Ultrasonic sensor convenient for automatic production

Abstract

The utility model discloses an ultrasonic sensor convenient for automatic production, which comprises a metal shell and a rear cover, and the rear cover is provided with two through mounting holes. One end of one terminal is arranged in the mounting hole; one end of one lead is correspondingly connected with the other ends of the two terminals; the piezoelectric element is adhered to the bottom of the metal shell; the other end of the lead is connected with the piezoelectric element; a limiting cavity is formed in the metal shell, and the rear cover is clamped in the limiting cavity; the connecting sheet is arranged in the rear cover, and one end of the connecting sheet is arranged in one mounting hole; two ends of the leading-out terminal wire are respectively connected with one end of the terminal and the connecting sheet positioned in the mounting hole; and the pin is used for fixing the rear cover on the metal shell, and one end of the pin is fixedly connected with the connecting sheet.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic sensors, and more particularly to an ultrasonic sensor that is convenient for automated production. Background Art

[0002] Ultrasonic sensors, which are easy to automate, are widely used in industry, national defense, biomedicine, etc., using ultrasound as a means of detection to detect distance.

[0003] The existing ultrasonic sensor that is easy to produce automatically has a main structure including a metal shell, a piezoelectric element installed on the bottom end surface of the metal shell, positive and negative leads, lead-out terminal wires with PCB and a seal. The metal shell is a cylindrical hollow shell with an opening at one end. The lead-out terminal wires are mostly twisted pairs or double-row wires, which are welded to the positive and negative pads of the PCB. The piezoelectric element is mostly bonded to the bottom end surface of the metal shell with epoxy resin glue. One end of the positive lead wire is connected to the positive electrode of the piezoelectric element, and the other end is connected to the positive pad of the lead-out terminal wire. One end of the negative lead wire is connected to the negative electrode of the piezoelectric element or the metal shell, and the other end is connected to the negative pad of the lead-out terminal wire. The lead-out terminal wire is fixed to the filling glue in the metal shell by glue. The overall structure is complex, the degree of automation is low, the cost is high, and the production cycle is long. Utility Model Content

[0004] The utility model aims to provide an ultrasonic sensor which is easy to produce automatically, so as to solve the technical problems in the background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An ultrasonic sensor that is easy to produce automatically, comprising: a metal shell and

[0007] A rear cover, wherein the rear cover is provided with two penetrating mounting holes;

[0008] A terminal, one end of which is disposed in the mounting hole;

[0009] A lead wire, one end of which is connected to the other ends of the two terminals correspondingly;

[0010] A piezoelectric element is bonded to the bottom of the metal shell; the other end of the lead is connected to the piezoelectric element;

[0011] A limiting cavity is provided in the metal shell, and the rear cover is engaged in the limiting cavity;

[0012] A connecting piece, the connecting piece is built into the back cover, and one end of the connecting piece is placed in one of the mounting holes;

[0013] A lead-out terminal wire, two ends of which are respectively connected to one end of the terminal and a connecting piece located in the mounting hole;

[0014] A pin is used to fix the back cover on the metal shell, and one end of the pin is fixedly connected to the connecting piece.

[0015] In some embodiments, a cavity is provided in the metal shell in a first direction, the piezoelectric element is arranged at the bottom of the cavity, the metal shell is provided with the limiting cavity in a second direction, and two ends of the limiting cavity are located on both sides of the cavity.

[0016] In some embodiments, the first direction and the second direction are perpendicular.

[0017] In some embodiments, the back cover includes a middle section and two ends, the two ends of the back cover are arc-shaped, and the shapes of the two ends of the limiting cavity are adapted to the shapes of the two ends of the back cover; the mounting hole is opened in the middle section.

[0018] In some embodiments, a limiting step is provided in the mounting hole.

[0019] In some embodiments, a positive pole mark is provided at one end of the back cover.

[0020] In some embodiments, the back cover is provided with a chamfer at a position opposite to the limiting step in the mounting hole.

[0021] In some embodiments, the connecting sheet is copper foil. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the distance measuring ultrasonic sensor disclosed in the utility model;

[0023] Figure 2 It is a top view of the distance measuring ultrasonic sensor disclosed in the utility model (without the lead-out terminal wire);

[0024] Figure 3 It is a schematic diagram of the ranging ultrasonic sensor disclosed by the utility model.

[0025] Illustration: 1-metal shell, 2-positive lead, 3-pin, 4-piezoelectric element, 5-back cover, 6-terminal, 7-lead terminal wire, 8-connecting piece. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0027] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0031] The following will be combined Figure 1-Figure 3 , an ultrasonic sensor that is convenient for automated production according to the embodiment of the present application is described in detail. It should be noted that the following embodiments are only used to explain the present application and do not constitute a limitation on the present application.

[0032] Embodiment 1:

[0033] See also Figure 1-Figure 3, an ultrasonic sensor that is easy to produce automatically, comprising: a metal shell 1 and a back cover 5, a terminal 6, a lead, a piezoelectric element 4, a connecting piece 8, a lead-out terminal line 7, and a pin 3. The back cover 5 is provided with two through-going mounting holes; one end of a terminal 6 is arranged in the mounting hole; one end of a lead is correspondingly connected to the other ends of two terminals 6; the piezoelectric element 4 is bonded to the bottom of the metal shell 1; the other end of the lead is connected to the piezoelectric element 4; a limiting cavity is provided in the metal shell 1, and the back cover 5 is engaged in the limiting cavity; the connecting piece 8 is built into the back cover 5, and one end of the connecting piece 8 is as far as one of the mounting holes. In this embodiment, the connecting piece 8 is copper foil. The two ends of the lead-out terminal line 7 are respectively connected to one end of the terminal 6 and the connecting piece 8 located in the mounting hole; the pin 3 is used to fix the back cover 5 on the metal shell 1, and one end of the pin 3 is fixedly connected to the connecting piece 8.

[0034] In some embodiments, a cavity is provided in the metal shell 1 in the first direction, the piezoelectric element 4 is arranged at the bottom of the cavity, and the metal shell 1 is provided with the limiting cavity in the second direction, and the two ends of the limiting cavity are located on both sides of the cavity. The first direction and the second direction need to have a certain angle, so that they are easy to install and fix, and preferably the two are perpendicular.

[0035] In some embodiments, the back cover 5 includes a middle section and two ends, the two ends of the back cover 5 are arc-shaped, and the shapes of the two ends of the limiting cavity are adapted to the shapes of the two ends of the back cover 5; the mounting hole is provided in the middle section. The two ends of the back cover 5 are arranged in an arc shape for easy installation and positioning. The back cover 5 is made into a dumbbell shape for easy installation and positioning, and the size of the middle section is smaller than that of the two ends, so that the upper surface of the middle section is lower than the upper surface of the two ends, which is also convenient for subsequent glue filling and fixing.

[0036] At the same time, this structural design also leaves a large space near the middle section, which is convenient for welding the lead-out terminal wires 7 .

[0037] A limiting step is provided in the mounting hole. The limiting step is used to position the terminal 6 so that the two terminals 6 can be inserted into the mounting hole in place, which is convenient for automated production.

[0038] In order to achieve the effect of identification and fool-proofing, a positive pole mark is provided at one end of the rear cover 5 close to the segment.

[0039] Preferably, the rear cover 5 is provided with a chamfer at a position opposite to the limiting step in the mounting hole, so that the lead wire of the terminal 6 and the terminal 6 can be welded quickly and accurately.

[0040] The specific state process is as follows: a piezoelectric element 4 is bonded to the bottom end surface of the metal shell 1. Two terminals 6 are inserted into a back cover 5 to form a back cover assembly. Then the positive lead 2 and the negative lead are welded to the two terminals 6. A back cover assembly is inserted into the limiting cavity of the metal shell 1, and then the positive lead 2 and the negative lead are welded to the piezoelectric element 4, and then the sealing material is filled inside the metal shell 1, and finally a lead-out terminal wire 7 is welded to the two terminals 6.

[0041] Compared with the traditional solution, the advantages of this utility model are:

[0042] ①Simple structure: The rear cover and the terminal are combined into one component (rear cover assembly), and the rear cover assembly and the housing are assembled together by matching.

[0043] ② Fewer processes: 7 processes including gluing and bonding lead-out terminal wires and glue curing are reduced.

[0044] ③Short production cycle: The production cycle is reduced by 4 days.

[0045] ④ Fewer operators: 12 fewer people.

[0046] ⑤High degree of automation: The degree of automation is increased by 20%.

[0047] ⑥High product pass rate: the pass rate increased by 2%.

[0048] ⑦Low cost: The cost of a single product is reduced by about 0.5 yuan.

[0049] The above description is only a preferred embodiment of the present invention and is used to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultrasonic sensor that is easy to produce automatically, characterized in that: include: Metal shell and A rear cover, wherein the rear cover is provided with two penetrating mounting holes; A terminal, one end of which is disposed in the mounting hole; A lead wire, one end of which is connected to the other ends of the two terminals correspondingly; A piezoelectric element is bonded to the bottom of the metal shell; the other end of the lead is connected to the piezoelectric element; A limiting cavity is provided in the metal shell, and the rear cover is engaged in the limiting cavity; A connecting piece, the connecting piece is built into the back cover, and one end of the connecting piece is placed in one of the mounting holes; A lead-out terminal wire, two ends of which are respectively connected to one end of the terminal and a connecting piece located in the mounting hole; A pin is used to fix the back cover on the metal shell, and one end of the pin is fixedly connected to the connecting piece.

2. The ultrasonic sensor that is easy to produce automatically according to claim 1, characterized in that: A cavity is provided in the metal shell in the first direction, the piezoelectric element is arranged at the bottom of the cavity, and the metal shell is provided with the limiting cavity in the second direction, and two ends of the limiting cavity are located on both sides of the cavity.

3. The ultrasonic sensor that is easy to produce automatically according to claim 2, characterized in that: The first direction is perpendicular to the second direction.

4. The ultrasonic sensor that is easy to produce automatically according to claim 1, characterized in that: The rear cover comprises a middle section and two ends, the two ends of the rear cover are arc-shaped, and the shapes of the two ends of the limiting cavity are adapted to the shapes of the two ends of the rear cover; the mounting hole is arranged in the middle section.

5. The ultrasonic sensor that is easy to produce automatically according to claim 1, characterized in that: A limiting step is arranged in the mounting hole.

6. The ultrasonic sensor that is easy to produce automatically according to claim 1, characterized in that: One end of the rear cover is provided with a positive pole mark.

7. The ultrasonic sensor that is easy to produce automatically according to claim 5, characterized in that: The rear cover is provided with a chamfer at a position opposite to the limiting step in the mounting hole.

8. The ultrasonic sensor that is easy to produce automatically according to claim 1, characterized in that: The connecting sheet is copper foil.

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