Digital tape measures and how to clean them

Abstract

The present invention discloses a digital tape measure and a cleaning method thereof, wherein the digital tape measure comprises a housing, a tape which is arranged in the housing and can be pulled out of the housing, and a length sensor which is arranged in the housing and is used to collect the length of the tape pulled out of the housing, and a cleaning strip is arranged on the terminal end of the tape; when the tape is pulled out until the cleaning strip contacts the sensing window of the length sensor, the cleaning strip is used to clean the sensing window of the length sensor. The present invention can well clean the length sensor therein, thereby improving the measurement accuracy.

Description

Technical Field

[0001] The invention relates to a digital tape measure and a cleaning method thereof. Background Art

[0002] At present, the digital tape measure in the prior art has a length sensor. After long-term use, dust accumulates at the sensing window of the length sensor to a certain extent, which will have a certain impact on the measurement result of the length sensor. The sensing window of the length sensor needs to be cleaned. Since the length sensor is installed in the shell of the digital tape measure, it is difficult to clean it directly. Disassembling it for cleaning will make the cleaning process very troublesome, and frequent disassembly will also bring some additional problems. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a digital tape measure which can well clean the length sensor therein, thereby improving the measurement accuracy.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a digital tape measure, which comprises:

[0005] case;

[0006] A tape ruler disposed in the housing and capable of being pulled out of the housing, wherein a cleaning strip is disposed on a terminal end of the tape ruler;

[0007] A length sensor is arranged in the shell and is used to collect the length of the tape being pulled out of the shell. When the tape is pulled out until the cleaning strip contacts the sensing window of the length sensor, the cleaning strip is used to clean the sensing window of the length sensor.

[0008] In order to enable the cleaning strip to be squeezed and deformed when it contacts the sensing window of the length sensor, thereby effectively cleaning the sensing window of the length sensor, the bottom surface of the cleaning strip is connected to the ruler tape, and the thickness of the cleaning strip is greater than the maximum distance between the sensing window of the length sensor and the ruler tape.

[0009] Furthermore, the thickness of the cleaning strip is 0.1 mm to 10 mm.

[0010] In order to further reduce the accumulation of dust on the sensing window of the length sensor, a transparent covering layer is provided on the sensing window of the length sensor.

[0011] Furthermore, the transparent covering layer is made of glass, PC, acrylic or sapphire.

[0012] In order to be able to abut against the tape so that the cleaning strip can contact the sensing window of the length sensor, the housing is provided with an abutting structure for abutting against the tape below the tape and at a position corresponding to the length sensor.

[0013] Furthermore, the abutting structure is at least one reinforcing rib arranged on the shell.

[0014] Furthermore, the digital tape measure also includes a processor and a display, the signal output end of the length sensor is connected to the signal input end of the processor so that the length sensor transmits the collected length value to the processor, and the signal input end of the display is connected to the signal output end of the processor so that the display is used to display the length value.

[0015] Furthermore, the digital tape measure also includes a tape self-winding box, the terminal end of the tape is connected to the tape self-winding box, and the tape is wound on the tape self-winding box.

[0016] The present invention also provides a method for cleaning a digital tape measure, the method comprising the following steps:

[0017] The ruler tape is pulled out of the housing to make the cleaning strip contact with the sensing window of the length sensor, and the sensing window of the length sensor is cleaned by the extrusion deformation of the cleaning strip when contacting the sensing window of the length sensor.

[0018] After adopting the above technical solution, by pulling the tape, the cleaning strip installed on the tape squeezes and cleans the sensing window of the length sensor, thereby realizing the cleaning of the sensing window of the length sensor without disassembling the shell, thereby improving the measurement accuracy and avoiding the trouble caused by disassembling the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure of the digital tape measure of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 The structure of the digital tape measure of the present invention is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0021] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0022] like Figure 1 , 2 As shown, a digital measuring tape comprises:

[0023] Shell 1;

[0024] A tape ruler 2 is arranged in the housing 1 and can be pulled out of the housing 1, and a cleaning strip 3 is arranged on the terminal end of the tape ruler 2;

[0025] A length sensor 4 is arranged in the housing 1 and is used to collect the length of the tape 2 pulled out of the housing 1. When the tape 2 is pulled out until the cleaning strip 3 contacts the sensing window of the length sensor 4, the cleaning strip 3 is used to clean the sensing window of the length sensor 4.

[0026] In order to enable the cleaning strip 3 to be squeezed and deformed when it contacts the sensing window of the length sensor 4, so as to effectively clean the sensing window of the length sensor 4, as shown in FIG. Figure 1 , 2 As shown, the bottom surface of the cleaning strip 3 is connected to the ruler tape 2 , and the thickness of the cleaning strip 3 is greater than the maximum distance between the sensing window of the length sensor 4 and the ruler tape 2 .

[0027] The thickness of the cleaning strip 3 is 0.1 mm to 10 mm.

[0028] In order to reduce the accumulation of dust on the sensing window of the length sensor 4, Figure 1 , 2 As shown, a transparent covering layer 5 is provided on the sensing window of the length sensor 4 .

[0029] The transparent cover layer 5 is made of glass, PC, acrylic or sapphire, but is not limited thereto.

[0030] In order to be able to abut against the tape 2, so that the cleaning strip 3 can contact the sensing window of the length sensor 4, as shown in FIG. Figure 1 As shown in FIGS. 2 and 3 , the housing 1 is provided with a resisting structure for resisting the tape 2 at a position below the tape 2 and corresponding to the length sensor 4 .

[0031] The cleaning method of the digital tape measure comprises the following steps:

[0032] The ruler tape 2 is pulled out of the housing 1 , so that the cleaning strip 3 contacts the sensing window of the length sensor 4 , and the sensing window of the length sensor 4 is cleaned by the extrusion deformation of the cleaning strip 3 when contacting the sensing window of the length sensor 4 .

[0033] The working principle of the present invention is as follows:

[0034] By pulling the tape 2, the cleaning strip 3 installed on the tape 2 squeezes and cleans the sensing window of the length sensor 4, thereby realizing the cleaning of the sensing window of the length sensor 4 without disassembling the shell, thereby improving the measurement accuracy and avoiding the trouble caused by disassembling the shell.

[0035] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A digital tape measure, characterized in that it include: Housing (1); A tape ruler (2) is arranged in the housing (1) and can be pulled out of the housing (1), and a cleaning strip (3) is arranged on the terminal end of the tape ruler (2); A length sensor (4) is arranged in the housing (1) and is used to collect the length of the tape ruler (2) pulled out of the housing (1); when the tape ruler (2) is pulled out until the cleaning strip (3) contacts the sensing window of the length sensor (4), the cleaning strip (3) is used to clean the sensing window of the length sensor (4), that is, the sensing window of the length sensor (4) is cleaned by the extrusion deformation of the cleaning strip (3) when it contacts the sensing window of the length sensor (4); The bottom surface of the cleaning strip (3) is connected to the ruler tape (2), and the thickness of the cleaning strip (3) is greater than the maximum distance between the sensing window of the length sensor (4) and the ruler tape (2); The housing (1) is provided with a resisting structure for resisting the tape (2) at a position below the tape (2) and corresponding to the length sensor (4), the resisting structure being suitable for resisting the tape (2), so that when the tape (2) is pulled out until the cleaning strip (3) contacts the sensing window of the length sensor (4), the cleaning strip (3) is squeezed and deformed to contact the sensing window of the length sensor (4); It also comprises a tape self-winding box (9), the terminal end of the tape (2) is connected to the tape self-winding box (9), and the tape (2) is wound around the tape self-winding box (9).

2. The digital measuring tape according to claim 1, characterized in that: The thickness of the cleaning strip (3) is 0.1 mm to 10 mm.

3. The digital tape measure according to claim 1, characterized in that: A transparent covering layer (5) is provided on the sensing window of the length sensor (4).

4. The digital tape measure according to claim 3, characterized in that: The transparent covering layer (5) is made of glass, PC, acrylic or sapphire.

5. The digital measuring tape according to claim 1, characterized in that: The abutting structure is at least one reinforcing rib (6) arranged on the shell (1).

6. The digital measuring tape according to claim 1, characterized in that: It also includes a processor (7) and a display (8), wherein the signal output end of the length sensor (4) is connected to the signal input end of the processor (7), so that the length sensor (4) transmits the acquired length value to the processor (7), and the signal input end of the display (8) is connected to the signal output end of the processor (7), so that the display (8) is used to display the length value.

7. A method for cleaning a digital tape measure as claimed in any one of claims 1 to 6, characterized in that The steps of the method include: The ruler tape (2) is pulled out of the housing (1) so that the cleaning strip (3) contacts the sensing window of the length sensor (4), and the sensing window of the length sensor (4) is cleaned by the extrusion deformation of the cleaning strip (3) when it contacts the sensing window of the length sensor (4).

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