JP2012009771A - Waterproof apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof apparatus that has a long lifetime by devising a gasket member shape of a cover member.SOLUTION: The waterproof apparatus includes: a recess 2a of a waterproof apparatus body 2; a cover member 3 coupled to the apparatus body by a rotary shaft 3a and rotating on the shaft to move between a recess closing position and a recess opening position to open and close the recess; and a waterproof seal member 4 surrounding a peripheral edge of the recess when the cover member is at the closing position. The waterproof seal member 4 is formed in a rectangular annular shape having four linear wall portions 4a provided to an inner side face of the cover member, protruding from the inner side face to an abutting surface of the peripheral edge of the recess, and surrounding respective sides of the peripheral edge of the recess, and four arcuate wall portions 4b connecting two mutually adjacent wall portions among the four linear wall portions, and when the cover member moves from the opening position to the closing position and abuts against the abutting surface to be compressed and deformed, a wall portion tip at a position apart from the rotary shaft is displaced to outside the peripheral edge of the recess in a section of a plane perpendicular to the inner side face of the cover member and also perpendicular to wall surfaces of the wall portions, and a radius R of arcuate portions of four corners of the rectangular annular shape of the waterproof seal member before the compressive deformation is set so that tensile stress σz of the arcuate parts is less than rubber deterioration stress σ0.

Description

  The present invention relates to a waterproof device, and more particularly to a waterproof structure between a lid member that covers an opening of a recess of the device body and the device body.

  2. Description of the Related Art Conventionally, in a small and portable electronic device such as a camera, a concave portion is provided on the device main body side so that constituent members such as a battery (battery) and a recording medium can be attached to and detached from the device main body. In some cases, a lid member that opens and closes between a closed position that covers the opening and an open position that opens the opening of the concave portion is provided.

  Further, in such an electronic device or the like, a waterproof structure is provided between the device main body and the lid member, and a watertight structure that prevents water from entering the recess when the lid member is disposed at the closed position. As a result, so-called waterproof devices configured so that the electronic devices can be used in a waterside environment, an underwater environment, and the like have been put into practical use and are widely spread.

  In a conventional waterproof device, a waterproof structure configured between a lid member that can be opened and closed and a recess on the device body side (for example, a battery storage chamber or a recording medium storage portion) includes a packing member or the like on the inner surface of the lid member. For example, Japanese Patent Application Laid-Open No. 05-021965 has a structure in which when the lid member is disposed at the closed position, the packing member is pressed against the contact surface of the peripheral edge of the recess on the apparatus body side. It is proposed by No. Gazette.

  In the conventional waterproof device of such a form, as a packing member applied in order to implement | achieve a waterproof structure, elastic materials, such as a rubber member, are applied, for example. It is generally well known that such a material such as a rubber member applied to a packing member or the like deteriorates with time.

Japanese Patent Laid-Open No. 05-021965

  However, the packing member applied to the conventional waterproof device disclosed by the above-mentioned Japanese Patent Application Laid-Open No. 05-021965 simply has an optimal shape for maintaining the watertightness between the device main body and the lid member. In the conventional waterproof device, it is general that the shape of the packing member is not designed in consideration of, for example, the deterioration of the packing member over time.

  It is well known that when a packing member made of a rubber member or the like deteriorates with time, its waterproof performance is lowered. It has been found that the deterioration with time occurring in the packing member is caused by, for example, stress applied during use. Therefore, when the stress applied to the packing member is non-uniform, the degree of deterioration with time may be partially different, and the stress applied to the packing member when the lid member is placed at the closed position as a whole. It is desirable that it is below the degradation stress.

  The present invention has been made in view of the above-described points, and an object of the present invention is a waterproof structure between a lid member covering an opening of a recessed portion of an apparatus main body and the apparatus main body, and the opening of the recessed portion The shape of the packing member provided on the lid member configured to rotate between the closed position that covers the opening and the open position that opens the opening of the concave portion is changed to the packing member when the lid member is disposed at the closed position. To provide a waterproof device having a waterproof structure that can suppress the generation of excessive stress applied to the packing member by setting in consideration of the applied stress, and thus realize a long life of waterproof performance in the waterproof device. It is.

In order to achieve the above object, a waterproof device according to the present invention is connected to a concave portion provided in a waterproof device main body by a rotation shaft and rotated around the rotation shaft. A lid member that opens and closes between a closed position that covers the recess and an open position that opens the recess; and a seal member that surrounds the periphery of the recess when the lid member is disposed at the closed position. Four linear wall portions provided on the inner side surface of the lid member, projecting from the inner side surface toward the contact surface of the peripheral edge of the recess, and surrounding each side of the peripheral edge of the recess, and the four linear shapes The wall portion is formed in a rectangular ring shape having four arcuate wall portions connecting two linear wall portions adjacent to each other, and the lid member moves from the open position to the closed position, and the contact surface When it is compressed and deformed in contact with the In a cross section of the wall portion in a plane perpendicular to the wall surface, the tip of the wall portion disposed at a position away from the rotation axis in the wall portion is deformed toward the outer periphery of the concave portion. The above-mentioned waterproof seal member has a radius R of the arc-shaped portion before compression deformation at the four corners of the rectangular ring, and the tensile stress σz at the arc-shaped portion is the rubber deterioration stress σ0. To be less than, that is,
σz = E (R′−R) / R <σ0
(E = Young's modulus of rubber, R '= radius after deformation of the arcuate part)
It is characterized in that it is set so as to hold.

  According to the present invention, the waterproof structure is between the lid member that covers the opening of the recess of the device body and the device body, and between the closed position that covers the opening of the recess and the open position that opens the opening of the recess. Excessive stress applied to the packing member by setting the shape of the packing member provided on the lid member that rotates and moves in consideration of the stress applied to the packing member when the lid member is placed in the closed position. Therefore, it is possible to provide a waterproof device having a waterproof structure that can suppress the occurrence of the above and thus realize a long life of waterproof performance in the waterproof device.

The principal part expansion perspective view which expands and shows a part of waterproof device of one embodiment of the present invention (near a lid member) 1 is a plan view showing only the lid member in the waterproof device of FIG. 1 and showing the inner surface of the lid member. Sectional drawing which shows schematically the cross section which follows the [III]-[III] line in the lid member of FIG. A main part enlarged view schematically showing a stress distribution applied to the waterproof seal member by cutting out a part ([IV] portion) of the waterproof seal member of the lid member of FIG. The conceptual diagram which shows notionally one modification of the cover member in the waterproof apparatus of FIG. The conceptual diagram which shows notionally another modification of the cover member in the waterproof apparatus of FIG.

  FIG. 1 is an enlarged perspective view of a main part, which is a part of a waterproof device according to an embodiment of the present invention, and shows an enlarged vicinity of a portion where a recess and a lid member formed in the device body are disposed. FIG. 2 is a plan view showing only the lid member in the waterproof device of FIG. 1 and showing the inner surface of the lid member. FIG. 2 mainly shows the planar shape of the packing member provided on the lid member. FIG. 3 is a cross-sectional view schematically showing a cross section taken along line [III]-[III] in the lid member of FIG. FIG. 4 is an essential part enlarged view schematically showing a stress distribution applied to the waterproof seal member by extracting a part ([IV] portion) of the waterproof seal member of the lid member of FIG.

  In each drawing used for the following description, each component may be shown with a different scale in order to make each component large enough to be recognized on the drawing. Therefore, according to the present invention, the number of constituent elements, the shape of the constituent elements, the ratio of the constituent element sizes, and the relative positional relationship of the constituent elements described in these drawings are limited to the illustrated embodiments. It is not a thing.

  One embodiment of the present invention shows an example in which the present invention is applied to a camera as a waterproof device. Moreover, in FIGS. 1-4, only the principal part of the camera of this embodiment is shown in figure.

  The camera 1 of this embodiment has a recess 2 a in a part of the device main body 2. The recess 2a corresponds to, for example, a battery (battery), a battery storage chamber for storing a recording medium, etc., a recording medium storage chamber, and the like. Therefore, a substantially rectangular opening for taking in and out a battery (battery), a recording medium and the like is formed in the recess 2a.

  The opening of the recess 2 a can be freely opened and closed by a lid member 3. The cover member 3 has a flat surface formed in, for example, a rectangular shape, and includes a shaft portion 3a that is a rotation shaft at one end thereof. The shaft portion 3 a is pivotally supported with respect to the fixed portion of the device main body 2, thereby connecting the lid member 3 and the fixed portion of the device main body 2. The lid member 3 is rotatable in the direction of the arrow RX in FIG. 1 with the shaft portion 3a as a rotation center point (see symbol O in FIG. 2), that is, around the rotation shaft (shaft portion 3a). . With such a configuration, the lid member 3 is configured to rotate between a closed position that covers the concave portion 2a and an open position that opens the concave portion 2a to open and close the opening of the concave portion 2a. Yes. In addition, the state shown in FIG. 1 has shown the state in which the cover member 3 exists in the open position which makes the opening of the recessed part 2a open.

  Further, a waterproof seal member 4 is provided on the inner surface of the lid member 3 so as to surround the peripheral edge of the recess 2a when the lid member 3 is disposed at the closed position to realize a watertight structure. Here, the inner side surface of the lid member 3 refers to a surface facing the recess 2a when the lid member 3 is disposed at the closed position.

  The waterproof seal member 4 is a packing member formed with a wall-like portion formed so as to protrude from the inner surface of the lid member 3 toward the contact surface 2b of the peripheral edge of the recess 2a.

  More specifically, as shown in FIG. 2, the wall-shaped portion of the waterproof seal member 4 includes four linear wall portions 4a facing the four sides (straight portions) of the peripheral portion of the recess 2a, and these four straight lines. It has four arcuate wall portions 4b that connect two linear wall portions 4a adjacent to each other in an arc shape, and is formed so as to be a rectangular ring as a whole.

  As the waterproof seal member 4, a stretchable material such as a rubber member is applied.

  Therefore, when the lid member 3 moves from the open position to the closed position, the waterproof seal member 4 comes into contact with the contact surface 2b, and when the cover member 3 is pressed toward the contact surface 2b from this state, the waterproof member is waterproof. The seal member 4 is compressed. As a result, the waterproof seal member 4 is compressed and deformed so that the space between the lid member 3 and the contact surface 2b of the device main body 2 is watertight.

  Further, in this state, in the cross section in the plane perpendicular to the inner surface of the lid member 3 and perpendicular to the wall surface of the linear wall portion 4a, out of the linear wall portions 4a The protruding end portion of the linear wall portion 4a of the waterproof seal member 4 disposed at a position away from the shaft portion 3a (the tip side of the lid member 3) is outward from the periphery of the recess 2a in the rectangular annular shape of the waterproof seal member 4 It is designed to be displaced toward. Further, the protruding end portion of the linear wall portion 4a close to the shaft portion 3a is displaced toward the concave portion 2a.

Further, the waterproof seal member 4 has an arc radius of the arcuate wall portion 4b formed at the four corners of the rectangular ring in the state before compression deformation = R, and tensile stress = σz in the arcuate wall portion 4b, E = The Young's modulus of rubber and the arc radius R 'of the arcuate wall portion 4b after compression deformation, so that the tensile stress σz is less than the rubber deterioration stress σ0, that is, σz = E (R'-R) / R <σ0
The above formula is set to hold.

  Further, in the present embodiment, the positional relationship between the shaft portion 3a that is a rotation shaft and the contact surface 2b (the surface on which the waterproof seal member 4 contacts) on the device main body 2 side is as shown in FIG. It shall be. That is, the shaft portion 3a and the contact surface 2b are provided in parallel. At the same time, the shaft portion 3a is disposed on the outer side of the device body 2 with respect to the contact surface 2b. In other words, the shaft portion 3a is at an upper position separated from the contact surface 2b by a necessary predetermined distance.

In the camera 1 having such a configuration, the waterproof seal member 4 has two corners on the side (base end side) close to the shaft portion 3a serving as the rotation shaft of the lid member 3 among the four arc-shaped wall portions 4b. Assuming that the arc radius RA of the two arc-shaped wall portions 4b and the arc radius RB of the two arc-shaped wall portions 4b at the corners on the side far from the shaft portion 3a (tip side) (see FIG. 2), RA is smaller than RB. So that RB is greater than RA, ie
RA <RB
Is set to hold.

  In the camera 1 of the present embodiment configured as described above, an operation when the lid member 3 is pivotally moved from the open position to the closed position will be described below.

  For example, when the lid member 3 is in the open position as shown in FIG. 1, the lid member 3 is in a direction along the arrow RX in FIG. 1, and the inner surface of the lid member 3 contacts the recess 2 a of the device body 2. Turn in the direction of contact. Then, first, two arcuate wall portions 4b on the side close to the shaft portion 3a (base end side) of the waterproof seal member 4 provided on the inner surface of the lid member 3, and a linear wall portion 4a connecting them, Each tip of the abutment abuts against the abutment surface 2b of the device body 2. From this state, when the lid member 3 is further pressed toward the contact surface 2b, the portion of the waterproof seal member 4 that previously contacts the contact surface 2b is compressed and deformed, and the length of the cover member 3 is increased. The linear walls 4a on the two sides in the side direction also abut against the abutment surface 2b while being gradually compressed and deformed. And finally, each tip of two arcuate wall portions 4b on the side (tip side) farthest from the shaft portion 3a of the waterproof seal member 4 and a linear wall portion 4a connecting them is the device body 2 It abuts on the abutting surface 2b in a compressed and deformed state. In this state, the surface of the lid member 3 is substantially flush with the surface of the device body 2. And the cover member 3 will be in the fixed state which maintained the closed position with respect to the apparatus main body 2 with the predetermined | prescribed lock mechanism (not shown). The position of the lid member 3 at this time is referred to as a closed position, and the state of the lid member 3 when this state is reached is referred to as a closed state.

  When the lid member 3 is disposed at the closed position, the waterproof seal member 4 is disposed at a position where the whole of the rectangular ring surrounds the opening of the recess 2a and is pressed toward the contact surface 2b to be compressed and deformed. It has become.

  FIG. 4 is an enlarged view of a main part schematically showing a part of the waterproof seal member 4, that is, a part indicated by reference numeral [IV] in FIG. 2.

  In FIG. 4, the solid line indicates the state of the waterproof seal member 4 before compressive deformation, and the symbol R indicates the arc radius of the arcuate wall portion 4b before the compressive deformation. In FIG. 4, a line indicated by a two-dot chain line indicates a state after compression deformation of the waterproof seal member 4, and a symbol R ′ indicates an arc radius of the arcuate wall portion 4 b after compression deformation.

  Here, the radius of the arcuate wall portion 4b in the state where the lid member 3 is in the open position and no load is applied to the waterproof seal member 4 (when in the natural state) is R, and the lid member 3 is in the closed position. Thus, the radius of the arcuate wall portion 4b in a state where the waterproof seal member 4 is compressed and deformed is R ′.

  In this case, the state before and after the compression deformation of the waterproof seal member 4 will be considered with reference to the schematic diagram of FIG. When the lid member 3 is in the closed position, the linear wall portion 4a of the waterproof seal member 4 is deformed in the direction of the arrow X2, that is, in the direction orthogonal to each wall surface as shown in FIG. When the lid member 3 is in the closed position, the arcuate wall portion 4b of the waterproof seal member 4 is also orthogonal to the direction of the arrow X2 shown in FIG. 4, that is, the wall surface of the arcuate wall portion 4b. It deforms in the direction (radial direction). At the same time, the arcuate wall portion 4b is pulled in the circumferential direction along the wall surface of the arcuate wall portion 4b as the linear wall portion 4a is compressed and deformed, thereby generating a strain εz. As a result, a tensile stress σz in the direction of arrow S is also generated in the arcuate wall 4b.

On the other hand, in FIG.
The rotation center point of the shaft portion 3a is denoted by reference symbol O,
Of the contact points between the distal end of the waterproof seal member 4 and the contact surface 2b, the contact point on the side close to the shaft portion 3a (base end side) is denoted by reference symbol T1.
Of the contact points between the tip of the waterproof seal member 4 and the contact surface 2b, the contact point on the side (tip side) far from the shaft portion 3a is denoted by T2.
The angle between the straight line connecting the rotation center point O and the contact point T1 and the contact surface 2b is denoted by θ1.
An angle formed by a straight line connecting the rotation center point O and the contact point T2 and the contact surface 2b is represented by the symbol θ2.
Of the reaction force received from the contact surface 2b when the lid member 3 is in the closed position, the reaction force at the contact point T1 is denoted by F.
Of the reaction force received from the contact surface 2b when the lid member 3 is in the closed position, the reaction force at the contact point T2 is denoted by reference symbol F ′.
Each shall be shown.

  In this case, when the lid member 3 is in the closed position, the horizontal force generated by the reaction force F, which is the vertical drag at the contact point T1, is NF (N: friction coefficient), and is the vertical drag at the contact point T2. The horizontal force generated by the reaction force F ′ is NF ′. Any resultant force acts in the direction of the arrow X1 shown in FIG. 3, that is, from the shaft portion 3 a of the lid member 3 toward the outside. That is, the resultant force Ft ′ of F ′ and NF ′ gives a bending moment to the linear wall 4a that is separated (distant) from the shaft 3a, and the deformation of the linear wall 4a that is close to the other shaft 3a. Bending deformation is larger than The resultant force Ft of F and NF applied to the linear wall portion 4a close to the shaft portion 3a has a relatively small bending moment component and a large compressive force component, and is less deformed than the former. From this, the portion of the waterproof seal member 4 provided on the lid member 3 that rotates about the shaft portion 3a as the rotation center is in contact with the contact surface 2b on the side far from the shaft portion 3a (tip side). It tends to be deformed toward the outside (see FIG. 3).

  Then, as the linear wall portion 4a is deformed outward, the arc-shaped wall portion 4b is pulled in the circumferential direction (that is, the strain εz increases), and thus the tensile stress σz also increases. . From this, when the lid member 3 is in the closed position, the tensile stress σz of the arcuate wall portion 4b on the distal end side that is easily deformed outward is closer to the shaft portion 3a (base end side). It can be seen that it is larger than the tensile stress σz of the arcuate wall portion 4b.

  On the other hand, it is well known that the tensile stress σz can be reduced as the arc radius of the arcuate wall 4b increases.

σz = Eεz
= E (2πR ′ / 4−2πR / 4) / 2πR / 4
= E (R'-R) / R
From the above, the waterproof seal member 4 in the present embodiment has the arc radius of the arcuate wall portion 4b near the shaft portion 3a, of the arcuate wall portions 4b at the four corners in the rectangular ring, and the arcuate shape on the tip side. If the arc radius of the wall 4b is RB, the relationship between them is RA <RB
It is set to become.

As described above, according to the embodiment, when the lid member 3 is disposed at the closed position covering the recess 2a of the device body 2, the waterproof seal member 4 contacts the contact surface 2b of the peripheral edge of the recess 2a. In the camera 1 that realizes a waterproof structure by being in contact and compressively deformed, the waterproof seal member 4 is formed at the four corners of the rectangular ring and has a radius R of the arc-shaped wall portion 4b in a state before compression deformation. So that the tensile stress σz in 4b is less than the rubber degradation stress σ0, that is,
σz = E (R′−R) / R <σ0
(E = Young's modulus of rubber, R '= radius after deformation of the arcuate part)
Therefore, it is possible to suppress the deterioration of the arcuate wall portion 4b with respect to the linear wall portion 4a.

  Further, among the arcuate wall portions 4b at the four corners of the rectangular annular waterproof seal member 4, the arc radius of the arcuate wall portion 4b on the tip side is higher than the arc radius of the arcuate wall portion 4b near the shaft portion 3a = RA = Since the RB is set to be larger (RA <RB), it becomes possible to set the waterproof seal to be equal to or lower than the deterioration stress as a whole, and the stress applied to each of the four corners of the waterproof seal member 4 is made uniform. It can also be made. Therefore, it can suppress that the waterproof seal member 4 deteriorates partially. As a result, the lifetime of the waterproof performance of the camera 1 can be increased.

  In the above-described embodiment, as shown in FIG. 3, the positional relationship between the shaft portion 3a, which is a rotation shaft, and the contact surface 2b with which the lid member 3 contacts is such that the shaft portion 3a and the contact surface 2b are in contact with each other. Are arranged so as to be parallel to each other, and the shaft portion 3a is illustrated as being disposed closer to the outer surface of the device body 2 with respect to the contact surface 2b.

  However, the arrangement of the shaft portion 3a of the lid member 3 and the contact surface 2b in the camera 1 is not limited to this example, and may be different.

  For example, the example shown in FIG. 5 conceptually shows a modified example different from the above-described embodiment in the arrangement of the lid member and the contact surface in the waterproof device.

  In the example shown in FIG. 5, the shaft portion 3a as the rotation shaft is provided in parallel with the contact surface 2b, which is the same as in the above-described embodiment. However, in this example, the shaft portion 3a is disposed on the same plane as the contact surface 2b.

  In this case, when the lid member 3 is in the closed position, the reaction force, which is the normal force at the contact point T1, becomes F, and the reaction force, which is the normal force at the contact point T2, becomes F '. It works in the direction perpendicular to the direction. From this, it is considered that the waterproof seal member 4 is applied with substantially uniform stress compared to the above-described embodiment, and there is little difference in deformation due to the part.

Therefore, in the configuration of this example, the arc radius of the two arcuate wall portions 4b at the corners close to the shaft portion 3a at the four corners of the waterproof seal member 4 is RA, and the corner on the side farther from the shaft portion 3a is RA. If the arc radius before compression deformation of the two arcuate wall portions 4b of the part is RB, the arc radius RA and the arc radius RB are equal, that is, RB = RA
It may be set so as to hold.

  On the other hand, the example shown in FIG. 6 conceptually shows another modified example different from the one embodiment and the modified example in the arrangement of the lid member and the contact surface in the waterproof device.

  In the example shown in FIG. 6, the shaft portion 3a as the rotation shaft is provided in parallel with the contact surface 2b, which is the same as in the above-described embodiment. However, in this example, the shaft portion 3a is arranged at an inner portion of the device main body 2 than the contact surface 2b. In other words, the shaft portion 3a is in a lower position that is dive with a predetermined distance from the contact surface 2b.

  In this case, when the lid member 3 is in the closed position, the horizontal force generated by the reaction force F, which is the vertical reaction force at the contact point T1, is NF, and the reaction force F ′, which is the vertical reaction force at the contact point T2. The resulting horizontal force is NF 'as in the above embodiment. However, in this example, both resultant forces work in the direction of the arrow X3 shown in FIG. 6, that is, toward the shaft portion 3 a side of the lid member 3. That is, the resultant force of F and NF gives a bending moment to the linear wall portion 4a close to the shaft portion 3a, and the bending deformation is larger than the deformation of the linear wall portion 4a away from the other shaft portion 3a. . The resultant force of F ′ and NF ′ applied to the linear wall portion 4a away from the shaft portion 3a is a force having a relatively small bending moment component and a large compressive force component, and is less deformed than the former. As described above, depending on the arrangement of the shaft portion 3a, the deformation of the linear wall portion 4a closer to the shaft portion 3a becomes larger, or the deformation of the linear wall portion 4a far from the shaft portion 3a depends on the arrangement of the shaft portion 3a. Deformation becomes large. That is, the vector direction of the resultant force is determined depending on the arrangement of the shaft portion 3a, and the pressure of this vector is applied to the linear wall portion 4a. That is, the center position of the shaft portion 3a determines the angle θ (θ1, θ2) formed by the line segment connecting the center and the contact points T1, T2 and the contact surface 2b, and is given to the contact points T1, T2. The direction of force will be determined. Therefore, the waterproof seal member 4 provided on the lid member 3 that rotates about the shaft portion 3a is located closer to the contact surface 2b on the side closer to the shaft portion 3a (base end side). Easy to deform toward the outside.

Therefore, in the configuration of this example, the arc radius of the two arcuate wall portions 4b at the corners close to the shaft portion 3a at the four corners of the waterproof seal member 4 is RA, and the corner on the side farther from the shaft portion 3a is RA. If the arc radius before compression deformation of the two arcuate wall portions 4b of the part is RB, the arc radius RA is larger than the arc radius RB, that is, RB <RA
It may be set so as to hold.

  According to the configuration of the present invention described above, the stress generated in the waterproof seal member can be appropriately set to a safe value, and the stress generated in the waterproof seal member can be made uniform.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and applications can of course be implemented without departing from the spirit of the invention. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if several constituent requirements are deleted from all the constituent requirements shown in the above-described embodiment, if the problem to be solved by the invention can be solved and the effect of the invention can be obtained, this constituent requirement is deleted. The configured structure can be extracted as an invention.

  The present invention is not limited to the camera as the waterproof device shown in the above-described embodiment, and other forms of waterproof devices such as mobile phones, recording devices, electronic notebooks, personal computers, game devices, televisions, watches It can be applied to various waterproof devices such as navigation devices using GPS (Global Positioning System).

DESCRIPTION OF SYMBOLS 1 ... Camera 2 ... Equipment main body 2a ... Concave part 2b ... Contact surface 3 ... Lid member 3a ... Shaft part 4 ... Waterproof seal member 4a ... Linear wall part 4b ... Arc-shaped wall part

Claims (5)

In waterproof equipment,
A recess provided in the waterproof device body;
A lid member that is connected to the waterproof device body by a rotation shaft, and that moves around the rotation shaft to open and close between a closed position that covers the recess and an open position that opens the recess;
A seal member for enclosing the periphery of the recess when the cover member is disposed at a closed position, the seal member being provided on an inner surface of the cover member, from the inner surface toward a contact surface of the periphery of the recess. And four arcuate wall portions connecting the two linear wall portions adjacent to each other among the four linear wall portions. When the lid member moves from an open position to a closed position and abuts against the abutment surface and compressively deforms, the wall surface of the wall portion is perpendicular to the inner surface of the lid member. Waterproof, formed so that the tip of the wall portion disposed at a position away from the rotation axis of the wall portion is deformed toward the outer periphery of the concave portion in a cross section in a plane perpendicular to the wall A sealing member;
Comprising
In the waterproof seal member, the radius R of the arcuate part before compression deformation at the four corners of the rectangular ring is set so that the tensile stress σz in the arcuate part is less than the rubber deterioration stress σ0, that is,
σz = E (R′−R) / R <σ0
(E = Young's modulus of rubber, R '= radius after deformation of the arcuate part)
A waterproof device, which is set so that When the pivot shaft is provided in parallel with the contact surface, and the pivot shaft is disposed outside the waterproof device main body from the contact surface, the pivot shaft of the waterproof seal member is the first If the arc radius before compression deformation at the near corner is RA and the arc radius before compression deformation at the corner far from the rotation axis is RB, the RA is smaller than the RB, that is,
RB> RA
The waterproof device according to claim 1, wherein the waterproof device is set so as to hold. When the pivot shaft is provided in parallel with the contact surface, and the pivot shaft is disposed outside the waterproof device main body from the contact surface, the pivot shaft of the waterproof seal member is the first If the arc radius before compression deformation at the near corner is RA and the arc radius before compression deformation at the corner far from the rotation axis is RB, the RB is larger than the RA, that is,
RB> RA
The waterproof device according to claim 1, wherein the waterproof device is set so as to hold. When the pivot shaft is provided in parallel with the contact surface, and the pivot shaft is disposed inside the waterproof device main body from the contact surface, the pivot shaft of the waterproof seal member is the first If the arc radius before compression deformation at the near corner is RA and the arc radius before compression deformation at the corner far from the rotation axis is RB, the RA is larger than the RB, that is,
RB <RA
The waterproof device according to claim 1, wherein the waterproof device is set so as to hold.   The waterproof device according to claim 1, wherein the recess is a battery storage chamber or a recording medium storage chamber of the waterproof device.

Images