CN218974461U - Two-in-one test pencil - Google Patents

Abstract

The utility model discloses a two-key integrated test pencil which comprises a shell, wherein a circuit board is arranged in the shell, a circuit for directly measuring voltage and a circuit for measuring induced electricity are arranged on the circuit board, a test head is arranged at the front end of the shell, a key is arranged on the shell and consists of a conductive film sleeve and a tact switch, the tact switch is fixedly arranged on the circuit board in a welding way, a normally closed contact of the tact switch is electrically connected with the circuit for directly measuring voltage, and a normally open contact of the tact switch is electrically connected with the circuit for measuring induced electricity. The normally closed contact of the light touch switch is electrically connected with the circuit for directly measuring voltage, and the normally open contact of the light touch switch is electrically connected with the circuit for measuring induction power, so that the function of two touch keys is realized by one light touch switch, and the purpose of simplifying the appearance of the test pencil is achieved.

Description

Two-in-one test pencil

Technical Field

The utility model belongs to the field of manufacturing of electric pens, and particularly relates to a two-key integrated test pencil.

Background

The test pencil is an electrical tool which is frequently used in daily life and work, and the pen body of the electronic test pencil is provided with the LED digital display screen, so that test values can be intuitively read, and the application is wider and wider. Referring to fig. 5, a conventional test pencil is provided with two operation keys, namely a direct key and an induction key, wherein the direct key is a direct measurement key, is touched on the surface of the direct key by hand, passes through a human body, and forms a loop when a test head directly touches a bare wire, so that the voltage is displayed on a digital display screen; the induction key is touched by hand, so as to measure whether the outer skin of the electric wire has induction electricity or not, and the test head needs to touch the outer skin of the electric wire for breakpoint detection or line indirect detection.

In the current test pencil, the direct key and the induction key are respectively and independently arranged on the shell of the test pencil, and the arrangement of the two touch keys is crowded because the surface area of the shell of the test pencil is smaller.

Disclosure of Invention

The utility model aims to provide a two-in-one test pencil so as to solve the problems in the background technology.

In order to solve the technical problems, the utility model is realized by the following technical measures: the utility model provides a two-key-in test pencil, includes the casing as the shell be equipped with the circuit board in the casing, be equipped with the circuit of direct voltage measurement and the circuit of measuring induced electricity on the circuit board the front end of casing is equipped with the test head that is held with the testee mutually, wherein keep away from on the casing the one end of test head is equipped with the button, the button comprises conducting film cover and tact switch, tact switch welded fastening is in on the circuit board, tact switch's normally closed contact and direct voltage measurement's circuit are electric connection each other, tact switch's normally open contact and the circuit of measuring induced electricity are electric connection each other.

Compared with the prior art, the utility model has the advantages that: in the prior art, a test pencil is provided with a direct key and an induction key, the direct key is electrically connected with a circuit for directly measuring voltage, the direct key is touched by hand on the surface of the direct key, and a loop is formed when a test head is used for directly touching a bare wire through a human body, so that the voltage is displayed on a digital display screen; the induction key is electrically connected with a circuit for detecting induction electricity, the surface of the induction key is touched by hands to measure whether the outer skin of the electric wire has induction electricity or not, and the test head needs to touch the outer skin of the electric wire for breakpoint detection or indirect line detection.

The two-key integrated test pencil is characterized in that a key (essentially a touch switch) is arranged at one end, far away from the test head, of the shell, the touch switch is welded and fixed on the circuit board, a normally closed contact of the touch switch is electrically connected with a circuit for directly measuring voltage, and a normally open contact of the touch switch is electrically connected with a circuit for measuring induced electricity, so that the functions of the two touch keys are realized by using one touch switch, and the purpose of simplifying the appearance of the test pencil is achieved.

As an improvement of the utility model, the conductive film sleeve encases the tact switch, and the conductive film sleeve is electrically connected with the common end of the tact switch. The purpose of the design is selected: the conductive film sleeve is arranged to cover the tact switch, so that sundries such as dust can not enter the tact switch, and the service life of the tact switch is prolonged. On the other hand, the common end of the conductive film sleeve and the tact switch forms a conductive loop.

As an improvement of the utility model, a digital display screen for displaying the voltage is arranged on the shell. The purpose of the design is selected: the setting of the digital display screen can more intuitively see the magnitude of the detected voltage.

As an improvement of the utility model, an induction lamp is arranged on the shell, and the position of the induction lamp is in front of the digital display screen. The purpose of the design is selected: when detecting the faradic electricity, if under the condition of faradic electricity, the induction lamp can shine, if under the condition of no faradic electricity, the induction lamp can not shine, through the setting of induction lamp, can reflect the existence of faradic electricity more directly perceivedly.

As an improvement of the utility model, the shell is divided into an upper cover and a bottom cover, and the upper cover and the bottom cover are mutually clamped and fixed. The purpose of the design is selected: the clamping structure is convenient to assemble and disassemble.

As an improvement of the utility model, a pen clip is arranged at the rear end of the bottom cover. The purpose of the design is selected: the pen clip is arranged, so that the test pencil can be clipped on a pocket of clothes when going out, and the portable electric clothes stand is convenient to carry.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a perspective view of a two-key integrated test pencil according to the present utility model.

FIG. 2 is an exploded view of the two-bond test pencil according to the present utility model.

Fig. 3 is a perspective view of a tact switch according to the present utility model.

Fig. 4 is a wiring diagram of a tact switch according to the present utility model.

Fig. 5 is a circuit diagram of a direct key and an inductive key according to the present utility model.

Reference numerals illustrate: 1. a housing; 2. a test head; 3. a digital display screen; 4. a key; 5. an upper cover; 6. a bottom cover; 7. a circuit board; 8. a conductive film cover; 9. touching the switch; 10. an induction lamp; 11. an inductive key; 12. a direct bond; 13. and a pen clip.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, and may be, for example, either fixed or removable; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Example 1

Referring to fig. 1-5, the two-key integrated test pencil provided in this embodiment includes a housing 1 as a casing, where the housing 1 is formed by mutually clamping an upper cover 5 and a bottom cover 6, so as to facilitate disassembly and assembly.

In the embodiment of the present utility model, a circuit board 7 is disposed inside the housing 1, please refer to fig. 5, and a circuit for directly measuring voltage and a circuit for measuring induced voltage are disposed on the circuit board 7, which is the same as a conventional test pencil circuit. In contrast, in the embodiment of the present application, the conventional "direct key 12" and "induction key 11" are replaced by a tact switch 9. The tact switch 9 is fixedly welded to the circuit board 7. Referring to fig. 4, the normally closed contact of the tact switch 9 is electrically connected to the circuit E for directly measuring voltage, and the normally open contact of the tact switch 9 is electrically connected to the circuit C D for measuring induced voltage.

In the embodiment of the application, an induction lamp 10 is arranged on a part, close to the test head 2, of the circuit board 7, a key 4 is arranged on one end, far away from the test head 2, of the circuit board 7, the key consists of a tact switch 9 and a conductive film sleeve 8 wrapping the tact switch 9, and a digital display screen 3 is clamped at the middle part of the circuit board 7.

In the embodiment of the present utility model, referring to fig. 2 and 3, the tact switch 9 is covered by the conductive film cover 8 to prevent impurities such as dust from entering the inside of the tact switch 9, thereby prolonging the service life of the tact switch 9. The upper cover 5 is provided with a notch, and the conductive film sleeve 8 is exposed from the notch. The conductive film sleeve 8 is electrically connected to the common terminal of the tact switch 9, i.e., the AB terminal in fig. 4.

In the embodiment of the present application, the housing 1 is provided with the induction lamp 10, and the induction lamp 10 is positioned in front of the digital display 3. When detecting the faradic electricity, if there is the condition of faradic electricity, induction lamp 10 can shine, if there is not the condition of faradic electricity, induction lamp 10 can not lighten, through the setting of induction lamp 10, can reflect more directly perceivedly that there is the existence of faradic electricity.

In the embodiment of the present application, a pen clip 13 is provided at the rear end of the bottom cover 6. When going out, the pen clip 13 of the test pencil can be clipped on the pocket of the clothes, so that the test pencil is convenient to carry.

In the two-key integrated test pencil provided in this embodiment, please refer to fig. 4, in a normal state, a A B end (a loop is formed by a human body when a hand touches) is electrically connected with an E end in a circuit, when a test head touches a tested wire, the circuit for directly testing voltage is conducted to form a loop, and at this time, the voltage can be displayed on a digital display screen. When the induction electricity is to be measured, the test head needs to touch the outer skin of the electric wire, the light touch switch is pressed, the A B end is conducted with the C D end in the circuit, the circuit for measuring the induction electricity forms a loop, and whether the outer skin of the electric wire has the induction electricity or not can be judged through the brightness or the non-brightness of the induction lamp.

The utility model provides a pair of two-in-one test pencil, its beneficial effect lies in: because the one end of keeping away from on the casing the test head is equipped with the button, contains the tact switch in the button, fixes tact switch welded ground on the circuit board, lets tact switch's normally closed contact and direct voltage measurement's circuit electric connection each other, lets tact switch's normally open contact and test induced electricity's circuit electric connection each other to realize the function of two touch keys with a tact switch, reach the purpose of simplifying the test pencil appearance.

The foregoing is illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the claims. The present utility model is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (6)

1. The utility model provides a test pencil of two bond unifications, includes casing (1) as the shell be equipped with circuit board (7) in casing (1), be equipped with the circuit of direct survey voltage and the circuit of survey induction electricity on circuit board (7) the front end of casing (1) is equipped with test head (2) that offsets with the measured object and bumps, characterized by: one end of the shell (1) far away from the test head (2) is provided with a key (4), the key (4) is composed of a conductive film sleeve (8) and a tact switch (9), the tact switch (9) is welded and fixed on the circuit board (7), a normally closed contact of the tact switch (9) is electrically connected with a circuit for directly measuring voltage, and a normally open contact of the tact switch (9) is electrically connected with a circuit for measuring induced electricity.

2. The two-in-one test pencil of claim 1, wherein: the touch switch (9) is covered by the conductive film sleeve (8), and the conductive film sleeve (8) is electrically connected with the public end of the touch switch (9).

3. The two-in-one test pencil of claim 1, wherein: a digital display screen (3) for displaying the voltage is arranged on the shell (1).

4. The two-in-one test pencil of claim 3, wherein: an induction lamp (10) is arranged on the shell (1), and the induction lamp (10) is positioned in front of the digital display screen (3).

5. The two-in-one test pencil of claim 1, wherein: the shell (1) is divided into an upper cover (5) and a bottom cover (6), and the upper cover (5) and the bottom cover (6) are mutually clamped and fixed.

6. The two-in-one test pencil of claim 5, wherein: the rear end of the bottom cover (6) is provided with a pen clip (13).

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