External defibrillator

Abstract

To provide an external defibrillator capable of holding an external paddle in a storage part and executing a conduction test appropriately both in a state that an adult electrode part is attached and in a state that an adult electrode part is removed.SOLUTION: An external defibrillator includes a first engagement part formed at a position facing an external paddle stored in a storage space of a storage part, and a second engagement part provided in the external paddle capable of engaging with the first engagement part. The first engagement part and the second engagement part are configured so as to hold the external paddle at first and second storage positions with different depths in the storage part.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a paddle housing structure in an external defibrillator.

Background Art

[0002] For example, an external defibrillator is known as a device that attempts to remove cardiac fibrillation by applying an electric shock to a patient whose heart has developed ventricular fibrillation and is unable to pump blood throughout the body in order to restore normal heart movement.

[0003] An external defibrillator has, for example, an external paddle and a defibrillator body that generates electrical energy to be supplied to the external paddle, as shown in Patent Document 1. The defibrillator body can also acquire information related to the state of the patient's heart (electrocardiogram ECG: Electrocardiogram) through the external paddle.

[0004] An upper case having a paddle housing portion is provided on the upper surface of the defibrillator body. The paddle housing portion has a concave housing space sized to accommodate the flange portion of the external paddle.

[0005] In addition, the paddle housing portion has a holding portion that holds the external paddle so that it does not pop out of the paddle housing portion. The holding portion has, for example, flexible engaging claws that engage with the side portion of the external paddle. Since the external paddle is held by the holding portion, for example, when the user carries the defibrillator with the external paddle housed in the paddle housing portion, the external paddle is prevented from popping out of the paddle housing portion.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] Incidentally, with external defibrillators, either adult electrodes or pediatric electrodes can be selected as the electrodes that are placed in contact with the patient's chest. Adult electrodes have a larger surface area than pediatric electrodes. Generally, the adult electrode section is attached to the external paddle over the pediatric electrode. In other words, the external paddle is used with the adult electrode section attached for adult patients, and with the adult electrode section removed for pediatric patients.

[0008] As described above, the external paddle housed in the paddle housing is held within the paddle housing to prevent it from flying out. However, conventionally, sufficient consideration had not been given to a configuration that could hold the external paddle within the paddle housing whether the adult electrode unit was attached or removed. For example, there were drawbacks such as being able to hold the external paddle within the paddle housing when the adult electrode unit was attached, but not being able to hold it within the paddle housing when the adult electrode unit was removed.

[0009] In addition, external defibrillators generally have electrodes for electrical conductivity testing on the bottom surface of the paddle housing. When the external paddles are placed in the paddle housing, the electrodes for electrical conductivity testing and the electrodes on the external paddles are electrically connected, allowing the electrical conductivity test to be performed in that state.

[0010] However, conventionally, sufficient consideration had not been given to a configuration that would allow for easy and effective current-conducting tests in both the state with the adult electrode attached and the state with the adult electrode removed.

[0011] The present invention has been made in consideration of the above points, and provides an external defibrillator that can hold the external paddles in the housing and can also perform electrical conduction tests well, whether the adult electrode section is attached or removed. [Means for solving the problem]

[0012] One embodiment of the external defibrillator of the present invention is: A pair of external paddles, each having an electrode portion that can come into contact with the patient's body surface, A defibrillator body to which the external paddles are connected and to which electrical energy for defibrillation is supplied for defibrillation, A housing section having a concave housing space for housing the external paddle, Of the aforementioned housing portion, a first engaging portion is formed at a position facing the external paddle housed in the housing space, The external paddle is provided with a second engaging portion which is capable of engaging with the first engaging portion, It has, The first and second engaging portions are configured to hold the external paddle in first and second housing positions of different depths within the housing portion. [Effects of the Invention]

[0013] According to the present invention, an external defibrillator can be realized that can hold the external paddles within the housing and perform electrical conduction tests well, whether the adult electrode section is attached or removed. [Brief explanation of the drawing]

[0014] [Figure 1] Front view of an external defibrillator according to an embodiment. [Figure 2] Perspective view showing the upper part of an external defibrillator. [Figure 3] Plan view showing the upper part of an external defibrillator. [Figure 4] Perspective view showing the relationship between the external paddle with the adult electrode attached and the housing. [Figure 5] Perspective view showing the relationship between the external paddle with the adult electrode section removed and the housing section. [Figure 6] Cross-sectional view showing the housing configuration with the adult electrode attached to the external paddle. [Figure 7]Cross-sectional view showing the accommodation state with the adult electrode part removed from the external paddle [Figure 8] Perspective view showing the state where the external paddle is leaned against the accommodation part [Figure 9] Plan view showing the state where the external paddle is leaned against the accommodation part [Figure 10] Cross-sectional view showing the configuration of another embodiment [Figure 11] Cross-sectional view showing the configuration of another embodiment

Mode for Carrying out the Invention

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0016] <1>Overall Configuration of External Defibrillator FIG. 1 is a front view of an external defibrillator 10 according to the present embodiment.

[0017] The external defibrillator 10 includes a defibrillator main body 20 and a pair of left and right external paddles 30. The external paddles 30 are connected to the defibrillator main body 20 by a connection cord 50. The defibrillator main body 20 generates electrical energy for defibrillation and supplies this electrical energy to the external paddles 30 via the connection cord 50. The user performs a defibrillation procedure by grasping the handle portion 30a of the external paddle 30 and pressing the electrodes of the external paddle 30 against the patient's chest.

[0018] The defibrillator main body 20 is provided with an output energy setting knob 71, an operation key 72, a display unit 73, etc. The user can set defibrillation energy, various modes, etc. by operating the output energy setting knob 71 and the operation key 72. An electrocardiogram of the patient etc. is displayed on the display unit 73.

[0019] A main body handle portion 60 is provided at the upper part of the defibrillator main body 20, and the user can lift and move the external defibrillator 10 by grasping the main body handle portion 60.

[0020] Regarding other components of the external defibrillator 10, a known configuration can be used, so the explanation will be omitted.

[0021] <2> Configuration of the paddle storage compartment Next, the configuration of the paddle housing section (hereinafter simply referred to as the "housing section") of this embodiment will be described using Figures 2 to 11.

[0022] Figures 2 and 3 are perspective and plan views, respectively, showing the upper structure of the external defibrillator 10. Figure 4 is a perspective view showing the external paddle 30 and housing 100 with the adult electrode section 40 attached. Figure 5 is a perspective view showing the external paddle 30 and housing 100 with the adult electrode section 40 removed.

[0023] As can be seen in Figure 2, the housing section 100 is formed in the upper case 20a attached to the top of the defibrillator body 20. The housing section 100 has a concave housing space for housing the extracorporeal paddles 30.

[0024] Specifically, as can be seen from Figures 4 and 5, the upper opening of the housing section 100 is sized to match the outer shape of the flange 31 of the external paddle 30, and the lower opening of the housing section 100 is sized to match the outer shape of the adult electrode section 40. Furthermore, the depth of the housing section 100 is approximately equal to the height from the bottom surface of the adult electrode section 40 to the flange 31 when the adult electrode section 40 is attached. As a result, the external paddle 30 fits snugly inside the housing section 100 without any lateral movement when the adult electrode section 40 is attached.

[0025] A test electrode 110 is provided on the bottom surface 101 of the housing 100. The test electrode 110 is a leaf spring-shaped metal plate, with one end protruding upward from the bottom surface 101. The other end of the test electrode 110 is connected to an electrical circuit (not shown) inside the defibrillator body 20.

[0026] A pediatric electrode P1 (Figures 6 and 7) is formed below the flange 31 of the external paddle 30. The adult electrode section 40 is attached to the lower part of the external paddle 30 so as to cover the pediatric electrode P1. In this embodiment, the adult electrode section 40 can be attached to and detached from the external paddle 30 by sliding.

[0027] An adult electrode P2 (Figure 6) is formed on the lower surface of the adult electrode section 40. The adult electrode P2 has a larger area than the pediatric electrode P1. Note that the mounting structure of the adult electrode section 40 is not limited to the structure of this embodiment; essentially, any structure that allows the adult electrode P2 to be freely attached below the pediatric electrode P1 is acceptable.

[0028] When the external paddle 30 is housed in the housing section 100, the adult electrode P1 or pediatric electrode P2 comes into contact with the test electrode 110, making it possible to perform an electrical conduction test.

[0029] In addition to the above configuration, in this embodiment, as can be seen from Figures 4 and 5, a second flange 31a is formed below the flange 31.

[0030] Furthermore, as can be seen from Figures 2 and 3, the storage section 100 is provided with a retractable section 21. The retractable sections 21 are provided in opposite positions in each of the left and right storage sections 100. In other words, there are two retractable sections 21 for each storage section 100.

[0031] In other words, the forward / backward section 21 is provided on the side of the housing section 100 that faces the external paddle 30 housed in a concave housing space. The forward / backward section 21 is configured to move forward and backward in the direction of the external paddle 30. The forward / backward section 21 restricts the upward movement of the external paddle 30 housed in the housing section 100. The detailed configuration and operation of the forward / backward section 21 will be described later.

[0032] <3> Retention of the external paddle in the containment section Next, the holding structure for the external paddle 30 in the housing section 100 according to this embodiment will be described in detail.

[0033] Figures 6 and 7 are cross-sectional views taken when the external paddle 30 is housed in the housing section 100, with the upper case 20a and the external paddle 30 cut by a vertical plane passing through the retractable section 21. In particular, Figure 6 is a cross-sectional view with the adult electrode section 40 attached to the external paddle 30, and Figure 7 is a cross-sectional view with the adult electrode section 40 removed from the external paddle 30.

[0034] First, let's explain the configuration of the retractable section 21 in detail. The retractable section 21 is an L-shaped component made of resin. The base of the retractable section 21 is fixed to the upper case 20a by screws 21b. As mentioned above, in the external defibrillator 10, there are two retractable sections 21 for each housing section 100, so a total of four retractable sections 21 are provided. The four screws 21b that fix each retractable section 21 to the upper case 20a also have the function of fixing the upper case 20a to the defibrillator body 20. In other words, the tips of the screws 21b reach the defibrillator body 20.

[0035] As a result, in this embodiment, the screw 21b allows for the fixing of the retractable part 21 to the upper case 20a and simultaneously the fixing of the upper case 20a to the defibrillator body 20. Since the retractable part 21 is not molded integrally with the upper case 20a but is a separate part, if the retractable part 21 is damaged, only the damaged part 21 needs to be replaced, without having to replace the entire upper case 20a. This improves maintainability.

[0036] A claw 21a is formed near the tip of the rising portion of the reciprocating section 21, protruding in the direction of the external paddle 30. The claw 21a is movable in the forward direction indicated by arrow d1 and the backward direction indicated by arrow d2 due to the elasticity of the reciprocating section 21 itself.

[0037] Next, the operation of the forward / backward unit 21 will be explained.

[0038] As shown in Figure 6, when the external paddle 30 to which the adult electrode portion 40 is attached is moved by the user in the housing direction c2 and housed in the housing portion 100, the claws 21a of the retractable portion 21 contact the upper surface of the second flange 31a, thereby restricting the movement of the external paddle 30 in the direction of departure c1 from the housing portion 100, and holding the external paddle 30 in a predetermined position within the housing portion 100. This predetermined position is where the surface of the adult electrode P2 substantially coincides with the bottom surface portion 101 of the housing portion 100.

[0039] Strictly speaking, at this predetermined position, the surface of the adult electrode P2 is slightly raised from the bottom surface 101 of the housing 100. This is because the external paddle 30 is biased in the direction of deviation c1 by the spring force of the test electrode 110. In other words, the positional relationship between the claw 21a and the flange 31a, and the biasing force of the test electrode 110, positions the surface of the adult electrode P2 slightly raised by a predetermined distance from the bottom surface 101 of the housing 100. As a result, at the above predetermined position, the bottom surface 101 does not come into contact with the surface of the adult electrode P2, but only the test electrode 110 comes into contact with it, thus improving the reliability of the electrical connection between the adult electrode P2 and the test electrode 110.

[0040] When performing defibrillation, the user holds the handle portion 30a of the external paddle 30 and pulls the external paddle 30 upward in the displacement direction c1 from the storage position shown in Figure 6. At this time, if the pulling force overcomes the elastic force of the retractable portion 21, the claw 21a of the retractable portion 21 moves in the retraction direction d2. As a result, the claw 21a moves over the second flange 31a, and the external paddle 30 moves in the displacement direction c1.

[0041] On the other hand, as shown in Figure 7, when the external paddle 30 from which the adult electrode portion 40 has been removed is housed in the housing portion 100, the claws 21a of the advancement / retraction portion 21 come into contact with the upper surface of the first flange 31, thereby restricting the movement of the external paddle 30 in the direction of deviation c1 from the housing portion 100, and holding the external paddle 30 in a predetermined position within the housing portion 100. This predetermined position is the position where the surface of the pediatric electrode P1 is in near contact with the bottom surface portion 101 of the housing portion 100.

[0042] Strictly speaking, at this predetermined position, the surface of the pediatric electrode P1 is slightly raised from the bottom surface 101 of the housing 100. This is because the external paddle 30 is biased in the direction of deviation c1 by the spring force of the test electrode 110. In other words, the positional relationship between the claw 21a and the flange 31, and the biasing force of the test electrode 110, position the surface of the pediatric electrode P1 slightly raised by a predetermined distance from the bottom surface 101 of the housing 100. As a result, at the above predetermined position, the bottom surface 101 does not come into contact with the surface of the pediatric electrode P1, but only the test electrode 110 comes into contact with it, thus improving the reliability of the electrical connection between the pediatric electrode P1 and the test electrode 110.

[0043] When performing defibrillation, the user holds the handle portion 30a of the external paddle 30 and pulls the external paddle 30 upward in the displacement direction c1 from the storage position shown in Figure 7. At this time, if the pulling force overcomes the elastic force of the retractable portion 21, the claw 21a of the retractable portion 21 moves in the retraction direction d2. As a result, the claw 21a moves over the first flange 31, and then over the second flange 31a, causing the external paddle 30 to move in the displacement direction c1.

[0044] In this way, the first and second flanges 31, 31a and the retractable portion 21 ensure that both the pediatric electrode P1 and the adult electrode P2 are in contact with the test electrode 110 with a constant force. As a result, the contact pressure between the pediatric electrode P1 and the test electrode 110 is approximately the same as the contact pressure between the adult electrode P2 and the test electrode 110, allowing for a current-conducting test under uniform contact resistance, thereby improving the reliability of the current-conducting test. For example, the reliability of the current-conducting test is improved compared to a case where the user presses the external paddle 30 downward to ensure contact with the test electrode 110.

[0045] <4> Leaning the external paddles against the containment section In this embodiment, the external paddles 30 can be propped up in the storage section 100.

[0046] Figures 8 and 9 are perspective and plan views, respectively, showing the external paddle 30 propped up in the housing 100. Although Figures 8 and 9 show the external paddle 30 with the adult electrode section 40 attached propped up, it is also possible to prop up the external paddle 30 with the adult electrode section 40 removed.

[0047] An elongated hole 22 is formed in the side wall of the housing section 100. The elongated hole 22 is cut out vertically from the side wall of the upper case 20a (which may also be called the side wall of the housing section 100), with one end opening at the upper end of the upper case 20a (which may also be called the upper end of the housing section 100) and the other end (lower end) reaching the bottom surface 101 of the upper case 20a (which may also be called the bottom surface 101 of the housing section 100), and the width of the hole is greater than the thickness of the flange 31 of the external paddle 30.

[0048] A guide groove 23 extending vertically is formed on the wall surface of the upper case 20a facing the elongated hole 22. The width of the guide groove 23 is greater than the thickness of the flange 31 of the external paddle 30.

[0049] As can be seen from Figures 8 and 9, the external paddle 30 can be propped up in the housing section 100 by inserting the flange 31 into the elongated hole 22 and the guide groove 23 from above.

[0050] The elongated hole 22 and guide groove 23 are formed in such a position that when the flange 31 of the external paddle 30 is inserted into the elongated hole 22 and guide groove 23, the handle portion 30a of the external paddle 30 is positioned outside the housing portion 100. This allows the user to easily grasp the handle portion 30a from outside the housing portion 100. In addition, the handle portion 30a and the flange 31 clamp the wall surface of the upper case 20a, stabilizing the upright position of the handle portion 30.

[0051] In the actual use of the external defibrillator 10, the user first removes the external paddles 30 from the housing 100 and then applies conductive gel to the electrodes P1 or P2 to be used. Next, the user turns on the external defibrillator 10 and presses the external paddles 30 against the patient's chest. In this state, the external defibrillator 10 acquires the patient's electrocardiogram.

[0052] Next, when the user presses the shock button, electrical energy is supplied to the patient from the external paddles 30 to perform electrical defibrillation. The user then performs cardiac massage or other procedures on the patient as needed. After that, the user presses the external paddles 30 against the patient's chest again as needed to perform defibrillation.

[0053] If there are two or more people performing the procedure, the roles can be divided between one person performing defibrillation with the external paddle 30 and another performing cardiac massage or other procedures. Therefore, the person performing defibrillation can wait while the other person performs cardiac massage or other procedures after the first defibrillation, and then perform a second defibrillation.

[0054] In contrast, if only one person is available to perform the procedure, that person must also perform procedures such as cardiac massage. In this case, when performing procedures such as cardiac massage, the external paddles 30 must be placed somewhere.

[0055] In this embodiment, the external paddle 30 can be conveniently propped up in the housing 100 as shown in Figures 8 and 9. In particular, placing the external paddle 30 directly on the floor or ground is undesirable as it may contaminate the conductive gel. Also, completely housing the external paddle 30 in the housing 100 as shown in Figures 6 and 7 is undesirable as it may cause the conductive gel to adhere to the bottom surface 101 of the housing 100 or the test electrode 110. The configuration of this embodiment avoids these inconveniences.

[0056] Furthermore, as described above, the lower end of the elongated hole 22 reaches the bottom surface 101 of the upper case 20a. As a result, the elongated hole 22 functions as a drain hole, preventing water from accumulating in the storage section 100.

[0057] Furthermore, in this embodiment, the bottom surface 101 of the housing 100 is sloped downwards toward the lower end of the elongated hole 22. This further prevents water from accumulating in the housing 100. It is also preferable to make the height of the lower end of the elongated hole 22 lower than the height of the mounting portion of the test electrode 110. This prevents the test electrode 110, which is susceptible to the effects of water accumulation, from being submerged in water.

[0058] Thus, according to the configuration of this embodiment, the elongated hole 22 is provided with both the function of draining water from the housing section 100 and the function of propping up the external paddle 30, so that the water drainage function and the propping function can be realized with a simple configuration.

[0059] <5> Effects of the Embodiment As described above, the external defibrillator 10 of this embodiment includes a pair of external paddles 30, each having electrode portions (electrodes P1, P2) that can contact the surface of the patient's body; a defibrillator body 20 that supplies electrical energy for defibrillation to the external paddles 30; a housing section 100 having a concave housing space for housing the external paddles 30; a first engaging portion (retracting portion 21) formed in the housing section 100 at a position facing the external paddles 30 housed in the housing space; and a second engaging portion (flange 31, 31a) provided on the external paddles 30 and capable of engaging with the first engaging portion (retracting portion 21). The first engaging portion (retracting portion 21) and the second engaging portion (flange 31, 31a) are configured to hold the external paddles 30 in first and second housing positions of different depths within the housing section 100. This makes it possible to realize an external defibrillator 10 that can hold the external paddle 30 within the housing 100 and perform a good electrical conduction test, whether the adult electrode section 40 is attached or removed.

[0060] In this embodiment, the first housing position is the position where the distance between the surface of the adult electrode 40 and the bottom surface of the housing 100 when the adult electrode 40 is attached is a first distance, and the second housing position is the position where the distance between the surface of the pediatric electrode and the bottom surface of the housing 100 when the adult electrode 40 is removed is a second distance, and the first distance and the second distance are equal.

[0061] Furthermore, in this embodiment, as shown in Figure 6, the difference t1 between the upper surface of the first flange 31 and the upper surface of the second flange 31a is equal to the difference t2 in the thickness of the extracorporeal paddle 30 when the adult electrode section 40 is attached and when the adult electrode section 40 is removed.

[0062] <6> Other embodiments The embodiments described above are merely examples of how the present invention can be implemented, and the technical scope of the present invention should not be limited by them. In other words, the present invention can be implemented in various ways without departing from its gist or its main features.

[0063] In the above-described embodiment, the second engaging portion is configured to have a first flange 31 having an upper surface that abuts against the retractable portion 21 at the first housing position, and a second flange 31a having an upper surface that abuts against the retractable portion 21 at a second housing position lower than the first housing position. However, the present invention is not limited to this. In short, the first and second engaging portions should be configured to hold the external paddle 30 at first and second housing positions of different depths within the housing portion 100.

[0064] Figures 10 and 11, which show corresponding parts with the same reference numerals as in Figures 6 and 7, are cross-sectional views illustrating the configuration of another embodiment. In the configuration of Figures 10 and 11, the retractable portion 21 as the first engaging portion includes a first retractable member (claw 21a) that engages with the second engaging portion (flange 31a) at a first housing position, and a second retractable member (claw 21c) that engages with the second engaging portion (flange 31a) at a second housing position lower than the first housing position.

[0065] As shown in Figure 10, the difference t1 between the position of the first retractable member (claw 21a) and the position of the second retractable member (claw 21c) is equal to the difference t2 in the thickness of the extracorporeal paddle 30 when the adult electrode section 40 is attached and when the adult electrode section 40 is removed.

[0066] Even with this configuration, the same effects as those of the embodiment described above can be obtained.

[0067] Let me explain in detail. As shown in Figure 10, when the external paddle 30 to which the adult electrode portion 40 is attached is housed in the housing portion 100, the claw 21a of the retractable portion 21 abuts against the upper surface of the flange 31a, thereby restricting the movement of the external paddle 30 in the direction of deviation c1 from the housing portion 100, and holding the external paddle 30 in a predetermined position within the housing portion 100.

[0068] On the other hand, as shown in Figure 11, when the extracorporeal paddle 30 from which the adult electrode portion 40 has been removed is housed in the housing portion 100, the claws 21c of the retractable portion 21 come into contact with the upper surface of the flange 31a, thereby restricting the movement of the extracorporeal paddle 30 in the direction of deviation c1 from the housing portion 100, and holding the extracorporeal paddle 30 in a predetermined position within the housing portion 100.

[0069] In the above-described embodiment, a case was mentioned in which a retractable portion 21 is formed as a first engaging portion in the housing portion 100 and flanges 31 and 31a are formed as second engaging portions in the external paddle 30. However, the present invention is not limited to this. For example, a flange may be formed as a first engaging portion in the housing portion 100 and a retractable portion may be formed as a second engaging portion in the external paddle 30. Furthermore, the first and second engaging portions are not limited to the retractable portion 21 and flanges 31 and 31a as in the above-described embodiment. In short, the first and second engaging portions should be configured to hold the external paddle in first and second housing positions at different depths within the housing portion. [Industrial applicability]

[0070] The present invention is suitable for an external defibrillator in which an adult electrode section can be attached to and removed from an external paddle. [Explanation of symbols]

[0071] 10 External defibrillator 20 Defibrillator body 20a Upper case 21 Advancement and retreat section 21a, 21c Nails 21b Screw 22 long hole 23 Guide groove 30 external paddles 30a Handle section 31, 31a Flange 40 Adult electrode section 50 connection cords 60 Main body handle section 100 storage units 101 Bottom part 110 Test electrodes

Claims

1. a pair of external paddles each having an electrode portion that can come into contact with a body surface of a patient; a defibrillator main body connected to the external paddles and supplying electrical energy for defibrillation to the external paddles; a housing portion having a concave housing space for housing the extracorporeal paddle; a first engagement portion formed in the accommodation portion at a position facing the extracorporeal paddle accommodated in the accommodation space; a second engaging portion provided on the extracorporeal paddle and engageable with the first engaging portion; and the first engaging portion and the second engaging portion are configured to hold the extracorporeal paddle at first and second accommodation positions having different depths within the accommodation portion. External defibrillator.

2. the first engagement portion is a retractable portion provided on a side surface of the housing portion facing the extracorporeal paddle and retractable toward the extracorporeal paddle, the second engagement portion is a flange of the extracorporeal paddle; 10. The external defibrillator of claim 1.

3. The second engagement portion a first flange having a surface that contacts the advancing / retreating portion at the first accommodation position, and a second flange having a surface that contacts the advancing / retreating portion at the second accommodation position that is deeper than the first accommodation position; 3. The external defibrillator of claim 2.

4. The first engagement portion a retractable portion provided at a side position of the housing portion facing the extracorporeal paddle, the retractable portion being retractable toward the extracorporeal paddle; The advancing and retreating portion is a first advancing / retreating member that engages with the second engaging portion at the first accommodation position, and a second advancing / retreating member that engages with the second engaging portion at the second accommodation position that is deeper than the first accommodation position, 10. The external defibrillator of claim 1.

5. The pair of external paddles are each configured to allow attachment and detachment of an adult electrode portion, the first storage position is a position where a distance between a surface of the adult electrode and a bottom surface of the storage portion when the adult electrode portion is attached is a first distance, and the second storage position is a position where a distance between a surface of the child electrode and a bottom surface of the storage portion when the adult electrode portion is detached is a second distance; the first distance and the second distance are equal; 5. An external defibrillator according to any one of claims 1 to 4.

6. The pair of external paddles are each configured to allow attachment and detachment of an adult electrode portion, a difference between an upper surface of the first flange and an upper surface of the second flange is equal to a difference in thickness of the external paddle when the adult electrode portion is attached and when the adult electrode portion is removed; 4. The external defibrillator of claim 3.

7. The pair of external paddles are each configured to allow attachment and detachment of an adult electrode portion, a difference between the position of the first advancing / retracting member and the position of the second advancing / retracting member is equal to a difference in thickness of the external paddle when the electrode unit for adult use is attached and when the electrode unit for adult use is detached; 5. The external defibrillator of claim 4.

8. a plate spring that contacts the electrode portion of the accommodated external paddle is provided on the bottom surface of the accommodation portion; An external defibrillator according to any one of claims 1 to 7.

9. The leaf spring is used for electrical testing of the extracorporeal paddle.

9. The external defibrillator of claim 8.

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