wall of the second mounting cavity 1102 can be formed with a second limiting surface 1160 for abutting with the outer wall of the second part 2220. In this way, the second limiting surface 1160 abuts with the outer wall of the second part 2220, limiting the photocell 20 in the horizontal direction, and ensuring the stability of the relative position between the photocell 20 and the photocell base 10.

[0047] According to another aspect of the present application, a photocell assembly is also provided. In combination with reference to Figure 1 , Figure 2 and Figure 3 , the photocell assembly can include the photocell 20 and any of the photocell bases 10 described above. The first part 2210 can be partially mounted in the first mounting cavity 1101, and the second part 2220 can be mounted in the second mounting cavity 1102. Since the present photocell base 10 adopts the technical solutions of any of the above embodiments, the photocell assembly at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0048] Exemplarily, in combination with reference to Figure 1 , Figure 2 and Figure 9 , the photocell 20 can be a straight-in photocell. Specifically, the photocell 20 can further include a lead frame 230, a chip 210, an adhesive silver paste 240, and a bonding wire 250. The lead frame 230 can be made of metal. Exemplarily, the lead frame 230 can be made of iron, copper or other alloy materials, which is used as a bottom bearing structure of the chip 210 and the bonding wire 250, and also as a linking structure of the chip 210 and the external circuit. The chip 210 is part of the main body 110 of the photocell 20, which is used to realize the conversion between light and current / voltage. The adhesive silver paste 240 is connected between the bottom surface of the chip 210 and the lead frame 230, to adhere and fix the chip 210. The adhesive silver paste 240 can include adhesive resin and conductive particles such as silver. When the chip 210 has electrodes on the bottom surface, the silver paste also plays the role of electrical connection between the chip 210 electrodes and the lead frame 230. The bonding wire 250 can be made of metal with good electrical conductivity such as gold, silver or aluminum alloy, which is used to connect the chip 210 electrodes and the lead frame 230, so that the chip 210 and the external circuit are electrically connected. The encapsulant 230 can include epoxy resin, to wrap and protect the chip 210, the bonding wire 250 and part of the lead frame 230.

[0049] Exemplarily, in combination with reference to Figure 2 and Figure 3The chip 210 can be disposed in the first portion 2210, and at least part of the structure of the first portion 2210 protrudes from the main body 110 in the vertical direction. In this way, the first portion 2210 can be better exposed, and the light emission and light receiving efficiency of the chip 210 can be avoided. Further, the position of the chip 210 in the vertical direction can be located outside the main body 110.

[0050] In the description of the present application, it should be understood that the orientation words such as "front", "back", "up", "down", "left", "right", "horizontal", "vertical", "vertical", "horizontal" and "top", "bottom" and the like indicate the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, without the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the protection scope of the present application; the orientation words "in" and "out" refer to the inside and outside of the contour of each component.

[0051] For the convenience of description, regional relative terms such as "on", "above", "upper surface", "upper" and the like can be used here to describe the regional position relationship of one or more components or features shown in the figure with other components or features. It should be understood that the regional relative terms not only include the orientation of the components described in the figure, but also include different orientations in use or operation. For example, if the components in the figure are inverted as a whole, the components "above" or "on" other components or features will include the case of "below" or "under" other components or structures. Therefore, the example term "above" can include both "above" and "below". In addition, these components or features can also be positioned at other different angles (for example, rotated by 90 degrees or other angles), and this document is intended to include all these cases.

[0052] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, they indicate the presence of the features, steps, operations, components, assemblies and / or combinations thereof.

[0053] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and in the above-described drawings are used only for distinguishing between similar objects and do not necessarily have to describe a specific sequential or chronological order. It is to be understood that the data so distinguished can be interchanged, under appropriate circumstances, such that the embodiments of the present application described herein can be practiced in other than the illustrated or described order.

[0054] The utility model has carried on the explanation through the above embodiment, but should understand, the above embodiment is only for example and the purpose of explanation, and not intend to limit the utility model to the range of described embodiment. In addition, the skilled in the art can understand that the utility model is not limited to the above embodiment, and more kinds of variations and modifications can be made according to the teaching of the utility model, and these variations and modifications all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the attached claims and its equivalent scope.

Claims

1. A phototube base for mounting a phototube, the phototube comprising an encapsulation body covering a chip, the encapsulation body comprising a first portion and a second portion connected to the bottom side of the first portion, the second portion having a boss protruding from the outer peripheral wall of the first portion, characterized in that, The phototube base includes a main body, inside which are formed a first mounting cavity for mounting the first part and a second mounting cavity for mounting the second part. A limiting platform protruding from the cavity wall of the second mounting cavity is provided in the first mounting cavity. The side of the limiting platform facing the second mounting cavity has an abutting limiting surface for abutting against the protrusion. The cavity wall of the second mounting cavity extends downward along the outer edge of the limiting platform, and the length of the second mounting cavity in the vertical direction is not less than the length of the second part in the vertical direction.

2. The phototube base according to claim 1, characterized in that, The second mounting cavity is provided with an elastic buckle for abutting against the second part. The elastic buckle is connected to the cavity wall of the second mounting cavity and is inclined upward and towards the interior of the second mounting cavity.

3. The phototube base according to claim 2, characterized in that, The cavity wall of the second mounting cavity is provided with a hollow structure, and the elastic buckle is exposed in the hollow structure.

4. The phototube base according to claim 2, characterized in that, The end of the elastic buckle away from the cavity wall of the second mounting cavity has an abutment end for abutting against the bottom wall of the second part.

5. The phototube base according to claim 1, characterized in that, The wall of the second mounting cavity is provided with a hollow structure that extends upward and penetrates the wall of the first mounting cavity.

6. The phototube base according to claim 1, characterized in that, The outer peripheral surface of the main body includes a flat portion and an arc-shaped portion, and the two ends of the arc-shaped portion are respectively connected to the two ends of the flat portion.

7. The phototube base according to claim 1, characterized in that, The cavity wall of the first mounting cavity is formed with a first limiting surface for fitting against the outer wall of the first portion.

8. The phototube base according to claim 1, characterized in that, The cavity wall of the second mounting cavity is formed with a second limiting surface for fitting against the outer wall of the second part.

9. A phototube assembly, characterized in that, It includes a phototube and a phototube base as described in any one of claims 1 to 8.

10. The phototube assembly according to claim 9, characterized in that, The chip is disposed within the first part, and at least a portion of the structure of the first part protrudes from the body in the vertical direction.

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