KR200328094Y1 - A structure for waterproofing the electronic scale - Google Patents

Abstract

The present invention relates to an electronic balance for measuring the weight of an object, and in particular, (1) the load cell as a waterproof load cell, and the control unit, the display unit and the power supply unit in the waterproof case to achieve an economical and efficient waterproof effect due to their combined action In addition to this, it is possible to prevent the failure caused by the inflow of water, and (2) the gap between the inlet and the cable is compressed because the cable is compressed and adhered because the diameter of the waterproof case becomes smaller gradually from the outside to the inside. It is possible to prevent water from flowing in, as well as easy to insert the cable into the inlet itself, you can expect a satisfactory working efficiency, (3) the battery case by the lid of the waterproof battery case, that is, the waterproof battery case that stores the power supply If you close and rotate the holder, the lid will slide out of the battery holder. The sealing material is squeezed between the battery compartment and the lid by being pushed into the insertion space between the inlet and the coupling protrusion and then pushing against the coupling protrusion and the insertion protrusion, which become thick in opposite directions, so that the water through the gap between the battery compartment and the lid (4) When the housing is provided, the jaw portion formed along the circumference of the housing hole is surrounded by the cover portion formed outside the load transfer mechanism of the load plate, so that the opening of the hole is blocked. It relates to a waterproof structure of the electronic balance that can prevent water from flowing into the interior of the housing through.

Description

A structure for waterproofing the electronic scale}

The present invention relates to an electronic balance, and more particularly, to a waterproof structure of the electronic balance to improve the reliability of the product by waterproofing the parts vulnerable to water not directly exposed to water or moisture.

In general, an electronic scale is composed of a load plate for placing a measurement object, and a load cell, a control unit, a display unit, and a power supply unit for measuring and displaying the load of the measurement object transferred from the load plate.

Therefore, when the measuring object is placed on the load plate while the power is supplied, the load plate transmits the load of the measuring object to the load cell, the load cell detects the electric signal proportional to the load and sends it to the control unit, and the control unit according to the input electric signal The control signal is sent to the display unit, and the display unit displays the weight of the measurement object numerically in accordance with the control signal.

These load cell electronic scales are very precise electronic products due to the electrical connection between the elements. In particular, the load cell electronic balance can achieve its desired function as an electronic product by disconnection due to corrosion when the electrical connection is exposed to water or moisture. Since it is no longer embedded in the housing forming the exterior is configured not to be directly exposed to the outside.

However, such an electronic balance has a problem that cannot be prevented when water or moisture is introduced into the housing.

Therefore, in order to improve the above problems, that is, to configure the load cell, the control unit, the display unit, and the power supply unit so that water or moisture does not penetrate the element, the load of the measuring object is transferred between the load plate outside the housing and the load cell inside. Soft membranes should be used so that interference does not occur in free vertical motion, which is an inherent function of the means, and the coupling part of the housing divided up and down should be treated with a sealing material to be waterproof.

In this case, however, it is difficult to select a material (membrane) having excellent softness, and there is a great possibility of interference in up and down movement due to the influence of the surrounding environment and time, such as deterioration or adhesion of foreign matters, and the housing of the housing to be waterproofed. There is a problem that the coupling part is expensive and expensive.

On the other hand, the control unit, the display unit and the power unit may be separately or partially integrated to waterproof each case. In this case, a cable connecting the control unit and the power unit (or display unit), the load cell, and the control unit may be passed from inside to outside of the case. Inlet is required, and a structure or element (waterproof connector, etc.) for waterproofing the gap between the inlet and the cable is required, which makes the assembly process difficult and complicated, as well as costly.

On the other hand, in the electronic balance, when the power supply unit is a battery, the battery case is constructed by forming a battery case with a battery holder for storing the battery, a lid hinged to the battery holder, and a fastening means (protrusions and holes) for engaging the battery holder with the lid. It is easy to replace.

Therefore, there is an unavoidable gap between the battery compartment and the lid, and in order to prevent this gap, a sealing material (rubber) is placed between the battery compartment and the lid to close the lid.

However, such a structure has a problem that it is difficult to form the structure so that the opening and closing operation is convenient while the pressure acting the sealing action evenly.

Of course, in order to solve this problem may be provided with a plurality of fastening means, but in this case it is not preferable because it is cumbersome to use.

On the other hand, when the load cell is embedded in the housing in the electronic balance, the load transfer structure between the load plate and the load cell is specifically formed with a hole in the upper side of the housing, and is inserted into the load cell through the hole in the housing at the lower side of the load plate to transfer the load to the load cell. The load transfer mechanism is formed.

Here, the upper side of the hole is formed with a slightly protruding jaw portion to surround the hole along the periphery of the hole to prevent water from flowing into the housing through the hole.

However, such a structure has a problem that water flowing through the lower side of the pan and falling toward the hole or water splashing from the side easily flows into the housing through the hole because the opening of the hole is exposed to the outside.

The present invention has been made to solve the problems of the prior art, the control unit, the display unit, and the power supply unit to each case or a combination of two or more elements in a waterproofing case, the load cell uses a waterproofing itself, It is to provide a waterproof structure of the electronic balance that makes the entire waterproof easily and inexpensively by making the connection by the cable between them as a waterproof structure.

Another object of the present invention is that if the cable is inserted into the inlet of the case for passing the cable electrically connecting the load cell, the control unit, the display unit and the power supply unit, the cable is compressed and the structure is formed so as to be in close contact with the inlet, as well as to easily connect the cable. It is to provide a waterproof structure of the electronic balance that can easily prevent the inflow of water through the gap between the inlet and the cable fitted thereto.

Another object of the present invention is to close and turn the lid to the battery compartment and the lid with a built-in power supply unit is in contact with each other by forming an inclined protrusion to eliminate the gap between both the water inlet through the gap between the battery compartment and the lid It is to provide a waterproof structure of the electronic balance that can easily prevent it.

Another object of the present invention is to provide a cover that covers the chin at the lower part of the load plate when the housing forming the exterior block the entrance of the hole so as to prevent water from flowing directly into the case through the hole. The purpose is to provide a waterproof structure of the electronic balance.

1 is an exploded perspective view showing the configuration of the electronic balance according to the present invention,

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a conceptual diagram showing the operation relationship of the electronic balance according to the present invention,

4 is a cross-sectional view showing a water inflow prevention structure through a gap between the inlet of the waterproof case according to the present invention and the cable fitted thereto;

5 is an exploded perspective view illustrating a water inflow prevention structure through a gap between a waterproof battery case and a lid according to the present invention;

6 is a cross-sectional view and a plan view along the line B-B of FIG.

7 is a cross-sectional view and a perspective view showing a water inflow prevention structure through the hole of the housing according to the present invention.

<Explanation of symbols on main parts of the drawings>

110 housing 111 hole

112: jaw portion 120: load plate

121: load transfer mechanism 122: cover

130: waterproof load cell 140: control unit

150: display unit 160: power supply unit

170: waterproof case 170 ', 180': inlet

180: waterproof battery case 181: battery holder

182: flange 183: engaging projection

185: lid 186: insertion protrusion

187: stopper 189: sealing material

190: cable S: insertion space

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

The configuration of the electronic balance according to the present invention is shown in FIGS. 1 to 3.

As shown in FIGS. 1 to 3, the electronic scale according to the present invention includes a load plate 130, a load cell 130 for detecting an electrical signal proportional to the load of a measurement object placed on the load plate 120, and the load cell ( A control unit 140 for receiving an electrical signal from the controller 130 and transmitting a control signal, a display unit 150 for receiving and displaying a control signal from the control unit 140, and operation of the display unit 150 and the control unit 140. Cable for connecting the power supply unit 160, that is, the battery, the load cell 130, the control unit 140, the display unit 150 and the power supply unit 160 to transmit power or electrical signals to each other ( 190).

Here, the load cell 130 is connected to an elastic body that is deformed when an external force is applied, a strain gauge (usually four are attached) attached to a predetermined portion of the elastic body to convert the physical change of the elastic body into an electrical signal, and the strain gauge is connected to each other. As a load sensor including wires, ① Connect the wires connected to the external signal input / output with soft rubber or coating material, and to prevent the water or moisture from penetrating into the exposed parts of the wires for connection. Form a hole in the elastic body to insert the wire, and then fill the hole with a waterproof material to prevent the exposed part of the wire from being exposed. ② The elastic body is anodized or plated in part or whole to prevent corrosion, or its material It is a waterproof load cell made of stainless steel that does not corrode itself.

In addition, the control unit 140 and the display unit 150 are composed of a case body, a lid, and a sealing material, and when combined, the control unit 140 and the display unit 150 have a structure in which the sealing material is elastically sealed and waterproof, and an input device including buttons for inputting an external command on the surface thereof. Covered with a rubber sheet or plastic sheet coated with a waterproof adhesive so as to block the hole for installing the built-in waterproof case 170 is a waterproof bar, the control unit 140 and the display unit 150 is integrated If it consists of a built-in, if separated, each is built.

In addition, the power supply unit 160 is also a waterproof case having the same waterproof structure, that is, the waterproof battery case 180 is built in the waterproof bar, the waterproof battery case 180 is a storage space to accommodate the battery which is the power supply unit 160 and A battery holder 181 in which an inlet is formed and a flange portion 182 is formed outside the inlet, a lid 185 which is waterproof when the battery compartment 181 is opened and closed, and the lid ( It is composed of a sealing material 189 installed on the lid 185 between the 185 and the battery holder 181 to achieve a seal between the two (see Fig. 6).

Meanwhile, the control unit 140 and the display unit 150 are waterproof in one case, and the power supply unit 160 is waterproof in another case. However, all of them may be embedded in one case to be waterproof. have.

On the other hand, the waterproof case 170 and the waterproof battery case 180 is an inlet through which the cable 190 is fitted on one side so as to connect the control unit 140, the display unit 150, and the power supply unit 160 with each other by a cable 190. 170 'and 180' are respectively formed.

4 shows a water inflow prevention structure through a gap between the inlets 170 'and 180' of the present invention and the cable 190 fitted thereto.

Here, (A) is a cross-sectional view showing the shape of the inlet (170 ', 180'), (B) is a cross-sectional view showing a process of fitting the cable 190 to the inlet (170 ', 180').

As shown in FIG. 4, each of the inlets 170 ′ and 180 ′ is formed such that its diameter gradually decreases from the outside to the inside, and specifically, the maximum diameter is formed to be slightly larger than the diameter of the cable 190, and the minimum The diameter is formed to be slightly smaller than the diameter of the cable 190, the length of the minimum diameter portion is preferably formed to be long so that the contact area with the cable 190 is wide.

When the cable 190 is inserted into the inlets 170 ′ and 180 ′ to electrically connect the control unit 140, the display unit 150, and the power supply unit 160 inside the cover 170 and 180 to each other. First, the end of the cable 190 is inserted into the inlets 170 'and 180' from the outside to the inside, and then grasps the end that has entered the inside and slowly pulls the cable 190 to the inlets 170 'and 180'. Due to the smaller diameter, it is naturally compressed and fits into the inlets 170 'and 180'.

At this time, the compressed cable 190 is in close contact with the minimum diameter portion of the inlets 170 'and 180' due to its elasticity.

Therefore, water may be blocked from flowing into the waterproof cases 170 and 180 through a gap between the inlets 170 'and 180' and the cable 190 fitted thereto.

5 and 6 is a view showing a water inflow prevention structure through the gap between the battery holder 181 and the lid 185 according to the present invention.

In this case, (A) in Figure 6 is a cross-sectional view along the BB line showing the coupling state of the battery holder 181 and the lid 185, (B) is a process of coupling the lid 185 to the battery holder 181 This is the top view shown.

As shown in FIGS. 5 and 6, the battery holder 181 has a plurality of coupling protrusions 183 formed at regular intervals along the circumference of the flange portion 182, and the lid 185 is formed in the circumferential direction along the circumferential direction. An insertion protrusion 186 is formed to abut on each coupling protrusion 183 to prevent separation of the lid 185.

In this case, the coupling protrusion 183 is formed in an L-shape in which an end is bent toward the inside so that an insertion space S may be formed between the inlet and the inlet, and the thickness becomes thicker toward one end. It is formed to.

And the insertion protrusion 186 closes the entrance of the battery compartment 181 with the lid 185 and turns the lid 185 as the upper side is in contact with the lower side of the coupling protrusion 183 is inserted into the insertion space (S) as When the insertion protrusion 186 is inserted into the insertion space S, the lid 185 is pushed hard toward the battery holder 181 so that the sealing member 189 between the battery holder 181 and the lid 185 may be compressed. It is inclined to the upper side so that it becomes thicker toward the other end.

That is, the insertion protrusion 186 is formed to be thicker in the opposite direction to the coupling protrusion 183 so as to be pushed to each other when abutting.

On the other hand, the insertion protrusion 186 is rotated by turning the lid 185 at the end to prevent excessive rotation when turning the lid 185 to insert it into the insertion space (S) stopper 187 caught on the coupling protrusion 183. ) Is formed to protrude upward.

The waterproof battery case 180 is closed by placing the lid 185 on the battery holder 181 so that the insertion protrusion 186 is positioned between the coupling protrusion 183, and then closes the entrance of the battery holder 181, and then the lid ( Holding the handle in the 185, the lid 185 is strongly turned to insert the insertion protrusion (186) into the insertion space (S), the coupling is completed when the stopper 187 to the engaging projection 183 is completed.

At this time, the coupling protrusion 183 and the insertion protrusion 186 formed to have a thick thickness in the opposite direction to each other abuts and pushes each other to push the lid 185 toward the battery holder 181, the sealing material 189 by this action ) Is compressed between the battery holder 181 and the lid 185.

Therefore, water cannot flow into the battery holder 181 through a gap between the battery holder 181 and the lid 185.

On the other hand, the electronic balance of the present invention may be configured by embedding the load cell 130 in the housing 110 to form the appearance of the electronic balance as shown in FIG.

Here, the housing 110 is divided into an upper housing 110a and a lower housing 110b, among which the upper housing 110a is formed with a plurality of holes 111 on the upper side of the hole 111. A tubular jaw portion 112 is formed along the circumference from the upper side, and the load plate 120 has an elongated load transmitting mechanism 121 inserted into each hole 111 on the lower side to transmit the load to the load cell 130. .

In the present invention having such a housing 110, a waterproof structure to prevent water from flowing into the housing 110 through the hole 111 of the housing 110 is illustrated in FIG. 7.

At this time, (A) is a cross-sectional view showing the connecting portion of the housing 110 and the load plate 120, (B) is a perspective view showing a portion of the load transfer mechanism 121 of the load plate 120.

As illustrated in FIG. 7, the cover plate 122 is formed to cover the circumference of the jaw 112 at a predetermined distance from the outside of the load transfer mechanism 121 at a predetermined interval.

Of course, the cover portion 122 is formed to a length that can be positioned the upper end of the jaw portion 112 when the load plate 120 is fully raised.

As such, if the cover portion 122 is covered with the jaw portion 112 without interfering with the lifting operation of the load plate 120, the water flowing through the lower side of the load plate 120 or splashing from the side is scattered. 122 prevents the inflow into the housing 110 through the hole 111.

As described above with reference to the waterproof structure of the electronic balance according to the present invention with reference to the drawings, the present invention is not limited by the embodiments and drawings disclosed herein, various modifications can be made within the technical scope of the design Of course.

The present invention as described above (1) by using the load cell as a waterproof load cell, the control unit, the display unit and the power supply unit in the waterproof case can provide an economical and efficient waterproof effect due to their combined action, and also the inflow of water Failures caused by this can also be prevented.

(2) Since the inlet of the waterproof case gradually decreases in diameter from the outside to the inside, the cable is compressed and adhered to the cable so that water can be prevented from flowing through the gap between the inlet and the cable.

Of course, it is easy to insert the cable into the inlet itself, you can expect a satisfactory working efficiency.

(3) When the battery compartment is closed and turned with the lid of the waterproof case, that is, the waterproof battery case, in which the power supply unit is stored, the lid is thickened in the opposite direction after the insertion protrusion is inserted into the insertion space between the entrance of the battery compartment and the engaging protrusion. The engagement protrusion and the insertion protrusion abut each other, thereby compressing the sealing material between the battery compartment and the lid, thereby preventing water from flowing through the gap between the battery compartment and the lid.

(4) When the housing is provided, the jaw portion formed along the periphery of the hole of the housing is surrounded by the cover portion formed on the outside of the load transfer mechanism of the load plate, so that the entrance of the hole is blocked, so that water enters the inside of the housing through the hole. Can be prevented.

Claims (7)

A load plate on which a measurement object is placed, a load cell for detecting an electrical signal proportional to the load of the measurement object mounted on the load plate, a controller for receiving the electric signal and transmitting a control signal, and a measurement object receiving the control signal. In the electronic balance including a display unit for displaying the weight of the, a power supply unit for supplying power, and a cable electrically connecting the load cell and the power supply unit with the control unit and the display unit, the load cell is a waterproof load cell subjected to waterproofing, The control unit, the display unit and the power supply unit are each or two or more embedded in a waterproof case having a waterproof structure, the cable is waterproof structure of the electronic balance, characterized in that connected to the waterproof through the inlet formed in the waterproof case. The method of claim 1, Wherein each inlet is formed to gradually decrease in diameter from the outer side to the inner side so as to compress the cable inserted into the inlet so as to be in close contact with the inlet. The method of claim 1, The waterproof case in which the power unit is built is composed of a battery holder and a lid waterproof structure of the electronic balance, characterized in that the waterproofing is made by closing the lid. The method of claim 3, The battery holder has a coupling protrusion which is formed such that an end portion is bent toward the inside and the thickness thereof gradually increases toward one side so that an insertion space can be formed between the inlet and the flange portion of the inlet. The lid is formed in a large number, and the lid is formed to gradually increase in thickness toward the other side so as to close the battery holder with the lid and turn into the insertion space so as to come into contact with the coupling projection and push toward the battery holder to close the gap. The waterproof structure of the electronic scale, characterized in that the insertion protrusion is formed along the circumferential surface. The method according to claim 3 or 4, The waterproof structure of the electronic balance, characterized in that the sealing material is pressed between the battery holder and the lid is closed by closing the lid. The method of claim 1, The load cell forms an appearance of an electronic balance and has a hole formed in an upper side thereof, and is embedded in a housing in which a jaw portion is formed along the circumference of the hole, and the load plate is inserted into the hole to load a load of a measurement object on the load cell. Waterproof structure of the electronic balance, characterized in that the load transfer mechanism for transmitting is formed. The method of claim 6, The waterproof structure of the electronic scale, characterized in that the cover portion is formed on the outside of the load transfer mechanism of the load plate to cover the jaw portion at intervals so as to block the flow of water through the hole.